From bc96366c864c07ef352edb92017357917c75b36c Mon Sep 17 00:00:00 2001
From: Steven Hartland <smh@FreeBSD.org>
Date: Sat, 17 Jan 2015 14:44:59 +0000
Subject: [PATCH] Mechanically convert cddl sun #ifdef's to illumos

Since the upstream for cddl code is now illumos not sun, mechanically
convert all sun #ifdef's to illumos #ifdef's which have been used in all
newer code for some time.

Also do a manual pass to correct the use if #ifdef comments as per style(9)
as well as few uses of #if defined(__FreeBSD__) vs #ifndef illumos.

MFC after:	1 month
Sponsored by:	Multiplay
---
 cddl/contrib/opensolaris/cmd/dtrace/dtrace.c  |  32 +-
 .../opensolaris/cmd/lockstat/lockstat.c       |  24 +-
 cddl/contrib/opensolaris/cmd/lockstat/sym.c   |  19 +-
 .../opensolaris/cmd/mdb/tools/common/die.c    |   8 +-
 .../opensolaris/cmd/mdb/tools/common/util.h   |   2 +-
 .../opensolaris/cmd/plockstat/plockstat.c     |  14 +-
 .../opensolaris/cmd/sgs/include/alist.h       |   2 +-
 .../contrib/opensolaris/cmd/sgs/include/sgs.h |   2 +-
 cddl/contrib/opensolaris/cmd/zfs/zfs_main.c   |  12 +-
 .../opensolaris/cmd/zpool/zpool_vdev.c        |  18 +-
 .../opensolaris/common/util/strtolctype.h     |   2 +-
 .../opensolaris/lib/libctf/common/ctf_lib.c   |  10 +-
 .../opensolaris/lib/libdtrace/common/drti.c   |  24 +-
 .../lib/libdtrace/common/dt_aggregate.c       |   4 +-
 .../opensolaris/lib/libdtrace/common/dt_cc.c  |  10 +-
 .../lib/libdtrace/common/dt_consume.c         |   6 +-
 .../opensolaris/lib/libdtrace/common/dt_dof.c |   4 +-
 .../lib/libdtrace/common/dt_error.c           |   2 +-
 .../lib/libdtrace/common/dt_handle.c          |   2 +-
 .../lib/libdtrace/common/dt_ident.c           |   6 +-
 .../lib/libdtrace/common/dt_impl.h            |  14 +-
 .../opensolaris/lib/libdtrace/common/dt_lex.l |  10 +-
 .../lib/libdtrace/common/dt_link.c            |  32 +-
 .../opensolaris/lib/libdtrace/common/dt_map.c |   8 +-
 .../lib/libdtrace/common/dt_module.c          |  24 +-
 .../lib/libdtrace/common/dt_open.c            |  55 ++--
 .../lib/libdtrace/common/dt_options.c         |   6 +-
 .../lib/libdtrace/common/dt_parser.c          |   2 +-
 .../opensolaris/lib/libdtrace/common/dt_pid.c |  30 +-
 .../lib/libdtrace/common/dt_pragma.c          |   2 +-
 .../lib/libdtrace/common/dt_printf.c          |  18 +-
 .../lib/libdtrace/common/dt_proc.c            |  58 ++--
 .../lib/libdtrace/common/dt_program.c         |   2 +-
 .../lib/libdtrace/common/dt_provider.c        |   4 +-
 .../lib/libdtrace/common/dt_subr.c            |  16 +-
 .../lib/libdtrace/common/dt_work.c            |   2 +-
 .../opensolaris/lib/libdtrace/common/dtrace.h |   6 +-
 .../lib/libdtrace/i386/dt_isadep.c            |  10 +-
 .../opensolaris/lib/libgen/common/gmatch.c    |   4 +-
 .../opensolaris/lib/libzfs/common/libzfs.h    |   4 +-
 .../lib/libzfs/common/libzfs_dataset.c        |  28 +-
 .../lib/libzfs/common/libzfs_diff.c           |   2 +-
 .../lib/libzfs/common/libzfs_import.c         |  18 +-
 .../lib/libzfs/common/libzfs_mount.c          |  24 +-
 .../lib/libzfs/common/libzfs_pool.c           |  26 +-
 .../lib/libzfs/common/libzfs_sendrecv.c       |   2 +-
 .../lib/libzfs/common/libzfs_util.c           |   6 +-
 .../opensolaris/tools/ctf/cvt/barrier.c       |   8 +-
 .../opensolaris/tools/ctf/cvt/barrier.h       |   2 +-
 .../opensolaris/tools/ctf/cvt/ctfconvert.c    |   4 +-
 .../opensolaris/tools/ctf/cvt/ctfmerge.c      |  12 +-
 .../contrib/opensolaris/tools/ctf/cvt/dwarf.c |   4 +-
 .../opensolaris/tools/ctf/cvt/output.c        |   6 +-
 .../contrib/opensolaris/tools/ctf/cvt/tdata.c |   2 +-
 cddl/contrib/opensolaris/tools/ctf/cvt/util.c |   2 +-
 .../opensolaris/common/util/strtolctype.h     |   2 +-
 .../opensolaris/uts/common/dtrace/dtrace.c    | 276 +++++++++---------
 .../opensolaris/uts/common/dtrace/fasttrap.c  | 110 +++----
 .../contrib/opensolaris/uts/common/fs/gfs.c   |  14 +-
 .../opensolaris/uts/common/fs/zfs/arc.c       |  24 +-
 .../opensolaris/uts/common/fs/zfs/dmu.c       |   8 +-
 .../opensolaris/uts/common/fs/zfs/dnode.c     |   6 +-
 .../opensolaris/uts/common/fs/zfs/spa.c       |  20 +-
 .../opensolaris/uts/common/fs/zfs/sys/dmu.h   |   2 +-
 .../opensolaris/uts/common/fs/zfs/sys/spa.h   |   2 +-
 .../uts/common/fs/zfs/sys/spa_impl.h          |   4 +-
 .../opensolaris/uts/common/fs/zfs/sys/zvol.h  |   8 +-
 .../opensolaris/uts/common/fs/zfs/vdev.c      |   4 +-
 .../opensolaris/uts/common/fs/zfs/zfs_acl.c   |   2 +-
 .../uts/common/fs/zfs/zfs_ctldir.c            |  50 ++--
 .../opensolaris/uts/common/fs/zfs/zfs_fuid.c  |  14 +-
 .../opensolaris/uts/common/fs/zfs/zfs_ioctl.c |  38 +--
 .../uts/common/fs/zfs/zfs_replay.c            |   6 +-
 .../uts/common/fs/zfs/zfs_vfsops.c            |  14 +-
 .../opensolaris/uts/common/fs/zfs/zfs_vnops.c |  40 +--
 .../opensolaris/uts/common/fs/zfs/zfs_znode.c |  28 +-
 .../contrib/opensolaris/uts/common/os/callb.c |   4 +-
 .../contrib/opensolaris/uts/common/os/fm.c    |  16 +-
 .../contrib/opensolaris/uts/common/sys/ctf.h  |   2 +-
 .../opensolaris/uts/common/sys/ctf_api.h      |   2 +-
 .../opensolaris/uts/common/sys/dtrace.h       |  22 +-
 .../opensolaris/uts/common/sys/dtrace_impl.h  |  12 +-
 .../opensolaris/uts/common/sys/fasttrap.h     |   2 +-
 .../uts/common/sys/fasttrap_impl.h            |   6 +-
 .../opensolaris/uts/common/sys/isa_defs.h     |   6 +-
 .../opensolaris/uts/common/sys/procset.h      |   2 +-
 .../opensolaris/uts/common/sys/sysevent.h     |  12 +-
 .../opensolaris/uts/common/sys/sysmacros.h    |   4 +-
 .../opensolaris/uts/common/sys/u8_textprep.h  |   4 +-
 .../uts/intel/dtrace/fasttrap_isa.c           |  42 +--
 sys/cddl/dev/dtrace/amd64/instr_size.c        |   6 +-
 sys/cddl/dev/dtrace/dtrace_ioctl.c            |  10 +-
 sys/cddl/dev/dtrace/i386/instr_size.c         |   6 +-
 sys/cddl/dev/dtrace/x86/regset.h              |  12 +-
 94 files changed, 746 insertions(+), 752 deletions(-)

diff --git a/cddl/contrib/opensolaris/cmd/dtrace/dtrace.c b/cddl/contrib/opensolaris/cmd/dtrace/dtrace.c
index 3a954ed40482..d8bdaa61faf4 100644
--- a/cddl/contrib/opensolaris/cmd/dtrace/dtrace.c
+++ b/cddl/contrib/opensolaris/cmd/dtrace/dtrace.c
@@ -43,11 +43,11 @@
 #include <fcntl.h>
 #include <errno.h>
 #include <signal.h>
-#if defined(sun)
+#ifdef illumos
 #include <alloca.h>
 #endif
 #include <libgen.h>
-#if defined(sun)
+#ifdef illumos
 #include <libproc.h>
 #endif
 
@@ -101,7 +101,7 @@ static int g_grabanon = 0;
 static const char *g_ofile = NULL;
 static FILE *g_ofp;
 static dtrace_hdl_t *g_dtp;
-#if defined(sun)
+#ifdef illumos
 static char *g_etcfile = "/etc/system";
 static const char *g_etcbegin = "* vvvv Added by DTrace";
 static const char *g_etcend = "* ^^^^ Added by DTrace";
@@ -211,7 +211,7 @@ fatal(const char *fmt, ...)
 static void
 dfatal(const char *fmt, ...)
 {
-#if !defined(sun) && defined(NEED_ERRLOC)
+#if !defined(illumos) && defined(NEED_ERRLOC)
 	char *p_errfile = NULL;
 	int errline = 0;
 #endif
@@ -232,7 +232,7 @@ dfatal(const char *fmt, ...)
 		(void) fprintf(stderr, "%s\n",
 		    dtrace_errmsg(g_dtp, dtrace_errno(g_dtp)));
 	}
-#if !defined(sun) && defined(NEED_ERRLOC)
+#if !defined(illumos) && defined(NEED_ERRLOC)
 	dt_get_errloc(g_dtp, &p_errfile, &errline);
 	if (p_errfile != NULL)
 		printf("File '%s', line %d\n", p_errfile, errline);
@@ -397,7 +397,7 @@ dof_prune(const char *fname)
 	free(buf);
 }
 
-#if defined(sun)
+#ifdef illumos
 static void
 etcsystem_prune(void)
 {
@@ -508,7 +508,7 @@ etcsystem_add(void)
 
 	error("added forceload directives to %s\n", g_ofile);
 }
-#endif
+#endif /* illumos */
 
 static void
 print_probe_info(const dtrace_probeinfo_t *p)
@@ -643,7 +643,7 @@ anon_prog(const dtrace_cmd_t *dcp, dof_hdr_t *dof, int n)
 	p = (uchar_t *)dof;
 	q = p + dof->dofh_loadsz;
 
-#if defined(sun)
+#ifdef illumos
 	oprintf("dof-data-%d=0x%x", n, *p++);
 
 	while (p < q)
@@ -793,7 +793,7 @@ compile_str(dtrace_cmd_t *dcp)
 static void
 prochandler(struct ps_prochandle *P, const char *msg, void *arg)
 {
-#if defined(sun)
+#ifdef illumos
 	const psinfo_t *prp = Ppsinfo(P);
 	int pid = Pstatus(P)->pr_pid;
 	char name[SIG2STR_MAX];
@@ -807,13 +807,13 @@ prochandler(struct ps_prochandle *P, const char *msg, void *arg)
 		return;
 	}
 
-#if defined(sun)
+#ifdef illumos
 	switch (Pstate(P)) {
 #else
 	switch (proc_state(P)) {
 #endif
 	case PS_UNDEAD:
-#if defined(sun)
+#ifdef illumos
 		/*
 		 * Ideally we would like to always report pr_wstat here, but it
 		 * isn't possible given current /proc semantics.  If we grabbed
@@ -831,7 +831,7 @@ prochandler(struct ps_prochandle *P, const char *msg, void *arg)
 			notice("pid %d terminated by %d\n", pid,
 			    WTERMSIG(wstatus));
 #endif
-#if defined(sun)
+#ifdef illumos
 		} else if (prp != NULL && WEXITSTATUS(prp->pr_wstat) != 0) {
 			notice("pid %d exited with status %d\n",
 			    pid, WEXITSTATUS(prp->pr_wstat));
@@ -1238,7 +1238,7 @@ installsighands(void)
 	if (sigaction(SIGTERM, NULL, &oact) == 0 && oact.sa_handler != SIG_IGN)
 		(void) sigaction(SIGTERM, &act, NULL);
 
-#if !defined(sun)
+#ifndef illumos
 	if (sigaction(SIGPIPE, NULL, &oact) == 0 && oact.sa_handler != SIG_IGN)
 		(void) sigaction(SIGPIPE, &act, NULL);
 
@@ -1720,7 +1720,7 @@ main(int argc, char *argv[])
 
 	case DMODE_ANON:
 		if (g_ofile == NULL)
-#if defined(sun)
+#ifdef illumos
 			g_ofile = "/kernel/drv/dtrace.conf";
 #else
 			/*
@@ -1732,7 +1732,7 @@ main(int argc, char *argv[])
 #endif
 
 		dof_prune(g_ofile); /* strip out any old DOF directives */
-#if defined(sun)
+#ifdef illumos
 		etcsystem_prune(); /* string out any forceload directives */
 #endif
 
@@ -1765,7 +1765,7 @@ main(int argc, char *argv[])
 		 * that itself contains a #pragma D option quiet.
 		 */
 		error("saved anonymous enabling in %s\n", g_ofile);
-#if defined(sun)
+#ifdef illumos
 		etcsystem_add();
 		error("run update_drv(1M) or reboot to enable changes\n");
 #endif
diff --git a/cddl/contrib/opensolaris/cmd/lockstat/lockstat.c b/cddl/contrib/opensolaris/cmd/lockstat/lockstat.c
index 0a609d773cf6..ad512c1c92c4 100644
--- a/cddl/contrib/opensolaris/cmd/lockstat/lockstat.c
+++ b/cddl/contrib/opensolaris/cmd/lockstat/lockstat.c
@@ -46,10 +46,9 @@
 #include <signal.h>
 #include <assert.h>
 
-#if defined(sun)
+#ifdef illumos
 #define	GETOPT_EOF	EOF
 #else
-/* FreeBSD */ 
 #include <sys/time.h>
 #include <sys/resource.h>
 
@@ -57,7 +56,7 @@
 #define	GETOPT_EOF		(-1)
 
 typedef	uintptr_t	pc_t;
-#endif /* defined(sun) */
+#endif
 
 #define	LOCKSTAT_OPTSTR	"x:bths:n:d:i:l:f:e:ckwWgCHEATID:RpPo:V"
 
@@ -214,10 +213,9 @@ static ls_event_info_t g_event_info[LS_MAX_EVENTS] = {
 	{ 'H',	"Lock",	"Unknown event (type 53)",		"units"	},
 	{ 'H',	"Lock",	"Unknown event (type 54)",		"units"	},
 	{ 'H',	"Lock",	"Unknown event (type 55)",		"units"	},
-#if defined(sun)
+#ifdef illumos
 	{ 'I',	"CPU+PIL", "Profiling interrupt",		"nsec",
 #else
-	/* FreeBSD */
 	{ 'I',	"CPU+Pri_Class", "Profiling interrupt",		"nsec",
 #endif
 	    "profile:::profile-97", NULL },
@@ -231,7 +229,7 @@ static ls_event_info_t g_event_info[LS_MAX_EVENTS] = {
 	{ 'E',	"Lock",	"Lockstat record failure",		"(N/A)"	},
 };
 
-#if !defined(sun)
+#ifndef illumos
 static char *g_pri_class[] = {
 	"",
 	"Intr",
@@ -598,7 +596,7 @@ filter_add(char **filt, char *what, uintptr_t base, uintptr_t size)
 		*filt[0] = '\0';
 	}
 
-#if defined(sun)
+#ifdef illumos
 	(void) sprintf(c, "%s(%s >= 0x%p && %s < 0x%p)", *filt[0] != '\0' ?
 	    " || " : "", what, (void *)base, what, (void *)(base + size));
 #else
@@ -676,7 +674,7 @@ dprog_addevent(int event)
 		 * the number of nanoseconds) is the number of nanoseconds
 		 * late -- and it's stored in arg2.
 		 */
-#if defined(sun)
+#ifdef illumos
 		arg0 = "(uintptr_t)curthread->t_cpu + \n"
 		    "\t    curthread->t_cpu->cpu_profile_pil";
 #else
@@ -824,7 +822,7 @@ dprog_compile()
 }
 
 static void
-#if defined(sun)
+#ifdef illumos
 status_fire(void)
 #else
 status_fire(int i)
@@ -1423,7 +1421,7 @@ main(int argc, char **argv)
 		exit(127);
 	}
 
-#if defined(sun)
+#ifdef illumos
 	while (waitpid(child, &status, WEXITED) != child)
 #else
 	while (waitpid(child, &status, 0) != child)
@@ -1468,7 +1466,7 @@ main(int argc, char **argv)
 			dfail("failed to walk aggregate");
 	}
 
-#if defined(sun)
+#ifdef illumos
 	if ((data_buf = memalign(sizeof (uint64_t),
 	    (g_nrecs + 1) * g_recsize)) == NULL)
 #else
@@ -1500,7 +1498,7 @@ main(int argc, char **argv)
 	if (g_gflag) {
 		lsrec_t *newlsp, *oldlsp;
 
-#if defined(sun)
+#ifdef illumos
 		newlsp = memalign(sizeof (uint64_t),
 		    g_nrecs_used * LS_TIME * (g_stkdepth + 1));
 #else
@@ -1664,7 +1662,7 @@ format_symbol(char *buf, uintptr_t addr, int show_size)
 	else if (symoff == 0)
 		(void) sprintf(buf, "%s", symname);
 	else if (symoff < 16 && bcmp(symname, "cpu[", 4) == 0)	/* CPU+PIL */
-#if defined(sun)
+#ifdef illumos
 		(void) sprintf(buf, "%s+%ld", symname, (long)symoff);
 #else
 		(void) sprintf(buf, "%s+%s", symname, g_pri_class[(int)symoff]);
diff --git a/cddl/contrib/opensolaris/cmd/lockstat/sym.c b/cddl/contrib/opensolaris/cmd/lockstat/sym.c
index 5940c938d96c..f3feb549c477 100644
--- a/cddl/contrib/opensolaris/cmd/lockstat/sym.c
+++ b/cddl/contrib/opensolaris/cmd/lockstat/sym.c
@@ -42,12 +42,11 @@
 #include <libelf.h>
 #include <link.h>
 #include <elf.h>
-#if defined(sun)
+#ifdef illumos
 #include <sys/machelf.h>
 
 #include <kstat.h>
 #else
-/* FreeBSD */
 #include <sys/elf.h>
 #include <sys/ksyms.h>
 #include <sys/param.h>
@@ -66,7 +65,7 @@ static syment_t *symbol_table;
 static int nsyms, maxsyms;
 static char maxsymname[64];
 
-#if defined(sun)
+#ifdef illumos
 #ifdef _ELF64
 #define	elf_getshdr elf64_getshdr
 #else
@@ -105,7 +104,7 @@ remove_symbol(uintptr_t addr)
 			sep->addr = 0;
 }
 
-#if defined(sun)
+#ifdef illumos
 static void
 fake_up_certain_popular_kernel_symbols(void)
 {
@@ -133,8 +132,7 @@ fake_up_certain_popular_kernel_symbols(void)
 	}
 	(void) kstat_close(kc);
 }
-#else
-/* FreeBSD */
+#else /* !illumos */
 static void
 fake_up_certain_popular_kernel_symbols(void)
 {
@@ -151,7 +149,7 @@ fake_up_certain_popular_kernel_symbols(void)
 		add_symbol(name, addr, sizeof (uintptr_t));
 	}
 }
-#endif /* !defined(sun) */
+#endif /* illumos */
 
 static int
 symcmp(const void *p1, const void *p2)
@@ -177,12 +175,12 @@ symtab_init(void)
 	int		fd;
 	int		i;
 	int		strindex = -1;
-#if !defined(sun)
+#ifndef illumos
 	void		*ksyms;
 	size_t		sz;
 #endif
 
-#if defined(__FreeBSD__)
+#ifndef illumos
 	if ((fd = open("/dev/ksyms", O_RDONLY)) == -1) {
 		if (errno == ENOENT && modfind("ksyms") == -1) {
 			kldload("ksyms");
@@ -196,12 +194,11 @@ symtab_init(void)
 		return (-1);
 #endif
 
-#if defined(sun)
+#ifdef illumos
 	(void) elf_version(EV_CURRENT);
 
 	elf = elf_begin(fd, ELF_C_READ, NULL);
 #else
-	/* FreeBSD */
 	/* 
 	 * XXX - libelf needs to be fixed so it will work with
 	 * non 'ordinary' files like /dev/ksyms.  The following
diff --git a/cddl/contrib/opensolaris/cmd/mdb/tools/common/die.c b/cddl/contrib/opensolaris/cmd/mdb/tools/common/die.c
index 602969e1abb3..7bfc06bf2285 100644
--- a/cddl/contrib/opensolaris/cmd/mdb/tools/common/die.c
+++ b/cddl/contrib/opensolaris/cmd/mdb/tools/common/die.c
@@ -40,7 +40,7 @@ die(char *format, ...)
 {
 	va_list ap;
 	int err = errno;
-#if !defined(sun)
+#ifndef illumos
 	const char *progname = getprogname();
 #endif
 
@@ -54,7 +54,7 @@ die(char *format, ...)
 	if (format[strlen(format) - 1] != '\n')
 		(void) fprintf(stderr, ": %s\n", strerror(err));
 
-#if defined(__FreeBSD__)
+#ifndef illumos
 	exit(0);
 #else
 	exit(1);
@@ -65,7 +65,7 @@ void
 elfdie(char *format, ...)
 {
 	va_list ap;
-#if !defined(sun)
+#ifndef illumos
 	const char *progname = getprogname();
 #endif
 
@@ -79,7 +79,7 @@ elfdie(char *format, ...)
 	if (format[strlen(format) - 1] != '\n')
 		(void) fprintf(stderr, ": %s\n", elf_errmsg(elf_errno()));
 
-#if defined(__FreeBSD__)
+#ifndef illumos
 	exit(0);
 #else
 	exit(1);
diff --git a/cddl/contrib/opensolaris/cmd/mdb/tools/common/util.h b/cddl/contrib/opensolaris/cmd/mdb/tools/common/util.h
index a0932ada0d57..737d2221f62f 100644
--- a/cddl/contrib/opensolaris/cmd/mdb/tools/common/util.h
+++ b/cddl/contrib/opensolaris/cmd/mdb/tools/common/util.h
@@ -40,7 +40,7 @@ extern int findelfsecidx(Elf *, char *);
 extern void die(char *, ...);
 extern void elfdie(char *, ...);
 
-#if defined(sun)
+#ifdef illumos
 extern const char *progname;
 #endif
 
diff --git a/cddl/contrib/opensolaris/cmd/plockstat/plockstat.c b/cddl/contrib/opensolaris/cmd/plockstat/plockstat.c
index 12884682c4a5..8dfb0ba25b81 100644
--- a/cddl/contrib/opensolaris/cmd/plockstat/plockstat.c
+++ b/cddl/contrib/opensolaris/cmd/plockstat/plockstat.c
@@ -24,7 +24,7 @@
  * Use is subject to license terms.
  */
 
-#if defined(sun)
+#ifdef illumos
 #pragma ident	"%Z%%M%	%I%	%E% SMI"
 #endif
 
@@ -505,7 +505,7 @@ getsym(struct ps_prochandle *P, uintptr_t addr, char *buf, size_t size,
 {
 	char name[256];
 	GElf_Sym sym;
-#if defined(sun)
+#ifdef illumos
 	prsyminfo_t info;
 #else
 	prmap_t *map;
@@ -518,7 +518,7 @@ getsym(struct ps_prochandle *P, uintptr_t addr, char *buf, size_t size,
 		(void) snprintf(buf, size, "%#lx", addr);
 		return (0);
 	}
-#if defined(sun)
+#ifdef illumos
 	if (info.prs_object == NULL)
 		info.prs_object = "<unknown>";
 
@@ -668,7 +668,7 @@ process_aggregate(const dtrace_aggdata_t **aggsdata, int naggvars, void *arg)
 static void
 prochandler(struct ps_prochandle *P, const char *msg, void *arg)
 {
-#if defined(sun)
+#ifdef illumos
 	const psinfo_t *prp = Ppsinfo(P);
 	int pid = Pstatus(P)->pr_pid;
 #else
@@ -773,7 +773,7 @@ intr(int signo)
 int
 main(int argc, char **argv)
 {
-#if defined(sun)
+#ifdef illumos
 	ucred_t *ucp;
 #endif
 	int err;
@@ -785,7 +785,7 @@ main(int argc, char **argv)
 
 	g_pname = basename(argv[0]);
 	argv[0] = g_pname; /* rewrite argv[0] for getopt errors */
-#if defined(sun)
+#ifdef illumos
 	/*
 	 * Make sure we have the required dtrace_proc privilege.
 	 */
@@ -988,7 +988,7 @@ main(int argc, char **argv)
 
 	if (opt_v)
 		(void) printf("%s: tracing enabled for pid %d\n", g_pname,
-#if defined(sun)
+#ifdef illumos
 		    (int)Pstatus(g_pr)->pr_pid);
 #else
 		    (int)proc_getpid(g_pr));
diff --git a/cddl/contrib/opensolaris/cmd/sgs/include/alist.h b/cddl/contrib/opensolaris/cmd/sgs/include/alist.h
index c27160bd35cc..2b790b715176 100644
--- a/cddl/contrib/opensolaris/cmd/sgs/include/alist.h
+++ b/cddl/contrib/opensolaris/cmd/sgs/include/alist.h
@@ -39,7 +39,7 @@ extern "C" {
 #endif
 
 #include <sys/types.h>
-#if defined(sun)
+#ifdef illumos
 #include <sys/machelf.h>
 #else
 #include <sys/elf.h>
diff --git a/cddl/contrib/opensolaris/cmd/sgs/include/sgs.h b/cddl/contrib/opensolaris/cmd/sgs/include/sgs.h
index 9c37af2a1d4a..adfe5be36c65 100644
--- a/cddl/contrib/opensolaris/cmd/sgs/include/sgs.h
+++ b/cddl/contrib/opensolaris/cmd/sgs/include/sgs.h
@@ -48,7 +48,7 @@ extern "C" {
 
 #ifndef	_ASM
 #include <sys/types.h>
-#if defined(sun)
+#ifdef illumos
 #include <sys/machelf.h>
 #else
 #include <elf.h>
diff --git a/cddl/contrib/opensolaris/cmd/zfs/zfs_main.c b/cddl/contrib/opensolaris/cmd/zfs/zfs_main.c
index f88318611a00..d7c702b9b567 100644
--- a/cddl/contrib/opensolaris/cmd/zfs/zfs_main.c
+++ b/cddl/contrib/opensolaris/cmd/zfs/zfs_main.c
@@ -65,7 +65,7 @@
 #include <zfs_prop.h>
 #include <zfs_deleg.h>
 #include <libuutil.h>
-#ifdef sun
+#ifdef illumos
 #include <aclutils.h>
 #include <directory.h>
 #include <idmap.h>
@@ -2391,7 +2391,7 @@ userspace_cb(void *arg, const char *domain, uid_t rid, uint64_t space)
 		/* SMB */
 		char sid[ZFS_MAXNAMELEN + 32];
 		uid_t id;
-#ifdef sun
+#ifdef illumos
 		int err;
 		int flag = IDMAP_REQ_FLG_USE_CACHE;
 #endif
@@ -2402,17 +2402,17 @@ userspace_cb(void *arg, const char *domain, uid_t rid, uint64_t space)
 
 		if (prop == ZFS_PROP_GROUPUSED || prop == ZFS_PROP_GROUPQUOTA) {
 			type = USTYPE_SMB_GRP;
-#ifdef sun
+#ifdef illumos
 			err = sid_to_id(sid, B_FALSE, &id);
 #endif
 		} else {
 			type = USTYPE_SMB_USR;
-#ifdef sun
+#ifdef illumos
 			err = sid_to_id(sid, B_TRUE, &id);
 #endif
 		}
 
-#ifdef sun
+#ifdef illumos
 		if (err == 0) {
 			rid = id;
 			if (!cb->cb_sid2posix) {
@@ -6110,7 +6110,7 @@ unshare_unmount_path(int op, char *path, int flags, boolean_t is_manual)
 	/*
 	 * Search for the given (major,minor) pair in the mount table.
 	 */
-#ifdef sun
+#ifdef illumos
 	rewind(mnttab_file);
 	while ((ret = getextmntent(mnttab_file, &entry, 0)) == 0) {
 		if (entry.mnt_major == major(statbuf.st_dev) &&
diff --git a/cddl/contrib/opensolaris/cmd/zpool/zpool_vdev.c b/cddl/contrib/opensolaris/cmd/zpool/zpool_vdev.c
index e974b7519b02..efd828f49f36 100644
--- a/cddl/contrib/opensolaris/cmd/zpool/zpool_vdev.c
+++ b/cddl/contrib/opensolaris/cmd/zpool/zpool_vdev.c
@@ -112,7 +112,7 @@ vdev_error(const char *fmt, ...)
 	va_end(ap);
 }
 
-#ifdef sun
+#ifdef illumos
 static void
 libdiskmgt_error(int error)
 {
@@ -274,7 +274,7 @@ check_device(const char *path, boolean_t force, boolean_t isspare)
 
 	return (check_slice(path, force, B_FALSE, isspare));
 }
-#endif	/* sun */
+#endif	/* illumos */
 
 /*
  * Check that a file is valid.  All we can do in this case is check that it's
@@ -290,7 +290,7 @@ check_file(const char *file, boolean_t force, boolean_t isspare)
 	pool_state_t state;
 	boolean_t inuse;
 
-#ifdef sun
+#ifdef illumos
 	if (dm_inuse_swap(file, &err)) {
 		if (err)
 			libdiskmgt_error(err);
@@ -377,7 +377,7 @@ check_device(const char *name, boolean_t force, boolean_t isspare)
 static boolean_t
 is_whole_disk(const char *arg)
 {
-#ifdef sun
+#ifdef illumos
 	struct dk_gpt *label;
 	int	fd;
 	char	path[MAXPATHLEN];
@@ -915,7 +915,7 @@ check_replication(nvlist_t *config, nvlist_t *newroot)
 	return (ret);
 }
 
-#ifdef sun
+#ifdef illumos
 /*
  * Go through and find any whole disks in the vdev specification, labelling them
  * as appropriate.  When constructing the vdev spec, we were unable to open this
@@ -1019,7 +1019,7 @@ make_disks(zpool_handle_t *zhp, nvlist_t *nv)
 
 	return (0);
 }
-#endif	/* sun */
+#endif	/* illumos */
 
 /*
  * Determine if the given path is a hot spare within the given configuration.
@@ -1098,7 +1098,7 @@ is_device_in_use(nvlist_t *config, nvlist_t *nv, boolean_t force,
 		 * regardless of what libdiskmgt or zpool_in_use() says.
 		 */
 		if (replacing) {
-#ifdef sun
+#ifdef illumos
 			if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK,
 			    &wholedisk) == 0 && wholedisk)
 				(void) snprintf(buf, sizeof (buf), "%ss0",
@@ -1422,7 +1422,7 @@ split_mirror_vdev(zpool_handle_t *zhp, char *newname, nvlist_t *props,
 			return (NULL);
 		}
 
-#ifdef sun
+#ifdef illumos
 		if (!flags.dryrun && make_disks(zhp, newroot) != 0) {
 			nvlist_free(newroot);
 			return (NULL);
@@ -1507,7 +1507,7 @@ make_root_vdev(zpool_handle_t *zhp, int force, int check_rep,
 		return (NULL);
 	}
 
-#ifdef sun
+#ifdef illumos
 	/*
 	 * Run through the vdev specification and label any whole disks found.
 	 */
diff --git a/cddl/contrib/opensolaris/common/util/strtolctype.h b/cddl/contrib/opensolaris/common/util/strtolctype.h
index a1d18367d345..91609cede4e1 100644
--- a/cddl/contrib/opensolaris/common/util/strtolctype.h
+++ b/cddl/contrib/opensolaris/common/util/strtolctype.h
@@ -44,7 +44,7 @@ extern "C" {
  * safe in probe context.
  */
 
-#if defined(sun) &&	(defined(_KERNEL) || defined(_BOOT))
+#if defined(illumos) && (defined(_KERNEL) || defined(_BOOT))
 
 #define	isalnum(ch)	(isalpha(ch) || isdigit(ch))
 #define	isalpha(ch)	(isupper(ch) || islower(ch))
diff --git a/cddl/contrib/opensolaris/lib/libctf/common/ctf_lib.c b/cddl/contrib/opensolaris/lib/libctf/common/ctf_lib.c
index 58222670f4ff..b9f512d37739 100644
--- a/cddl/contrib/opensolaris/lib/libctf/common/ctf_lib.c
+++ b/cddl/contrib/opensolaris/lib/libctf/common/ctf_lib.c
@@ -34,14 +34,14 @@
 #include <unistd.h>
 #include <fcntl.h>
 #include <errno.h>
-#if defined(sun)
+#ifdef illumos
 #include <dlfcn.h>
 #else
 #include <zlib.h>
 #endif
 #include <gelf.h>
 
-#if defined(sun)
+#ifdef illumos
 #ifdef _LP64
 static const char *_libctf_zlib = "/usr/lib/64/libz.so";
 #else
@@ -58,7 +58,7 @@ static struct {
 static size_t _PAGESIZE;
 static size_t _PAGEMASK;
 
-#if defined(sun)
+#ifdef illumos
 #pragma init(_libctf_init)
 #else
 void    _libctf_init(void) __attribute__ ((constructor));
@@ -66,7 +66,7 @@ void    _libctf_init(void) __attribute__ ((constructor));
 void
 _libctf_init(void)
 {
-#if defined(sun)
+#ifdef illumos
 	const char *p = getenv("LIBCTF_DECOMPRESSOR");
 
 	if (p != NULL)
@@ -87,7 +87,7 @@ _libctf_init(void)
 void *
 ctf_zopen(int *errp)
 {
-#if defined(sun)
+#ifdef illumos
 	ctf_dprintf("decompressing CTF data using %s\n", _libctf_zlib);
 
 	if (zlib.z_dlp != NULL)
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/drti.c b/cddl/contrib/opensolaris/lib/libdtrace/common/drti.c
index 6f3c9c7d3de9..fdfe416804fc 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/drti.c
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/drti.c
@@ -56,13 +56,13 @@
  */
 
 static const char *devnamep = "/dev/dtrace/helper";
-#if defined(sun)
+#ifdef illumos
 static const char *olddevname = "/devices/pseudo/dtrace@0:helper";
 #endif
 
 static const char *modname;	/* Name of this load object */
 static int gen;			/* DOF helper generation */
-#if defined(sun)
+#ifdef illumos
 extern dof_hdr_t __SUNW_dof;	/* DOF defined in the .SUNW_dof section */
 #endif
 static boolean_t dof_init_debug = B_FALSE;	/* From DTRACE_DOF_INIT_DEBUG */
@@ -90,7 +90,7 @@ dprintf(int debug, const char *fmt, ...)
 	va_end(ap);
 }
 
-#if defined(sun)
+#ifdef illumos
 #pragma init(dtrace_dof_init)
 #else
 static void dtrace_dof_init(void) __attribute__ ((constructor));
@@ -99,7 +99,7 @@ static void dtrace_dof_init(void) __attribute__ ((constructor));
 static void
 dtrace_dof_init(void)
 {
-#if defined(sun)
+#ifdef illumos
 	dof_hdr_t *dof = &__SUNW_dof;
 #else
 	dof_hdr_t *dof = NULL;
@@ -111,14 +111,14 @@ dtrace_dof_init(void)
 #endif
 	dof_helper_t dh;
 	Link_map *lmp = NULL;
-#if defined(sun)
+#ifdef illumos
 	Lmid_t lmid;
 #else
 	u_long lmid = 0;
 #endif
 	int fd;
 	const char *p;
-#if !defined(sun)
+#ifndef illumos
 	Elf *e;
 	Elf_Scn *scn = NULL;
 	Elf_Data *dofdata = NULL;
@@ -141,7 +141,7 @@ dtrace_dof_init(void)
 		return;
 	}
 
-#if defined(sun)
+#ifdef illumos
 	if (dlinfo(RTLD_SELF, RTLD_DI_LMID, &lmid) == -1) {
 		dprintf(1, "couldn't discover link map ID\n");
 		return;
@@ -152,7 +152,7 @@ dtrace_dof_init(void)
 		modname = lmp->l_name;
 	else
 		modname++;
-#if !defined(sun)
+#ifndef illumos
 	elf_version(EV_CURRENT);
 	if ((efd = open(lmp->l_name, O_RDONLY, 0)) < 0) {
 		dprintf(1, "couldn't open file for reading\n");
@@ -215,7 +215,7 @@ dtrace_dof_init(void)
 
 	if ((fd = open64(devnamep, O_RDWR)) < 0) {
 		dprintf(1, "failed to open helper device %s", devnamep);
-#if defined(sun)
+#ifdef illumos
 		/*
 		 * If the device path wasn't explicitly set, try again with
 		 * the old device path.
@@ -237,14 +237,14 @@ dtrace_dof_init(void)
 		dprintf(1, "DTrace ioctl failed for DOF at %p", dof);
 	else {
 		dprintf(1, "DTrace ioctl succeeded for DOF at %p\n", dof);
-#if !defined(sun)
+#ifndef illumos
 		gen = dh.gen;
 #endif
 	}
 
 	(void) close(fd);
 
-#if !defined(sun)
+#ifndef illumos
 		/* End of while loop */
 		dof = dof_next;
 	}
@@ -254,7 +254,7 @@ dtrace_dof_init(void)
 #endif
 }
 
-#if defined(sun)
+#ifdef illumos
 #pragma fini(dtrace_dof_fini)
 #else
 static void dtrace_dof_fini(void) __attribute__ ((destructor));
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_aggregate.c b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_aggregate.c
index 6b571fafdd04..5ea55a05faf0 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_aggregate.c
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_aggregate.c
@@ -35,7 +35,7 @@
 #include <unistd.h>
 #include <dt_impl.h>
 #include <assert.h>
-#if defined(sun)
+#ifdef illumos
 #include <alloca.h>
 #else
 #include <sys/sysctl.h>
@@ -453,7 +453,7 @@ dt_aggregate_snap_cpu(dtrace_hdl_t *dtp, processorid_t cpu)
 
 	buf->dtbd_cpu = cpu;
 
-#if defined(sun)
+#ifdef illumos
 	if (dt_ioctl(dtp, DTRACEIOC_AGGSNAP, buf) == -1) {
 #else
 	if (dt_ioctl(dtp, DTRACEIOC_AGGSNAP, &buf) == -1) {
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_cc.c b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_cc.c
index 35b8f0289b9f..84f8661e3fb4 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_cc.c
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_cc.c
@@ -1888,7 +1888,7 @@ dt_preproc(dtrace_hdl_t *dtp, FILE *ifp)
 	char **argv = malloc(sizeof (char *) * (argc + 5));
 	FILE *ofp = tmpfile();
 
-#if defined(sun)
+#ifdef illumos
 	char ipath[20], opath[20]; /* big enough for /dev/fd/ + INT_MAX + \0 */
 #endif
 	char verdef[32]; /* big enough for -D__SUNW_D_VERSION=0x%08x + \0 */
@@ -1898,7 +1898,7 @@ dt_preproc(dtrace_hdl_t *dtp, FILE *ifp)
 
 	int wstat, estat;
 	pid_t pid;
-#if defined(sun)
+#ifdef illumos
 	off64_t off;
 #else
 	off_t off = 0;
@@ -1929,7 +1929,7 @@ dt_preproc(dtrace_hdl_t *dtp, FILE *ifp)
 		(void) fseeko64(ifp, off, SEEK_SET);
 	}
 
-#if defined(sun)
+#ifdef illumos
 	(void) snprintf(ipath, sizeof (ipath), "/dev/fd/%d", fileno(ifp));
 	(void) snprintf(opath, sizeof (opath), "/dev/fd/%d", fileno(ofp));
 #endif
@@ -1940,7 +1940,7 @@ dt_preproc(dtrace_hdl_t *dtp, FILE *ifp)
 	    "-D__SUNW_D_VERSION=0x%08x", dtp->dt_vmax);
 	argv[argc++] = verdef;
 
-#if defined(sun)
+#ifdef illumos
 	switch (dtp->dt_stdcmode) {
 	case DT_STDC_XA:
 	case DT_STDC_XT:
@@ -1982,7 +1982,7 @@ dt_preproc(dtrace_hdl_t *dtp, FILE *ifp)
 	}
 
 	if (pid == 0) {
-#if !defined(sun)
+#ifndef illumos
 		if (isatty(fileno(ifp)) == 0)
 			lseek(fileno(ifp), off, SEEK_SET);
 		dup2(fileno(ifp), 0);
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_consume.c b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_consume.c
index 072cb0558813..7eae3986e93a 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_consume.c
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_consume.c
@@ -35,12 +35,12 @@
 #include <limits.h>
 #include <assert.h>
 #include <ctype.h>
-#if defined(sun)
+#ifdef illumos
 #include <alloca.h>
 #endif
 #include <dt_impl.h>
 #include <dt_pq.h>
-#if !defined(sun)
+#ifndef illumos
 #include <libproc_compat.h>
 #endif
 
@@ -2958,7 +2958,7 @@ dt_get_buf(dtrace_hdl_t *dtp, int cpu, dtrace_bufdesc_t **bufp)
 	buf->dtbd_size = size;
 	buf->dtbd_cpu = cpu;
 
-#if defined(sun)
+#ifdef illumos
 	if (dt_ioctl(dtp, DTRACEIOC_BUFSNAP, buf) == -1) {
 #else
 	if (dt_ioctl(dtp, DTRACEIOC_BUFSNAP, &buf) == -1) {
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_dof.c b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_dof.c
index 0b531c5e6883..a4e325671f9f 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_dof.c
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_dof.c
@@ -26,12 +26,12 @@
  */
 
 #include <sys/types.h>
-#if defined(sun)
+#ifdef illumos
 #include <sys/sysmacros.h>
 #endif
 
 #include <strings.h>
-#if defined(sun)
+#ifdef illumos
 #include <alloca.h>
 #endif
 #include <assert.h>
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_error.c b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_error.c
index 2327ff75e4d4..339e2de5d150 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_error.c
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_error.c
@@ -145,7 +145,7 @@ dtrace_errno(dtrace_hdl_t *dtp)
 	return (dtp->dt_errno);
 }
 
-#if defined(sun)
+#ifdef illumos
 int
 dt_set_errno(dtrace_hdl_t *dtp, int err)
 {
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_handle.c b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_handle.c
index fe1ec7a80f71..f26126bba517 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_handle.c
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_handle.c
@@ -31,7 +31,7 @@
 #include <errno.h>
 #include <unistd.h>
 #include <assert.h>
-#if defined(sun)
+#ifdef illumos
 #include <alloca.h>
 #endif
 
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_ident.c b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_ident.c
index 5a2f0e4c1f5c..b9164ac26cf9 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_ident.c
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_ident.c
@@ -28,18 +28,18 @@
 
 #pragma ident	"%Z%%M%	%I%	%E% SMI"
 
-#if defined(sun)
+#ifdef illumos
 #include <sys/sysmacros.h>
 #endif
 #include <strings.h>
 #include <stdlib.h>
-#if defined(sun)
+#ifdef illumos
 #include <alloca.h>
 #endif
 #include <assert.h>
 #include <errno.h>
 #include <ctype.h>
-#if defined(sun)
+#ifdef illumos
 #include <sys/procfs_isa.h>
 #endif
 #include <limits.h>
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_impl.h b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_impl.h
index 8cf5fe2d140b..c9e8e20d0b71 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_impl.h
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_impl.h
@@ -34,7 +34,7 @@
 
 #include <sys/param.h>
 #include <sys/objfs.h>
-#if !defined(sun)
+#ifndef illumos
 #include <sys/bitmap.h>
 #include <sys/utsname.h>
 #include <sys/ioccom.h>
@@ -45,7 +45,7 @@
 #include <libctf.h>
 #include <dtrace.h>
 #include <gelf.h>
-#if defined(sun)
+#ifdef illumos
 #include <synch.h>
 #endif
 
@@ -142,7 +142,7 @@ typedef struct dt_module {
 	GElf_Addr dm_bss_va;	/* virtual address of BSS */
 	GElf_Xword dm_bss_size;	/* size in bytes of BSS */
 	dt_idhash_t *dm_extern;	/* external symbol definitions */
-#if !defined(sun)
+#ifndef illumos
 	caddr_t dm_reloc_offset;	/* Symbol relocation offset. */
 	uintptr_t *dm_sec_offsets;
 #endif
@@ -296,7 +296,7 @@ struct dtrace_hdl {
 	int dt_version;		/* library version requested by client */
 	int dt_ctferr;		/* error resulting from last CTF failure */
 	int dt_errno;		/* error resulting from last failed operation */
-#if !defined(sun)
+#ifndef illumos
 	const char *dt_errfile;
 	int dt_errline;
 #endif
@@ -305,7 +305,7 @@ struct dtrace_hdl {
 	int dt_fterr;		/* saved errno from failed open of dt_ftfd */
 	int dt_cdefs_fd;	/* file descriptor for C CTF debugging cache */
 	int dt_ddefs_fd;	/* file descriptor for D CTF debugging cache */
-#if defined(sun)
+#ifdef illumos
 	int dt_stdout_fd;	/* file descriptor for saved stdout */
 #else
 	FILE *dt_freopen_fp;	/* file pointer for freopened stdout */
@@ -596,7 +596,7 @@ extern int dt_version_defined(dt_version_t);
 extern char *dt_cpp_add_arg(dtrace_hdl_t *, const char *);
 extern char *dt_cpp_pop_arg(dtrace_hdl_t *);
 
-#if defined(sun)
+#ifdef illumos
 extern int dt_set_errno(dtrace_hdl_t *, int);
 #else
 int _dt_set_errno(dtrace_hdl_t *, int, const char *, int);
@@ -606,7 +606,7 @@ void dt_get_errloc(dtrace_hdl_t *, const char **, int *);
 extern void dt_set_errmsg(dtrace_hdl_t *, const char *, const char *,
     const char *, int, const char *, va_list);
 
-#if defined(sun)
+#ifdef illumos
 extern int dt_ioctl(dtrace_hdl_t *, int, void *);
 #else
 extern int dt_ioctl(dtrace_hdl_t *, u_long, void *);
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_lex.l b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_lex.l
index 032d3034d67a..925f8a5875e9 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_lex.l
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_lex.l
@@ -44,7 +44,7 @@
  * We need to undefine lex's input and unput macros so that references to these
  * call the functions provided at the end of this source file.
  */
-#if defined(sun)
+#ifdef illumos
 #undef input
 #undef unput
 #else
@@ -79,7 +79,7 @@
 #endif
 
 static int id_or_type(const char *);
-#if defined(sun)
+#ifdef illumos
 static int input(void);
 static void unput(int);
 #endif
@@ -740,7 +740,7 @@ yyinit(dt_pcb_t *pcb)
 	yypcb = pcb;
 	yylineno = 1;
 	yypragma = NULL;
-#if defined(sun)
+#ifdef illumos
 	yysptr = yysbuf;
 #endif
 }
@@ -838,7 +838,7 @@ id_or_type(const char *s)
 	return (ttok);
 }
 
-#if defined(sun)
+#ifdef illumos
 static int
 input(void)
 {
@@ -880,4 +880,4 @@ unput(int c)
 	*yysptr++ = c;
 	yytchar = c;
 }
-#endif
+#endif /* illumos */
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_link.c b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_link.c
index 771f1ae287b6..3991714086a7 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_link.c
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_link.c
@@ -30,7 +30,7 @@
 #include <elf.h>
 
 #include <sys/types.h>
-#if defined(sun)
+#ifdef illumos
 #include <sys/sysmacros.h>
 #else
 #define	P2ROUNDUP(x, align)		(-(-(x) & -(align)))
@@ -38,7 +38,7 @@
 
 #include <unistd.h>
 #include <strings.h>
-#if defined(sun)
+#ifdef illumos
 #include <alloca.h>
 #endif
 #include <limits.h>
@@ -47,7 +47,7 @@
 #include <stdio.h>
 #include <fcntl.h>
 #include <errno.h>
-#if defined(sun)
+#ifdef illumos
 #include <wait.h>
 #else
 #include <sys/wait.h>
@@ -322,7 +322,7 @@ prepare_elf64(dtrace_hdl_t *dtp, const dof_hdr_t *dof, dof_elf64_t *dep)
 	char *strtab;
 	int i, j, nrel;
 	size_t strtabsz = 1;
-#if defined(sun)
+#ifdef illumos
 	uint32_t count = 0;
 #else
 	uint64_t count = 0;
@@ -434,7 +434,7 @@ prepare_elf64(dtrace_hdl_t *dtp, const dof_hdr_t *dof, dof_elf64_t *dep)
 #elif defined(__i386) || defined(__amd64)
 			rel->r_offset = s->dofs_offset +
 			    dofr[j].dofr_offset;
-#if defined(sun)
+#ifdef illumos
 			rel->r_info = ELF64_R_INFO(count + dep->de_global,
 			    R_AMD64_64);
 #else
@@ -711,7 +711,7 @@ dump_elf64(dtrace_hdl_t *dtp, const dof_hdr_t *dof, int fd)
 
 	shp = &elf_file.shdr[ESHDR_DOF];
 	shp->sh_name = 11; /* DTRACE_SHSTRTAB64[11] = ".SUNW_dof" */
-#if defined(sun)
+#ifdef illumos
 	shp->sh_flags = SHF_ALLOC;
 #else
 	shp->sh_flags = SHF_WRITE | SHF_ALLOC;
@@ -1613,7 +1613,7 @@ process_obj(dtrace_hdl_t *dtp, const char *obj, int *eprobesp)
 				return (dt_link_error(dtp, elf, fd, bufs,
 				    "failed to allocate space for probe"));
 			}
-#if !defined(sun)
+#ifndef illumos
 			/*
 			 * Our linker doesn't understand the SUNW_IGNORE ndx and
 			 * will try to use this relocation when we build the
@@ -1647,7 +1647,7 @@ process_obj(dtrace_hdl_t *dtp, const char *obj, int *eprobesp)
 			 * already been processed by an earlier link
 			 * invocation.
 			 */
-#if !defined(sun)
+#ifndef illumos
 #define SHN_SUNW_IGNORE	SHN_ABS
 #endif
 			if (rsym.st_shndx != SHN_SUNW_IGNORE) {
@@ -1663,7 +1663,7 @@ process_obj(dtrace_hdl_t *dtp, const char *obj, int *eprobesp)
 	(void) elf_end(elf);
 	(void) close(fd);
 
-#if !defined(sun)
+#ifndef illumos
 	if (nsym > 0)
 #endif
 	while ((pair = bufs) != NULL) {
@@ -1684,7 +1684,7 @@ int
 dtrace_program_link(dtrace_hdl_t *dtp, dtrace_prog_t *pgp, uint_t dflags,
     const char *file, int objc, char *const objv[])
 {
-#if !defined(sun)
+#ifndef illumos
 	char tfile[PATH_MAX];
 #endif
 	char drti[PATH_MAX];
@@ -1694,7 +1694,7 @@ dtrace_program_link(dtrace_hdl_t *dtp, dtrace_prog_t *pgp, uint_t dflags,
 	size_t len;
 	int eprobes = 0, ret = 0;
 
-#if !defined(sun)
+#ifndef illumos
 	if (access(file, R_OK) == 0) {
 		fprintf(stderr, "dtrace: target object (%s) already exists. "
 		    "Please remove the target\ndtrace: object and rebuild all "
@@ -1770,7 +1770,7 @@ dtrace_program_link(dtrace_hdl_t *dtp, dtrace_prog_t *pgp, uint_t dflags,
 	if ((dof = dtrace_dof_create(dtp, pgp, dflags)) == NULL)
 		return (-1); /* errno is set for us */
 
-#if defined(sun)
+#ifdef illumos
 	/*
 	 * Create a temporary file and then unlink it if we're going to
 	 * combine it with drti.o later.  We can still refer to it in child
@@ -1816,7 +1816,7 @@ dtrace_program_link(dtrace_hdl_t *dtp, dtrace_prog_t *pgp, uint_t dflags,
 	}
 
 
-#if defined(sun)
+#ifdef illumos
 	if (!dtp->dt_lazyload)
 		(void) unlink(file);
 #endif
@@ -1826,7 +1826,7 @@ dtrace_program_link(dtrace_hdl_t *dtp, dtrace_prog_t *pgp, uint_t dflags,
 	else
 		status = dump_elf32(dtp, dof, fd);
 
-#if defined(sun)
+#ifdef illumos
 	if (status != 0 || lseek(fd, 0, SEEK_SET) != 0) {
 		return (dt_link_error(dtp, NULL, -1, NULL,
 		    "failed to write %s: %s", file, strerror(errno)));
@@ -1839,7 +1839,7 @@ dtrace_program_link(dtrace_hdl_t *dtp, dtrace_prog_t *pgp, uint_t dflags,
 #endif
 
 	if (!dtp->dt_lazyload) {
-#if defined(sun)
+#ifdef illumos
 		const char *fmt = "%s -o %s -r -Blocal -Breduce /dev/fd/%d %s";
 
 		if (dtp->dt_oflags & DTRACE_O_LP64) {
@@ -1912,7 +1912,7 @@ dtrace_program_link(dtrace_hdl_t *dtp, dtrace_prog_t *pgp, uint_t dflags,
 done:
 	dtrace_dof_destroy(dtp, dof);
 
-#if !defined(sun)
+#ifndef illumos
 	unlink(tfile);
 #endif
 	return (ret);
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_map.c b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_map.c
index 6ab7cd9619c3..20081edfe75a 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_map.c
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_map.c
@@ -156,7 +156,7 @@ dt_epid_add(dtrace_hdl_t *dtp, dtrace_epid_t id)
 	enabled->dtepd_epid = id;
 	enabled->dtepd_nrecs = 1;
 
-#if defined(sun)
+#ifdef illumos
 	if (dt_ioctl(dtp, DTRACEIOC_EPROBE, enabled) == -1) {
 #else
 	if (dt_ioctl(dtp, DTRACEIOC_EPROBE, &enabled) == -1) {
@@ -180,7 +180,7 @@ dt_epid_add(dtrace_hdl_t *dtp, dtrace_epid_t id)
 		if ((enabled = nenabled) == NULL)
 			return (dt_set_errno(dtp, EDT_NOMEM));
 
-#if defined(sun)
+#ifdef illumos
 		rval = dt_ioctl(dtp, DTRACEIOC_EPROBE, enabled);
 #else
 		rval = dt_ioctl(dtp, DTRACEIOC_EPROBE, &enabled);
@@ -356,7 +356,7 @@ dt_aggid_add(dtrace_hdl_t *dtp, dtrace_aggid_t id)
 		agg->dtagd_id = id;
 		agg->dtagd_nrecs = 1;
 
-#if defined(sun)
+#ifdef illumos
 		if (dt_ioctl(dtp, DTRACEIOC_AGGDESC, agg) == -1) {
 #else
 		if (dt_ioctl(dtp, DTRACEIOC_AGGDESC, &agg) == -1) {
@@ -379,7 +379,7 @@ dt_aggid_add(dtrace_hdl_t *dtp, dtrace_aggid_t id)
 			if ((agg = nagg) == NULL)
 				return (dt_set_errno(dtp, EDT_NOMEM));
 
-#if defined(sun)
+#ifdef illumos
 			rval = dt_ioctl(dtp, DTRACEIOC_AGGDESC, agg);
 #else
 			rval = dt_ioctl(dtp, DTRACEIOC_AGGDESC, &agg);
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_module.c b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_module.c
index 9dd52b53263d..b3fe51669cc0 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_module.c
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_module.c
@@ -27,7 +27,7 @@
  */
 
 #include <sys/types.h>
-#if defined(sun)
+#ifdef illumos
 #include <sys/modctl.h>
 #include <sys/kobj.h>
 #include <sys/kobj_impl.h>
@@ -41,7 +41,7 @@
 #endif
 
 #include <unistd.h>
-#if defined(sun)
+#ifdef illumos
 #include <project.h>
 #endif
 #include <strings.h>
@@ -51,7 +51,7 @@
 #include <assert.h>
 #include <errno.h>
 #include <dirent.h>
-#if !defined(sun)
+#ifndef illumos
 #include <fcntl.h>
 #include <libproc_compat.h>
 #endif
@@ -572,7 +572,7 @@ dt_module_load_sect(dtrace_hdl_t *dtp, dt_module_t *dmp, ctf_sect_t *ctsp)
 	if (sp == NULL || (dp = elf_getdata(sp, NULL)) == NULL)
 		return (0);
 
-#if defined(sun)
+#ifdef illumos
 	ctsp->cts_data = dp->d_buf;
 #else
 	if ((ctsp->cts_data = malloc(dp->d_size)) == NULL)
@@ -921,7 +921,7 @@ dt_module_unload(dtrace_hdl_t *dtp, dt_module_t *dmp)
 	ctf_close(dmp->dm_ctfp);
 	dmp->dm_ctfp = NULL;
 
-#if !defined(sun)
+#ifndef illumos
 	if (dmp->dm_ctdata.cts_data != NULL) {
 		free(dmp->dm_ctdata.cts_data);
 	}
@@ -1115,7 +1115,7 @@ dt_module_getctflib(dtrace_hdl_t *dtp, dt_module_t *dmp, const char *name)
  * including the path.
  */
 static void
-#if defined(sun)
+#ifdef illumos
 dt_module_update(dtrace_hdl_t *dtp, const char *name)
 #else
 dt_module_update(dtrace_hdl_t *dtp, struct kld_file_stat *k_stat)
@@ -1132,7 +1132,7 @@ dt_module_update(dtrace_hdl_t *dtp, struct kld_file_stat *k_stat)
 	Elf_Data *dp;
 	Elf_Scn *sp;
 
-#if defined(sun)
+#ifdef illumos
 	(void) snprintf(fname, sizeof (fname),
 	    "%s/%s/object", OBJFS_ROOT, name);
 #else
@@ -1242,7 +1242,7 @@ dt_module_update(dtrace_hdl_t *dtp, struct kld_file_stat *k_stat)
 	}
 
 	dmp->dm_flags |= DT_DM_KERNEL;
-#if defined(sun)
+#ifdef illumos
 	dmp->dm_modid = (int)OBJFS_MODID(st.st_ino);
 #else
 	/*
@@ -1265,7 +1265,7 @@ dt_module_update(dtrace_hdl_t *dtp, struct kld_file_stat *k_stat)
 		}
 	}
 #endif
-#endif
+#endif /* illumos */
 
 	if (dmp->dm_info.objfs_info_primary)
 		dmp->dm_flags |= DT_DM_PRIMARY;
@@ -1291,7 +1291,7 @@ dtrace_update(dtrace_hdl_t *dtp)
 	    dmp != NULL; dmp = dt_list_next(dmp))
 		dt_module_unload(dtp, dmp);
 
-#if defined(sun)
+#ifdef illumos
 	/*
 	 * Open /system/object and attempt to create a libdtrace module for
 	 * each kernel module that is loaded on the current system.
@@ -1331,11 +1331,11 @@ dtrace_update(dtrace_hdl_t *dtp)
 	dt_idhash_lookup(dtp->dt_macros, "pid")->di_id = getpid();
 	dt_idhash_lookup(dtp->dt_macros, "pgid")->di_id = getpgid(0);
 	dt_idhash_lookup(dtp->dt_macros, "ppid")->di_id = getppid();
-#if defined(sun)
+#ifdef illumos
 	dt_idhash_lookup(dtp->dt_macros, "projid")->di_id = getprojid();
 #endif
 	dt_idhash_lookup(dtp->dt_macros, "sid")->di_id = getsid(0);
-#if defined(sun)
+#ifdef illumos
 	dt_idhash_lookup(dtp->dt_macros, "taskid")->di_id = gettaskid();
 #endif
 	dt_idhash_lookup(dtp->dt_macros, "uid")->di_id = getuid();
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_open.c b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_open.c
index 0eb2a2cdcc2f..b8b146732a89 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_open.c
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_open.c
@@ -26,11 +26,10 @@
  */
 
 #include <sys/types.h>
-#if defined(sun)
+#ifdef illumos
 #include <sys/modctl.h>
 #include <sys/systeminfo.h>
 #else
-/* FreeBSD */
 #include <sys/param.h>
 #include <sys/module.h>
 #include <sys/linker.h>
@@ -39,7 +38,7 @@
 
 #include <libelf.h>
 #include <strings.h>
-#if defined(sun)
+#ifdef illumos
 #include <alloca.h>
 #endif
 #include <limits.h>
@@ -60,7 +59,7 @@
 #include <dt_printf.h>
 #include <dt_string.h>
 #include <dt_provider.h>
-#if !defined(sun)
+#ifndef illumos
 #include <sys/sysctl.h>
 #include <string.h>
 #endif
@@ -164,7 +163,7 @@ const dt_version_t _dtrace_versions[] = {
 /*
  * Global variables that are formatted on FreeBSD based on the kernel file name.
  */
-#if !defined(sun)
+#ifndef illumos
 static char	curthread_str[MAXPATHLEN];
 static char	intmtx_str[MAXPATHLEN];
 static char	threadmtx_str[MAXPATHLEN];
@@ -246,7 +245,7 @@ static const dt_ident_t _dtrace_globals[] = {
 { "curthread", DT_IDENT_SCALAR, 0, DIF_VAR_CURTHREAD,
 	{ DTRACE_STABILITY_STABLE, DTRACE_STABILITY_PRIVATE,
 	DTRACE_CLASS_COMMON }, DT_VERS_1_0,
-#if defined(sun)
+#ifdef illumos
 	&dt_idops_type, "genunix`kthread_t *" },
 #else
 	&dt_idops_type, curthread_str },
@@ -297,13 +296,13 @@ static const dt_ident_t _dtrace_globals[] = {
 { "index", DT_IDENT_FUNC, 0, DIF_SUBR_INDEX, DT_ATTR_STABCMN, DT_VERS_1_1,
 	&dt_idops_func, "int(const char *, const char *, [int])" },
 { "inet_ntoa", DT_IDENT_FUNC, 0, DIF_SUBR_INET_NTOA, DT_ATTR_STABCMN,
-#if defined(sun)
+#ifdef illumos
 	DT_VERS_1_5, &dt_idops_func, "string(ipaddr_t *)" },
 #else
 	DT_VERS_1_5, &dt_idops_func, "string(in_addr_t *)" },
 #endif
 { "inet_ntoa6", DT_IDENT_FUNC, 0, DIF_SUBR_INET_NTOA6, DT_ATTR_STABCMN,
-#if defined(sun)
+#ifdef illumos
 	DT_VERS_1_5, &dt_idops_func, "string(in6_addr_t *)" },
 #else
 	DT_VERS_1_5, &dt_idops_func, "string(struct in6_addr *)" },
@@ -328,7 +327,7 @@ static const dt_ident_t _dtrace_globals[] = {
 	&dt_idops_func, "void(@)" },
 { "memref", DT_IDENT_FUNC, 0, DIF_SUBR_MEMREF, DT_ATTR_STABCMN, DT_VERS_1_1,
 	&dt_idops_func, "uintptr_t *(void *, size_t)" },
-#if !defined(sun)
+#ifndef illumos
 { "memstr", DT_IDENT_FUNC, 0, DIF_SUBR_MEMSTR, DT_ATTR_STABCMN, DT_VERS_1_0,
 	&dt_idops_func, "string(void *, char, size_t)" },
 #endif
@@ -342,7 +341,7 @@ static const dt_ident_t _dtrace_globals[] = {
 { "msgsize", DT_IDENT_FUNC, 0, DIF_SUBR_MSGSIZE,
 	DT_ATTR_STABCMN, DT_VERS_1_0,
 	&dt_idops_func, "size_t(mblk_t *)" },
-#if defined(sun)
+#ifdef illumos
 { "mutex_owned", DT_IDENT_FUNC, 0, DIF_SUBR_MUTEX_OWNED,
 	DT_ATTR_EVOLCMN, DT_VERS_1_0,
 	&dt_idops_func, "int(genunix`kmutex_t *)" },
@@ -413,7 +412,7 @@ static const dt_ident_t _dtrace_globals[] = {
 	&dt_idops_func, "int()" },
 { "rindex", DT_IDENT_FUNC, 0, DIF_SUBR_RINDEX, DT_ATTR_STABCMN, DT_VERS_1_1,
 	&dt_idops_func, "int(const char *, const char *, [int])" },
-#if defined(sun)
+#ifdef illumos
 { "rw_iswriter", DT_IDENT_FUNC, 0, DIF_SUBR_RW_ISWRITER,
 	DT_ATTR_EVOLCMN, DT_VERS_1_0,
 	&dt_idops_func, "int(genunix`krwlock_t *)" },
@@ -471,7 +470,7 @@ static const dt_ident_t _dtrace_globals[] = {
 	&dt_idops_func, "string(const char *, int, [int])" },
 { "sum", DT_IDENT_AGGFUNC, 0, DTRACEAGG_SUM, DT_ATTR_STABCMN, DT_VERS_1_0,
 	&dt_idops_func, "void(@)" },
-#if !defined(sun)
+#ifndef illumos
 { "sx_isexclusive", DT_IDENT_FUNC, 0, DIF_SUBR_SX_ISEXCLUSIVE,
 	DT_ATTR_EVOLCMN, DT_VERS_1_0,
 	&dt_idops_func, sxlock_str },
@@ -531,12 +530,12 @@ static const dt_ident_t _dtrace_globals[] = {
 { "walltimestamp", DT_IDENT_SCALAR, 0, DIF_VAR_WALLTIMESTAMP,
 	DT_ATTR_STABCMN, DT_VERS_1_0,
 	&dt_idops_type, "int64_t" },
-#if defined(sun)
+#ifdef illumos
 { "zonename", DT_IDENT_SCALAR, 0, DIF_VAR_ZONENAME,
 	DT_ATTR_STABCMN, DT_VERS_1_0, &dt_idops_type, "string" },
 #endif
 
-#if !defined(sun)
+#ifndef illumos
 { "cpu", DT_IDENT_SCALAR, 0, DIF_VAR_CPU,
 	DT_ATTR_STABCMN, DT_VERS_1_6_3, &dt_idops_type, "int" },
 #endif
@@ -780,7 +779,7 @@ const dtrace_pattr_t _dtrace_prvdesc = {
 { DTRACE_STABILITY_UNSTABLE, DTRACE_STABILITY_UNSTABLE, DTRACE_CLASS_COMMON },
 };
 
-#if defined(sun)
+#ifdef illumos
 const char *_dtrace_defcpp = "/usr/ccs/lib/cpp"; /* default cpp(1) to invoke */
 const char *_dtrace_defld = "/usr/ccs/bin/ld";   /* default ld(1) to invoke */
 #else
@@ -789,7 +788,7 @@ const char *_dtrace_defld = "ld";   /* default ld(1) to invoke */
 #endif
 
 const char *_dtrace_libdir = "/usr/lib/dtrace"; /* default library directory */
-#if defined(sun)
+#ifdef illumos
 const char *_dtrace_provdir = "/dev/dtrace/provider"; /* provider directory */
 #else
 const char *_dtrace_provdir = "/dev/dtrace"; /* provider directory */
@@ -814,7 +813,7 @@ typedef struct dt_fdlist {
 	uint_t df_size;		/* size of df_fds[] */
 } dt_fdlist_t;
 
-#if defined(sun)
+#ifdef illumos
 #pragma init(_dtrace_init)
 #else
 void _dtrace_init(void) __attribute__ ((constructor));
@@ -850,7 +849,7 @@ dt_provmod_open(dt_provmod_t **provmod, dt_fdlist_t *dfp)
 	dt_provmod_t *prov;
 	char path[PATH_MAX];
 	int fd;
-#if defined(sun)
+#ifdef illumos
 	struct dirent *dp, *ep;
 	DIR *dirp;
 
@@ -897,7 +896,7 @@ dt_provmod_open(dt_provmod_t **provmod, dt_fdlist_t *dfp)
 	}
 
 	(void) closedir(dirp);
-#else
+#else	/* !illumos */
 	char	*p;
 	char	*p1;
 	char	*p_providers = NULL;
@@ -982,7 +981,7 @@ dt_provmod_open(dt_provmod_t **provmod, dt_fdlist_t *dfp)
 	}
 	if (p_providers != NULL)
 		free(p_providers);
-#endif
+#endif	/* illumos */
 }
 
 static void
@@ -999,7 +998,7 @@ dt_provmod_destroy(dt_provmod_t **provmod)
 	*provmod = NULL;
 }
 
-#if defined(sun)
+#ifdef illumos
 static const char *
 dt_get_sysinfo(int cmd, char *buf, size_t len)
 {
@@ -1112,7 +1111,7 @@ dt_vopen(int version, int flags, int *errp,
 		err = errno;
 	}
 #endif
-#if defined(sun)
+#ifdef illumos
 	ftfd = open("/dev/dtrace/provider/fasttrap", O_RDWR);
 #else
 	ftfd = open("/dev/dtrace/fasttrap", O_RDWR);
@@ -1154,7 +1153,7 @@ alloc:
 
 	bzero(dtp, sizeof (dtrace_hdl_t));
 	dtp->dt_oflags = flags;
-#if defined(sun)
+#ifdef illumos
 	dtp->dt_prcmode = DT_PROC_STOP_PREINIT;
 #else
 	dtp->dt_prcmode = DT_PROC_STOP_POSTINIT;
@@ -1170,7 +1169,7 @@ alloc:
 	dtp->dt_fterr = fterr;
 	dtp->dt_cdefs_fd = -1;
 	dtp->dt_ddefs_fd = -1;
-#if defined(sun)
+#ifdef illumos
 	dtp->dt_stdout_fd = -1;
 #else
 	dtp->dt_freopen_fp = NULL;
@@ -1202,7 +1201,7 @@ alloc:
 
 	dtp->dt_cpp_argv[0] = (char *)strbasename(dtp->dt_cpp_path);
 
-#if defined(sun)
+#ifdef illumos
 	(void) snprintf(isadef, sizeof (isadef), "-D__SUNW_D_%u",
 	    (uint_t)(sizeof (void *) * NBBY));
 
@@ -1242,7 +1241,7 @@ alloc:
 		return (set_open_errno(dtp, errp, EDT_NOMEM));
 #endif
 
-#if defined(sun)
+#ifdef illumos
 #ifdef __x86
 	/*
 	 * On x86 systems, __i386 is defined for <sys/isa_defs.h> for 32-bit
@@ -1282,7 +1281,7 @@ alloc:
 	 * 'kern.bootfile' sysctl value tells us exactly which file is being
 	 * used as the kernel.
 	 */
-#if !defined(sun)
+#ifndef illumos
 	{
 	char bootfile[MAXPATHLEN];
 	char *p;
@@ -1644,7 +1643,7 @@ dtrace_close(dtrace_hdl_t *dtp)
 		(void) close(dtp->dt_cdefs_fd);
 	if (dtp->dt_ddefs_fd != -1)
 		(void) close(dtp->dt_ddefs_fd);
-#if defined(sun)
+#ifdef illumos
 	if (dtp->dt_stdout_fd != -1)
 		(void) close(dtp->dt_stdout_fd);
 #else
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_options.c b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_options.c
index 832af888446a..e9164d09a857 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_options.c
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_options.c
@@ -38,7 +38,7 @@
 #include <stdlib.h>
 #include <unistd.h>
 #include <limits.h>
-#if defined(sun)
+#ifdef illumos
 #include <alloca.h>
 #endif
 #include <errno.h>
@@ -871,7 +871,7 @@ dt_options_load(dtrace_hdl_t *dtp)
 	bzero(&hdr, sizeof (dof_hdr_t));
 	hdr.dofh_loadsz = sizeof (dof_hdr_t);
 
-#if defined(sun)
+#ifdef illumos
 	if (dt_ioctl(dtp, DTRACEIOC_DOFGET, &hdr) == -1)
 #else
 	dof = &hdr;
@@ -889,7 +889,7 @@ dt_options_load(dtrace_hdl_t *dtp)
 	for (i = 0; i < DTRACEOPT_MAX; i++)
 		dtp->dt_options[i] = DTRACEOPT_UNSET;
 
-#if defined(sun)
+#ifdef illumos
 	if (dt_ioctl(dtp, DTRACEIOC_DOFGET, dof) == -1)
 #else
 	if (dt_ioctl(dtp, DTRACEIOC_DOFGET, &dof) == -1)
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_parser.c b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_parser.c
index 6ce3dadd4e84..ee31cef5f28c 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_parser.c
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_parser.c
@@ -102,7 +102,7 @@
 #include <setjmp.h>
 #include <strings.h>
 #include <assert.h>
-#if defined(sun)
+#ifdef illumos
 #include <alloca.h>
 #endif
 #include <stdlib.h>
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_pid.c b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_pid.c
index 6c529e5e6033..e628e62e9cc4 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_pid.c
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_pid.c
@@ -33,7 +33,7 @@
 #include <stdio.h>
 #include <errno.h>
 #include <ctype.h>
-#if defined(sun)
+#ifdef illumos
 #include <alloca.h>
 #endif
 #include <libgen.h>
@@ -44,7 +44,7 @@
 #include <dt_program.h>
 #include <dt_pid.h>
 #include <dt_string.h>
-#if !defined(sun)
+#ifndef illumos
 #include <libproc_compat.h>
 #endif
 #include <dt_module.h>
@@ -74,7 +74,7 @@ typedef struct dt_pid_probe {
 static void
 dt_pid_objname(char *buf, size_t len, Lmid_t lmid, const char *obj)
 {
-#if defined(sun)
+#ifdef illumos
 	if (lmid == LM_ID_BASE)
 		(void) strncpy(buf, obj, len);
 	else
@@ -126,7 +126,7 @@ dt_pid_per_sym(dt_pid_probe_t *pp, const GElf_Sym *symp, const char *func)
 	int isdash = strcmp("-", func) == 0;
 	pid_t pid;
 
-#if defined(sun)
+#ifdef illumos
 	pid = Pstatus(pp->dpp_pr)->pr_pid;
 #else
 	pid = proc_getpid(pp->dpp_pr);
@@ -270,7 +270,7 @@ dt_pid_per_mod(void *arg, const prmap_t *pmp, const char *obj)
 	if (obj == NULL)
 		return (0);
 
-#if defined(sun)
+#ifdef illumos
 	(void) Plmid(pp->dpp_pr, pmp->pr_vaddr, &pp->dpp_lmid);
 #endif
 	
@@ -279,7 +279,7 @@ dt_pid_per_mod(void *arg, const prmap_t *pmp, const char *obj)
 		pp->dpp_obj = obj;
 	else
 		pp->dpp_obj++;
-#if defined(sun)
+#ifdef illumos
 	if (Pxlookup_by_name(pp->dpp_pr, pp->dpp_lmid, obj, ".stret1", &sym,
 	    NULL) == 0)
 		pp->dpp_stret[0] = sym.st_value;
@@ -337,7 +337,7 @@ dt_pid_per_mod(void *arg, const prmap_t *pmp, const char *obj)
 				    GELF_ST_INFO(STB_LOCAL, STT_FUNC);
 				sym.st_other = 0;
 				sym.st_value = 0;
-#if defined(sun)
+#ifdef illumos
 				sym.st_size = Pstatus(pp->dpp_pr)->pr_dmodel ==
 				    PR_MODEL_ILP32 ? -1U : -1ULL;
 #else
@@ -404,7 +404,7 @@ dt_pid_mod_filt(void *arg, const prmap_t *pmp, const char *obj)
 	if (gmatch(obj, pp->dpp_mod))
 		return (dt_pid_per_mod(pp, pmp, obj));
 
-#if defined(sun)
+#ifdef illumos
 	(void) Plmid(pp->dpp_pr, pmp->pr_vaddr, &pp->dpp_lmid);
 #else
 	pp->dpp_lmid = 0;
@@ -418,7 +418,7 @@ dt_pid_mod_filt(void *arg, const prmap_t *pmp, const char *obj)
 	if (gmatch(pp->dpp_obj, pp->dpp_mod))
 		return (dt_pid_per_mod(pp, pmp, obj));
 
-#if defined(sun)
+#ifdef illumos
 	(void) Plmid(pp->dpp_pr, pmp->pr_vaddr, &pp->dpp_lmid);
 #endif
 
@@ -468,7 +468,7 @@ dt_pid_fix_mod(dtrace_probedesc_t *pdp, struct ps_prochandle *P)
 	else
 		obj++;
 
-#if defined(sun)
+#ifdef illumos
 	(void) Plmid(P, pmp->pr_vaddr, &lmid);
 #endif
 
@@ -599,13 +599,13 @@ dt_pid_usdt_mapping(void *data, const prmap_t *pmp, const char *oname)
 		dh.dofhp_addr = (e_type == ET_EXEC) ? 0 : pmp->pr_vaddr;
 
 		dt_pid_objname(dh.dofhp_mod, sizeof (dh.dofhp_mod),
-#if defined(sun)
+#ifdef illumos
 		    sip.prs_lmid, mname);
 #else
 		    0, mname);
 #endif
 
-#if defined(sun)
+#ifdef illumos
 		if (fd == -1 &&
 		    (fd = pr_open(P, "/dev/dtrace/helper", O_RDWR, 0)) < 0) {
 			dt_dprintf("pr_open of helper device failed: %s\n",
@@ -618,7 +618,7 @@ dt_pid_usdt_mapping(void *data, const prmap_t *pmp, const char *oname)
 #endif
 	}
 
-#if defined(sun)
+#ifdef illumos
 	if (fd != -1)
 		(void) pr_close(P, fd);
 #endif
@@ -634,13 +634,13 @@ dt_pid_create_usdt_probes(dtrace_probedesc_t *pdp, dtrace_hdl_t *dtp,
 	int ret = 0;
 
 	assert(DT_MUTEX_HELD(&dpr->dpr_lock));
-#if defined(sun)
+#ifdef illumos
 	(void) Pupdate_maps(P);
 	if (Pobject_iter(P, dt_pid_usdt_mapping, P) != 0) {
 		ret = -1;
 		(void) dt_pid_error(dtp, pcb, dpr, NULL, D_PROC_USDT,
 		    "failed to instantiate probes for pid %d: %s",
-#if defined(sun)
+#ifdef illumos
 		    (int)Pstatus(P)->pr_pid, strerror(errno));
 #else
 		    (int)proc_getpid(P), strerror(errno));
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_pragma.c b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_pragma.c
index 7f49f640a944..bd0d708bde5a 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_pragma.c
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_pragma.c
@@ -28,7 +28,7 @@
 
 #include <assert.h>
 #include <strings.h>
-#if defined(sun)
+#ifdef illumos
 #include <alloca.h>
 #endif
 #include <fcntl.h>
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_printf.c b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_printf.c
index eeb8735f6f05..ae26d55ba8be 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_printf.c
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_printf.c
@@ -25,7 +25,7 @@
  * Copyright (c) 2013 by Delphix. All rights reserved.
  */
 
-#if defined(sun)
+#ifdef illumos
 #include <sys/sysmacros.h>
 #else
 #define	ABS(a)		((a) < 0 ? -(a) : (a))
@@ -33,7 +33,7 @@
 #include <string.h>
 #include <strings.h>
 #include <stdlib.h>
-#if defined(sun)
+#ifdef illumos
 #include <alloca.h>
 #endif
 #include <assert.h>
@@ -467,7 +467,7 @@ pfprint_time(dtrace_hdl_t *dtp, FILE *fp, const char *format,
 	 * Below, we turn this into the canonical adb/mdb /[yY] format,
 	 * "1973 Dec  3 17:20:00".
 	 */
-#if defined(sun)
+#ifdef illumos
 	(void) ctime_r(&sec, src, sizeof (src));
 #else
 	(void) ctime_r(&sec, src);
@@ -518,7 +518,7 @@ pfprint_port(dtrace_hdl_t *dtp, FILE *fp, const char *format,
 	char buf[256];
 	struct servent *sv, res;
 
-#if defined(sun)
+#ifdef illumos
 	if ((sv = getservbyport_r(port, NULL, &res, buf, sizeof (buf))) != NULL)
 #else
 	if (getservbyport_r(port, NULL, &res, buf, sizeof (buf), &sv) > 0)
@@ -544,7 +544,7 @@ pfprint_inetaddr(dtrace_hdl_t *dtp, FILE *fp, const char *format,
 	s[size] = '\0';
 
 	if (strchr(s, ':') == NULL && inet_pton(AF_INET, s, inetaddr) != -1) {
-#if defined(sun)
+#ifdef illumos
 		if ((host = gethostbyaddr_r(inetaddr, NS_INADDRSZ,
 		    AF_INET, &res, buf, sizeof (buf), &e)) != NULL)
 #else
@@ -694,7 +694,7 @@ static const dt_pfconv_t _dtrace_conversions[] = {
 { "S", "s", pfproto_cstr, pfcheck_str, pfprint_estr },
 { "T", "s", "int64_t", pfcheck_time, pfprint_time822 },
 { "u", "u", pfproto_xint, pfcheck_xint, pfprint_uint },
-#if defined(sun)
+#ifdef illumos
 { "wc",	"wc", "int", pfcheck_type, pfprint_sint }, /* a.k.a. wchar_t */
 { "ws", "ws", pfproto_wstr, pfcheck_wstr, pfprint_wstr },
 #else
@@ -1657,7 +1657,7 @@ dtrace_freopen(dtrace_hdl_t *dtp, FILE *fp, void *fmtdata,
 	if (rval == -1 || fp == NULL)
 		return (rval);
 
-#if defined(sun)
+#ifdef illumos
 	if (pfd->pfd_preflen != 0 &&
 	    strcmp(pfd->pfd_prefix, DT_FREOPEN_RESTORE) == 0) {
 		/*
@@ -1739,7 +1739,7 @@ dtrace_freopen(dtrace_hdl_t *dtp, FILE *fp, void *fmtdata,
 	}
 
 	(void) fclose(nfp);
-#else
+#else	/* !illumos */
 	/*
 	 * The 'standard output' (which is not necessarily stdout)
 	 * treatment on FreeBSD is implemented differently than on
@@ -1814,7 +1814,7 @@ dtrace_freopen(dtrace_hdl_t *dtp, FILE *fp, void *fmtdata,
 
 	/* Remember that the output has been redirected to the new file. */
 	dtp->dt_freopen_fp = nfp;
-#endif
+#endif	/* illumos */
 
 	return (rval);
 }
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_proc.c b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_proc.c
index d40a0ae1eb18..79c187140de9 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_proc.c
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_proc.c
@@ -77,7 +77,7 @@
  */
 
 #include <sys/wait.h>
-#if defined(sun)
+#ifdef illumos
 #include <sys/lwp.h>
 #endif
 #include <strings.h>
@@ -89,7 +89,7 @@
 #include <dt_pid.h>
 #include <dt_impl.h>
 
-#if !defined(sun)
+#ifndef illumos
 #include <sys/syscall.h>
 #include <libproc_compat.h>
 #define	SYS_forksys SYS_fork
@@ -143,7 +143,7 @@ dt_proc_bpdestroy(dt_proc_t *dpr, int delbkpts)
 static void
 dt_proc_bpmatch(dtrace_hdl_t *dtp, dt_proc_t *dpr)
 {
-#if defined(sun)
+#ifdef illumos
 	const lwpstatus_t *psp = &Pstatus(dpr->dpr_proc)->pr_lwp;
 #else
 	unsigned long pc;
@@ -152,14 +152,14 @@ dt_proc_bpmatch(dtrace_hdl_t *dtp, dt_proc_t *dpr)
 
 	assert(DT_MUTEX_HELD(&dpr->dpr_lock));
 
-#if !defined(sun)
+#ifndef illumos
 	proc_regget(dpr->dpr_proc, REG_PC, &pc);
 	proc_bkptregadj(&pc);
 #endif
 
 	for (dbp = dt_list_next(&dpr->dpr_bps);
 	    dbp != NULL; dbp = dt_list_next(dbp)) {
-#if defined(sun)
+#ifdef illumos
 		if (psp->pr_reg[R_PC] == dbp->dbp_addr)
 			break;
 #else
@@ -170,7 +170,7 @@ dt_proc_bpmatch(dtrace_hdl_t *dtp, dt_proc_t *dpr)
 
 	if (dbp == NULL) {
 		dt_dprintf("pid %d: spurious breakpoint wakeup for %lx\n",
-#if defined(sun)
+#ifdef illumos
 		    (int)dpr->dpr_pid, (ulong_t)psp->pr_reg[R_PC]);
 #else
 		    (int)dpr->dpr_pid, pc);
@@ -342,7 +342,7 @@ dt_proc_rdwatch(dt_proc_t *dpr, rd_event_e event, const char *evname)
 	}
 
 	(void) dt_proc_bpcreate(dpr, rdn.u.bptaddr,
-#if defined(sun)
+#ifdef illumos
 	    (dt_bkpt_f *)dt_proc_rdevent, (void *)evname);
 #else
 	    /* XXX ugly */
@@ -357,7 +357,7 @@ dt_proc_rdwatch(dt_proc_t *dpr, rd_event_e event, const char *evname)
 static void
 dt_proc_attach(dt_proc_t *dpr, int exec)
 {
-#if defined(sun)
+#ifdef illumos
 	const pstatus_t *psp = Pstatus(dpr->dpr_proc);
 #endif
 	rd_err_e err;
@@ -366,23 +366,23 @@ dt_proc_attach(dt_proc_t *dpr, int exec)
 	assert(DT_MUTEX_HELD(&dpr->dpr_lock));
 
 	if (exec) {
-#if defined(sun)
+#ifdef illumos
 		if (psp->pr_lwp.pr_errno != 0)
 			return; /* exec failed: nothing needs to be done */
 #endif
 
 		dt_proc_bpdestroy(dpr, B_FALSE);
-#if defined(sun)
+#ifdef illumos
 		Preset_maps(dpr->dpr_proc);
 #endif
 	}
 	if ((dpr->dpr_rtld = Prd_agent(dpr->dpr_proc)) != NULL &&
 	    (err = rd_event_enable(dpr->dpr_rtld, B_TRUE)) == RD_OK) {
-#if defined(sun)
+#ifdef illumos
 		dt_proc_rdwatch(dpr, RD_PREINIT, "RD_PREINIT");
 #endif
 		dt_proc_rdwatch(dpr, RD_POSTINIT, "RD_POSTINIT");
-#if defined(sun)
+#ifdef illumos
 		dt_proc_rdwatch(dpr, RD_DLACTIVITY, "RD_DLACTIVITY");
 #endif
 	} else {
@@ -507,7 +507,7 @@ dt_proc_control(void *arg)
 	struct ps_prochandle *P = dpr->dpr_proc;
 	int pid = dpr->dpr_pid;
 
-#if defined(sun)
+#ifdef illumos
 	int pfd = Pctlfd(P);
 
 	const long wstop = PCWSTOP;
@@ -529,7 +529,7 @@ dt_proc_control(void *arg)
 	 */
 	(void) pthread_mutex_lock(&dpr->dpr_lock);
 
-#if defined(sun)
+#ifdef illumos
 	(void) Punsetflags(P, PR_ASYNC);	/* require synchronous mode */
 	(void) Psetflags(P, PR_BPTADJ);		/* always adjust eip on x86 */
 	(void) Punsetflags(P, PR_FORK);		/* do not inherit on fork */
@@ -562,7 +562,7 @@ dt_proc_control(void *arg)
 	 * If PR_KLC is set, we created the process; otherwise we grabbed it.
 	 * Check for an appropriate stop request and wait for dt_proc_continue.
 	 */
-#if defined(sun)
+#ifdef illumos
 	if (Pstatus(P)->pr_flags & PR_KLC)
 #else
 	if (proc_getflags(P) & PR_KLC)
@@ -590,7 +590,7 @@ dt_proc_control(void *arg)
 	while (!dpr->dpr_quit) {
 		const lwpstatus_t *psp;
 
-#if defined(sun)
+#ifdef illumos
 		if (write(pfd, &wstop, sizeof (wstop)) == -1 && errno == EINTR)
 			continue; /* check dpr_quit and continue waiting */
 #else
@@ -602,7 +602,7 @@ dt_proc_control(void *arg)
 
 		(void) pthread_mutex_lock(&dpr->dpr_lock);
 
-#if defined(sun)
+#ifdef illumos
 pwait_locked:
 		if (Pstopstatus(P, PCNULL, 0) == -1 && errno == EINTR) {
 			(void) pthread_mutex_unlock(&dpr->dpr_lock);
@@ -612,7 +612,7 @@ pwait_locked:
 
 		switch (Pstate(P)) {
 		case PS_STOP:
-#if defined(sun)
+#ifdef illumos
 			psp = &Pstatus(P)->pr_lwp;
 #else
 			psp = proc_getlwpstatus(P);
@@ -661,7 +661,7 @@ pwait_locked:
 			break;
 
 		case PS_LOST:
-#if defined(sun)
+#ifdef illumos
 			if (Preopen(P) == 0)
 				goto pwait_locked;
 #endif
@@ -734,7 +734,7 @@ dt_proc_t *
 dt_proc_lookup(dtrace_hdl_t *dtp, struct ps_prochandle *P, int remove)
 {
 	dt_proc_hash_t *dph = dtp->dt_procs;
-#if defined(sun)
+#ifdef illumos
 	pid_t pid = Pstatus(P)->pr_pid;
 #else
 	pid_t pid = proc_getpid(P);
@@ -772,14 +772,14 @@ dt_proc_destroy(dtrace_hdl_t *dtp, struct ps_prochandle *P)
 	 * an external debugger and we were waiting in dt_proc_waitrun().
 	 * Leave the process in this condition using PRELEASE_HANG.
 	 */
-#if defined(sun)
+#ifdef illumos
 	if (!(Pstatus(dpr->dpr_proc)->pr_flags & (PR_KLC | PR_RLC))) {
 #else
 	if (!(proc_getflags(dpr->dpr_proc) & (PR_KLC | PR_RLC))) {
 #endif
 		dt_dprintf("abandoning pid %d\n", (int)dpr->dpr_pid);
 		rflag = PRELEASE_HANG;
-#if defined(sun)
+#ifdef illumos
 	} else if (Pstatus(dpr->dpr_proc)->pr_flags & PR_KLC) {
 #else
 	} else if (proc_getflags(dpr->dpr_proc) & PR_KLC) {
@@ -808,7 +808,7 @@ dt_proc_destroy(dtrace_hdl_t *dtp, struct ps_prochandle *P)
 		 */
 		(void) pthread_mutex_lock(&dpr->dpr_lock);
 		dpr->dpr_quit = B_TRUE;
-#if defined(sun)
+#ifdef illumos
 		(void) _lwp_kill(dpr->dpr_tid, SIGCANCEL);
 #else
 		pthread_kill(dpr->dpr_tid, SIGTHR);
@@ -880,7 +880,7 @@ dt_proc_create_thread(dtrace_hdl_t *dtp, dt_proc_t *dpr, uint_t stop)
 
 	(void) sigfillset(&nset);
 	(void) sigdelset(&nset, SIGABRT);	/* unblocked for assert() */
-#if defined(sun)
+#ifdef illumos
 	(void) sigdelset(&nset, SIGCANCEL);	/* see dt_proc_destroy() */
 #else
 	(void) sigdelset(&nset, SIGUSR1);	/* see dt_proc_destroy() */
@@ -912,7 +912,7 @@ dt_proc_create_thread(dtrace_hdl_t *dtp, dt_proc_t *dpr, uint_t stop)
 		 * small amount of useful information to help figure it out.
 		 */
 		if (dpr->dpr_done) {
-#if defined(sun)
+#ifdef illumos
 			const psinfo_t *prp = Ppsinfo(dpr->dpr_proc);
 			int stat = prp ? prp->pr_wstat : 0;
 			int pid = dpr->dpr_pid;
@@ -963,7 +963,7 @@ dt_proc_create(dtrace_hdl_t *dtp, const char *file, char *const *argv,
 	(void) pthread_mutex_init(&dpr->dpr_lock, NULL);
 	(void) pthread_cond_init(&dpr->dpr_cv, NULL);
 
-#if defined(sun)
+#ifdef illumos
 	if ((dpr->dpr_proc = Pcreate(file, argv, &err, NULL, 0)) == NULL) {
 #else
 	if ((err = proc_create(file, argv, pcf, child_arg,
@@ -974,7 +974,7 @@ dt_proc_create(dtrace_hdl_t *dtp, const char *file, char *const *argv,
 	}
 
 	dpr->dpr_hdl = dtp;
-#if defined(sun)
+#ifdef illumos
 	dpr->dpr_pid = Pstatus(dpr->dpr_proc)->pr_pid;
 #else
 	dpr->dpr_pid = proc_getpid(dpr->dpr_proc);
@@ -1039,7 +1039,7 @@ dt_proc_grab(dtrace_hdl_t *dtp, pid_t pid, int flags, int nomonitor)
 	(void) pthread_mutex_init(&dpr->dpr_lock, NULL);
 	(void) pthread_cond_init(&dpr->dpr_cv, NULL);
 
-#if defined(sun)
+#ifdef illumos
 	if ((dpr->dpr_proc = Pgrab(pid, flags, &err)) == NULL) {
 #else
 	if ((err = proc_attach(pid, flags, &dpr->dpr_proc)) != 0) {
@@ -1174,7 +1174,7 @@ dtrace_proc_create(dtrace_hdl_t *dtp, const char *file, char *const *argv,
 	struct ps_prochandle *P = dt_proc_create(dtp, file, argv, pcf, child_arg);
 
 	if (P != NULL && idp != NULL && idp->di_id == 0) {
-#if defined(sun)
+#ifdef illumos
 		idp->di_id = Pstatus(P)->pr_pid; /* $target = created pid */
 #else
 		idp->di_id = proc_getpid(P); /* $target = created pid */
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_program.c b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_program.c
index a325c42cbf23..232a3723b11d 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_program.c
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_program.c
@@ -30,7 +30,7 @@
 #include <errno.h>
 #include <assert.h>
 #include <ctype.h>
-#if defined(sun)
+#ifdef illumos
 #include <alloca.h>
 #endif
 
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_provider.c b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_provider.c
index cd8ceb655934..29138746cfd9 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_provider.c
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_provider.c
@@ -28,7 +28,7 @@
  */
 
 #include <sys/types.h>
-#if defined(sun)
+#ifdef illumos
 #include <sys/sysmacros.h>
 #endif
 
@@ -36,7 +36,7 @@
 #include <limits.h>
 #include <strings.h>
 #include <stdlib.h>
-#if defined(sun)
+#ifdef illumos
 #include <alloca.h>
 #endif
 #include <unistd.h>
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_subr.c b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_subr.c
index 4429019d5bf7..72fd08aee2c1 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_subr.c
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_subr.c
@@ -25,7 +25,7 @@
  * Use is subject to license terms.
  */
 
-#if defined(sun)
+#ifdef illumos
 #include <sys/sysmacros.h>
 #endif
 #include <sys/isa_defs.h>
@@ -38,7 +38,7 @@
 #include <stdio.h>
 #include <errno.h>
 #include <ctype.h>
-#if defined(sun)
+#ifdef illumos
 #include <alloca.h>
 #else
 #include <sys/sysctl.h>
@@ -477,7 +477,7 @@ dt_dprintf(const char *format, ...)
 }
 
 int
-#if defined(sun)
+#ifdef illumos
 dt_ioctl(dtrace_hdl_t *dtp, int val, void *arg)
 #else
 dt_ioctl(dtrace_hdl_t *dtp, u_long val, void *arg)
@@ -485,7 +485,7 @@ dt_ioctl(dtrace_hdl_t *dtp, u_long val, void *arg)
 {
 	const dtrace_vector_t *v = dtp->dt_vector;
 
-#if !defined(sun)
+#ifndef illumos
 	/* Avoid sign extension. */
 	val &= 0xffffffff;
 #endif
@@ -506,7 +506,7 @@ dt_status(dtrace_hdl_t *dtp, processorid_t cpu)
 	const dtrace_vector_t *v = dtp->dt_vector;
 
 	if (v == NULL) {
-#if defined(sun)
+#ifdef illumos
 		return (p_online(cpu, P_STATUS));
 #else
 		int maxid = 0;
@@ -583,7 +583,7 @@ dt_printf(dtrace_hdl_t *dtp, FILE *fp, const char *format, ...)
 	va_list ap;
 	int n;
 
-#if !defined(sun)
+#ifndef illumos
 	/*
 	 * On FreeBSD, check if output is currently being re-directed
 	 * to another file. If so, output to that file instead of the
@@ -845,7 +845,7 @@ dt_popcb(const ulong_t *bp, ulong_t n)
 	return (popc + dt_popc(bp[maxw] & ((1UL << maxb) - 1)));
 }
 
-#if defined(sun)
+#ifdef illumos
 struct _rwlock;
 struct _lwp_mutex;
 
@@ -867,7 +867,7 @@ dt_rw_write_held(pthread_rwlock_t *lock)
 int
 dt_mutex_held(pthread_mutex_t *lock)
 {
-#if defined(sun)
+#ifdef illumos
 	extern int _mutex_held(struct _lwp_mutex *);
 	return (_mutex_held((struct _lwp_mutex *)lock));
 #else
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_work.c b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_work.c
index d19fb88245e2..07565e0f7850 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_work.c
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_work.c
@@ -82,7 +82,7 @@ dtrace_sleep(dtrace_hdl_t *dtp)
 		return; /* sleep duration has already past */
 	}
 
-#if defined(sun)
+#ifdef illumos
 	tv.tv_sec = (earliest - now) / NANOSEC;
 	tv.tv_nsec = (earliest - now) % NANOSEC;
 
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dtrace.h b/cddl/contrib/opensolaris/lib/libdtrace/common/dtrace.h
index 6f88e6d46c42..f0088a939cb0 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dtrace.h
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dtrace.h
@@ -37,7 +37,7 @@
 #include <stdio.h>
 #include <gelf.h>
 #include <libproc.h>
-#if !defined(sun)
+#ifndef illumos
 #include <rtld_db.h>
 #endif
 
@@ -554,7 +554,7 @@ extern int dtrace_probe_info(dtrace_hdl_t *,
  * entry point to obtain a library handle.
  */
 struct dtrace_vector {
-#if defined(sun)
+#ifdef illumos
 	int (*dtv_ioctl)(void *, int, void *);
 #else
 	int (*dtv_ioctl)(void *, u_long, void *);
@@ -605,7 +605,7 @@ extern int _dtrace_debug;
 }
 #endif
 
-#if !defined(sun)
+#ifndef illumos
 #define _SC_CPUID_MAX		_SC_NPROCESSORS_CONF
 #define _SC_NPROCESSORS_MAX	_SC_NPROCESSORS_CONF
 #endif
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/i386/dt_isadep.c b/cddl/contrib/opensolaris/lib/libdtrace/i386/dt_isadep.c
index 9479e83dd777..34d558767b9e 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/i386/dt_isadep.c
+++ b/cddl/contrib/opensolaris/lib/libdtrace/i386/dt_isadep.c
@@ -39,7 +39,7 @@
 
 #include <dis_tables.h>
 
-#if !defined(sun)
+#ifndef illumos
 #define PR_MODEL_ILP32	1
 #define PR_MODEL_LP64	2
 #include <libproc_compat.h>
@@ -88,7 +88,7 @@ dt_pid_has_jump_table(struct ps_prochandle *P, dtrace_hdl_t *dtp,
 {
 	ulong_t i;
 	int size;
-#if defined(sun)
+#ifdef illumos
 	pid_t pid = Pstatus(P)->pr_pid;
 	char dmodel = Pstatus(P)->pr_dmodel;
 #else
@@ -144,7 +144,7 @@ dt_pid_create_return_probe(struct ps_prochandle *P, dtrace_hdl_t *dtp,
 	uint8_t *text;
 	ulong_t i, end;
 	int size;
-#if defined(sun)
+#ifdef illumos
 	pid_t pid = Pstatus(P)->pr_pid;
 	char dmodel = Pstatus(P)->pr_dmodel;
 #else
@@ -305,7 +305,7 @@ dt_pid_create_offset_probe(struct ps_prochandle *P, dtrace_hdl_t *dtp,
 		uint8_t *text;
 		ulong_t i;
 		int size;
-#if defined(sun)
+#ifdef illumos
 		pid_t pid = Pstatus(P)->pr_pid;
 		char dmodel = Pstatus(P)->pr_dmodel;
 #else
@@ -388,7 +388,7 @@ dt_pid_create_glob_offset_probes(struct ps_prochandle *P, dtrace_hdl_t *dtp,
 	uint8_t *text;
 	int size;
 	ulong_t i, end = symp->st_size;
-#if defined(sun)
+#ifdef illumos
 	pid_t pid = Pstatus(P)->pr_pid;
 	char dmodel = Pstatus(P)->pr_dmodel;
 #else
diff --git a/cddl/contrib/opensolaris/lib/libgen/common/gmatch.c b/cddl/contrib/opensolaris/lib/libgen/common/gmatch.c
index 199fbb356036..ae65019d3e9f 100644
--- a/cddl/contrib/opensolaris/lib/libgen/common/gmatch.c
+++ b/cddl/contrib/opensolaris/lib/libgen/common/gmatch.c
@@ -29,7 +29,7 @@
 
 #pragma ident	"%Z%%M%	%I%	%E% SMI"
 
-#if defined(sun)
+#ifdef illumos
 #pragma weak gmatch = _gmatch
 
 #include "gen_synonyms.h"
@@ -38,7 +38,7 @@
 #include <libgen.h>
 #include <stdlib.h>
 #include <limits.h>
-#if defined(sun)
+#ifdef illumos
 #include <widec.h>
 #include "_range.h"
 #else
diff --git a/cddl/contrib/opensolaris/lib/libzfs/common/libzfs.h b/cddl/contrib/opensolaris/lib/libzfs/common/libzfs.h
index 8a707d1f795c..fbfaab1d6cc5 100644
--- a/cddl/contrib/opensolaris/lib/libzfs/common/libzfs.h
+++ b/cddl/contrib/opensolaris/lib/libzfs/common/libzfs.h
@@ -789,10 +789,10 @@ extern boolean_t libzfs_fru_compare(libzfs_handle_t *, const char *,
 extern boolean_t libzfs_fru_notself(libzfs_handle_t *, const char *);
 extern int zpool_fru_set(zpool_handle_t *, uint64_t, const char *);
 
-#ifndef sun
+#ifndef illumos
 extern int zmount(const char *, const char *, int, char *, char *, int, char *,
     int);
-#endif	/* !sun */
+#endif
 
 #ifdef	__cplusplus
 }
diff --git a/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_dataset.c b/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_dataset.c
index 8df7471cb87f..6d9b68ffde49 100644
--- a/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_dataset.c
+++ b/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_dataset.c
@@ -1112,7 +1112,7 @@ zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl,
 		}
 		case ZFS_PROP_MLSLABEL:
 		{
-#ifdef sun
+#ifdef illumos
 			/*
 			 * Verify the mlslabel string and convert to
 			 * internal hex label string.
@@ -1161,11 +1161,11 @@ badlabel:
 			    "invalid mlslabel '%s'"), strval);
 			(void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 			m_label_free(new_sl);	/* OK if null */
-#else	/* !sun */
+#else	/* !illumos */
 			zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 			    "mlslabel is not supported on FreeBSD"));
 			(void) zfs_error(hdl, EZFS_BADPROP, errbuf);
-#endif	/* !sun */
+#endif	/* illumos */
 			goto error;
 
 		}
@@ -2423,7 +2423,7 @@ zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen,
 
 	case ZFS_PROP_MLSLABEL:
 		{
-#ifdef sun
+#ifdef illumos
 			m_label_t *new_sl = NULL;
 			char *ascii = NULL;	/* human readable label */
 
@@ -2457,9 +2457,9 @@ zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen,
 
 			(void) strlcpy(propbuf, ascii, proplen);
 			free(ascii);
-#else	/* !sun */
+#else	/* !illumos */
 			propbuf[0] = '\0';
-#endif	/* !sun */
+#endif	/* illumos */
 		}
 		break;
 
@@ -2569,7 +2569,7 @@ static int
 idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser,
     char **domainp, idmap_rid_t *ridp)
 {
-#ifdef sun
+#ifdef illumos
 	idmap_get_handle_t *get_hdl = NULL;
 	idmap_stat status;
 	int err = EINVAL;
@@ -2594,10 +2594,10 @@ out:
 	if (get_hdl)
 		idmap_get_destroy(get_hdl);
 	return (err);
-#else	/* !sun */
+#else	/* !illumos */
 	assert(!"invalid code path");
 	return (EINVAL); // silence compiler warning
-#endif	/* !sun */
+#endif	/* illumos */
 }
 
 /*
@@ -2632,7 +2632,7 @@ userquota_propname_decode(const char *propname, boolean_t zoned,
 	cp = strchr(propname, '@') + 1;
 
 	if (strchr(cp, '@')) {
-#ifdef sun
+#ifdef illumos
 		/*
 		 * It's a SID name (eg "user@domain") that needs to be
 		 * turned into S-1-domainID-RID.
@@ -2678,9 +2678,9 @@ userquota_propname_decode(const char *propname, boolean_t zoned,
 		cp = numericsid;
 		*ridp = rid;
 		/* will be further decoded below */
-#else	/* !sun */
+#else	/* !illumos */
 		return (ENOENT);
-#endif	/* !sun */
+#endif	/* illumos */
 	}
 
 	if (strncmp(cp, "S-1-", 4) == 0) {
@@ -4184,7 +4184,7 @@ zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props)
 	}
 }
 
-#ifdef sun
+#ifdef illumos
 static int
 zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path,
     zfs_smb_acl_op_t cmd, char *resource1, char *resource2)
@@ -4266,7 +4266,7 @@ zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path,
 	return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME,
 	    oldname, newname));
 }
-#endif	/* sun */
+#endif	/* illumos */
 
 int
 zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type,
diff --git a/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_diff.c b/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_diff.c
index ab2007d98a33..dde329a8226f 100644
--- a/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_diff.c
+++ b/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_diff.c
@@ -494,7 +494,7 @@ find_shares_object(differ_info_t *di)
 	(void) strlcat(fullpath, ZDIFF_SHARESDIR, MAXPATHLEN);
 
 	if (stat64(fullpath, &sb) != 0) {
-#ifdef sun
+#ifdef illumos
 		(void) snprintf(di->errbuf, sizeof (di->errbuf),
 		    dgettext(TEXT_DOMAIN, "Cannot stat %s"), fullpath);
 		return (zfs_error(di->zhp->zfs_hdl, EZFS_DIFF, di->errbuf));
diff --git a/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_import.c b/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_import.c
index 49a43855d5fe..67eba1b88eb7 100644
--- a/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_import.c
+++ b/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_import.c
@@ -952,7 +952,7 @@ slice_cache_compare(const void *arg1, const void *arg2)
 	return (rv > 0 ? 1 : -1);
 }
 
-#ifdef sun
+#ifdef illumos
 static void
 check_one_slice(avl_tree_t *r, char *diskname, uint_t partno,
     diskaddr_t size, uint_t blksz)
@@ -975,12 +975,12 @@ check_one_slice(avl_tree_t *r, char *diskname, uint_t partno,
 	    (node = avl_find(r, &tmpnode, NULL)))
 		node->rn_nozpool = B_TRUE;
 }
-#endif	/* sun */
+#endif	/* illumos */
 
 static void
 nozpool_all_slices(avl_tree_t *r, const char *sname)
 {
-#ifdef sun
+#ifdef illumos
 	char diskname[MAXNAMELEN];
 	char *ptr;
 	int i;
@@ -996,10 +996,10 @@ nozpool_all_slices(avl_tree_t *r, const char *sname)
 	ptr[0] = 'p';
 	for (i = 0; i <= FD_NUMPART; i++)
 		check_one_slice(r, diskname, i, 0, 1);
-#endif	/* sun */
+#endif	/* illumos */
 }
 
-#ifdef sun
+#ifdef illumos
 static void
 check_slices(avl_tree_t *r, int fd, const char *sname)
 {
@@ -1033,7 +1033,7 @@ check_slices(avl_tree_t *r, int fd, const char *sname)
 		efi_free(gpt);
 	}
 }
-#endif	/* sun */
+#endif	/* illumos */
 
 static void
 zpool_open_func(void *arg)
@@ -1063,7 +1063,7 @@ zpool_open_func(void *arg)
 		return;
 	}
 	/* this file is too small to hold a zpool */
-#ifdef sun
+#ifdef illumos
 	if (S_ISREG(statbuf.st_mode) &&
 	    statbuf.st_size < SPA_MINDEVSIZE) {
 		(void) close(fd);
@@ -1075,12 +1075,12 @@ zpool_open_func(void *arg)
 		 */
 		check_slices(rn->rn_avl, fd, rn->rn_name);
 	}
-#else	/* !sun */
+#else	/* !illumos */
 	if (statbuf.st_size < SPA_MINDEVSIZE) {
 		(void) close(fd);
 		return;
 	}
-#endif	/* sun */
+#endif	/* illumos */
 
 	if ((zpool_read_label(fd, &config)) != 0) {
 		(void) close(fd);
diff --git a/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_mount.c b/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_mount.c
index f8596ede3ba6..6c115153bf07 100644
--- a/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_mount.c
+++ b/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_mount.c
@@ -139,7 +139,7 @@ is_shared(libzfs_handle_t *hdl, const char *mountpoint, zfs_share_proto_t proto)
 
 		*tab = '\0';
 		if (strcmp(buf, mountpoint) == 0) {
-#ifdef sun
+#ifdef illumos
 			/*
 			 * the protocol field is the third field
 			 * skip over second field
@@ -172,7 +172,7 @@ is_shared(libzfs_handle_t *hdl, const char *mountpoint, zfs_share_proto_t proto)
 	return (SHARED_NOT_SHARED);
 }
 
-#ifdef sun
+#ifdef illumos
 /*
  * Returns true if the specified directory is empty.  If we can't open the
  * directory at all, return true so that the mount can fail with a more
@@ -297,7 +297,7 @@ zfs_mount(zfs_handle_t *zhp, const char *options, int flags)
 		}
 	}
 
-#ifdef sun	/* FreeBSD: overlay mounts are not checked. */
+#ifdef illumos	/* FreeBSD: overlay mounts are not checked. */
 	/*
 	 * Determine if the mountpoint is empty.  If so, refuse to perform the
 	 * mount.  We don't perform this check if MS_OVERLAY is specified, which
@@ -507,7 +507,7 @@ zfs_is_shared_smb(zfs_handle_t *zhp, char **where)
  * initialized in _zfs_init_libshare() are actually present.
  */
 
-#ifdef sun
+#ifdef illumos
 static sa_handle_t (*_sa_init)(int);
 static void (*_sa_fini)(sa_handle_t);
 static sa_share_t (*_sa_find_share)(sa_handle_t, char *);
@@ -534,7 +534,7 @@ static void (*_sa_update_sharetab_ts)(sa_handle_t);
 static void
 _zfs_init_libshare(void)
 {
-#ifdef sun
+#ifdef illumos
 	void *libshare;
 	char path[MAXPATHLEN];
 	char isa[MAXISALEN];
@@ -605,7 +605,7 @@ zfs_init_libshare(libzfs_handle_t *zhandle, int service)
 {
 	int ret = SA_OK;
 
-#ifdef sun
+#ifdef illumos
 	if (_sa_init == NULL)
 		ret = SA_CONFIG_ERR;
 
@@ -646,7 +646,7 @@ void
 zfs_uninit_libshare(libzfs_handle_t *zhandle)
 {
 	if (zhandle != NULL && zhandle->libzfs_sharehdl != NULL) {
-#ifdef sun
+#ifdef illumos
 		if (_sa_fini != NULL)
 			_sa_fini(zhandle->libzfs_sharehdl);
 #endif
@@ -663,7 +663,7 @@ zfs_uninit_libshare(libzfs_handle_t *zhandle)
 int
 zfs_parse_options(char *options, zfs_share_proto_t proto)
 {
-#ifdef sun
+#ifdef illumos
 	if (_sa_parse_legacy_options != NULL) {
 		return (_sa_parse_legacy_options(NULL, options,
 		    proto_table[proto].p_name));
@@ -674,7 +674,7 @@ zfs_parse_options(char *options, zfs_share_proto_t proto)
 #endif
 }
 
-#ifdef sun
+#ifdef illumos
 /*
  * zfs_sa_find_share(handle, path)
  *
@@ -716,7 +716,7 @@ zfs_sa_disable_share(sa_share_t share, char *proto)
 		return (_sa_disable_share(share, proto));
 	return (SA_CONFIG_ERR);
 }
-#endif	/* sun */
+#endif	/* illumos */
 
 /*
  * Share the given filesystem according to the options in the specified
@@ -767,7 +767,7 @@ zfs_share_proto(zfs_handle_t *zhp, zfs_share_proto_t *proto)
 		if (zfs_prop_get_int(zhp, ZFS_PROP_ZONED))
 			continue;
 
-#ifdef sun
+#ifdef illumos
 		share = zfs_sa_find_share(hdl->libzfs_sharehdl, mountpoint);
 		if (share == NULL) {
 			/*
@@ -856,7 +856,7 @@ static int
 unshare_one(libzfs_handle_t *hdl, const char *name, const char *mountpoint,
     zfs_share_proto_t proto)
 {
-#ifdef sun
+#ifdef illumos
 	sa_share_t share;
 	int err;
 	char *mntpt;
diff --git a/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_pool.c b/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_pool.c
index b8f126cd8f7b..78a34f931d67 100644
--- a/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_pool.c
+++ b/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_pool.c
@@ -409,7 +409,7 @@ bootfs_name_valid(const char *pool, char *bootfs)
 static boolean_t
 pool_uses_efi(nvlist_t *config)
 {
-#ifdef sun
+#ifdef illumos
 	nvlist_t **child;
 	uint_t c, children;
 
@@ -421,7 +421,7 @@ pool_uses_efi(nvlist_t *config)
 		if (pool_uses_efi(child[c]))
 			return (B_TRUE);
 	}
-#endif	/* sun */
+#endif	/* illumos */
 	return (B_FALSE);
 }
 
@@ -575,7 +575,7 @@ zpool_valid_proplist(libzfs_handle_t *hdl, const char *poolname,
 			verify(nvlist_lookup_nvlist(zpool_get_config(zhp, NULL),
 			    ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0);
 
-#ifdef sun
+#ifdef illumos
 			/*
 			 * bootfs property cannot be set on a disk which has
 			 * been EFI labeled.
@@ -588,7 +588,7 @@ zpool_valid_proplist(libzfs_handle_t *hdl, const char *poolname,
 				zpool_close(zhp);
 				goto error;
 			}
-#endif	/* sun */
+#endif	/* illumos */
 			zpool_close(zhp);
 			break;
 
@@ -2384,7 +2384,7 @@ zpool_get_physpath(zpool_handle_t *zhp, char *physpath, size_t phypath_size)
 static int
 zpool_relabel_disk(libzfs_handle_t *hdl, const char *name)
 {
-#ifdef sun
+#ifdef illumos
 	char path[MAXPATHLEN];
 	char errbuf[1024];
 	int fd, error;
@@ -2414,7 +2414,7 @@ zpool_relabel_disk(libzfs_handle_t *hdl, const char *name)
 		    "relabel '%s': unable to read disk capacity"), name);
 		return (zfs_error(hdl, EZFS_NOCAP, errbuf));
 	}
-#endif	/* sun */
+#endif	/* illumos */
 	return (0);
 }
 
@@ -3470,7 +3470,7 @@ zpool_vdev_name(libzfs_handle_t *hdl, zpool_handle_t *zhp, nvlist_t *nv,
 				devid_str_free(newdevid);
 		}
 
-#ifdef sun
+#ifdef illumos
 		if (strncmp(path, "/dev/dsk/", 9) == 0)
 			path += 9;
 
@@ -3495,10 +3495,10 @@ zpool_vdev_name(libzfs_handle_t *hdl, zpool_handle_t *zhp, nvlist_t *nv,
 			}
 			return (tmp);
 		}
-#else	/* !sun */
+#else	/* !illumos */
 		if (strncmp(path, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0)
 			path += sizeof(_PATH_DEV) - 1;
-#endif	/* !sun */
+#endif	/* illumos */
 	} else {
 		verify(nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &path) == 0);
 
@@ -3888,7 +3888,7 @@ zpool_obj_to_path(zpool_handle_t *zhp, uint64_t dsobj, uint64_t obj,
 	free(mntpnt);
 }
 
-#ifdef sun
+#ifdef illumos
 /*
  * Read the EFI label from the config, if a label does not exist then
  * pass back the error to the caller. If the caller has passed a non-NULL
@@ -3953,7 +3953,7 @@ find_start_block(nvlist_t *config)
 	}
 	return (MAXOFFSET_T);
 }
-#endif /* sun */
+#endif /* illumos */
 
 /*
  * Label an individual disk.  The name provided is the short name,
@@ -3962,7 +3962,7 @@ find_start_block(nvlist_t *config)
 int
 zpool_label_disk(libzfs_handle_t *hdl, zpool_handle_t *zhp, const char *name)
 {
-#ifdef sun
+#ifdef illumos
 	char path[MAXPATHLEN];
 	struct dk_gpt *vtoc;
 	int fd;
@@ -4067,7 +4067,7 @@ zpool_label_disk(libzfs_handle_t *hdl, zpool_handle_t *zhp, const char *name)
 
 	(void) close(fd);
 	efi_free(vtoc);
-#endif /* sun */
+#endif /* illumos */
 	return (0);
 }
 
diff --git a/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_sendrecv.c b/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_sendrecv.c
index 91857b65a8d6..954adac6c239 100644
--- a/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_sendrecv.c
+++ b/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_sendrecv.c
@@ -949,7 +949,7 @@ dump_ioctl(zfs_handle_t *zhp, const char *fromsnap, uint64_t fromsnap_obj,
 		case EIO:
 		case ENOLINK:
 		case ENOSPC:
-#ifdef sun
+#ifdef illumos
 		case ENOSTR:
 #endif
 		case ENXIO:
diff --git a/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_util.c b/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_util.c
index 3b5991422155..427b2fd8dee4 100644
--- a/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_util.c
+++ b/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_util.c
@@ -687,7 +687,7 @@ libzfs_fini(libzfs_handle_t *hdl)
 		(void) fclose(hdl->libzfs_sharetab);
 	zfs_uninit_libshare(hdl);
 	zpool_free_handles(hdl);
-#ifdef sun
+#ifdef illumos
 	libzfs_fru_clear(hdl, B_TRUE);
 #endif
 	namespace_clear(hdl);
@@ -739,7 +739,7 @@ zfs_path_to_zhandle(libzfs_handle_t *hdl, char *path, zfs_type_t argtype)
 		return (NULL);
 	}
 
-#ifdef sun
+#ifdef illumos
 	rewind(hdl->libzfs_mnttab);
 	while ((ret = getextmntent(hdl->libzfs_mnttab, &entry, 0)) == 0) {
 		if (makedevice(entry.mnt_major, entry.mnt_minor) ==
@@ -759,7 +759,7 @@ zfs_path_to_zhandle(libzfs_handle_t *hdl, char *path, zfs_type_t argtype)
 			    strerror(errno));
 		}
 	}
-#endif	/* sun */
+#endif	/* illumos */
 	if (ret != 0) {
 		return (NULL);
 	}
diff --git a/cddl/contrib/opensolaris/tools/ctf/cvt/barrier.c b/cddl/contrib/opensolaris/tools/ctf/cvt/barrier.c
index bc278b063de1..c0719620dbde 100644
--- a/cddl/contrib/opensolaris/tools/ctf/cvt/barrier.c
+++ b/cddl/contrib/opensolaris/tools/ctf/cvt/barrier.c
@@ -38,7 +38,7 @@
  */
 
 #include <pthread.h>
-#if defined(sun)
+#ifdef illumos
 #include <synch.h>
 #endif
 #include <stdio.h>
@@ -49,7 +49,7 @@ void
 barrier_init(barrier_t *bar, int nthreads)
 {
 	pthread_mutex_init(&bar->bar_lock, NULL);
-#if defined(sun)
+#ifdef illumos
 	sema_init(&bar->bar_sem, 0, USYNC_THREAD, NULL);
 #else
 	sem_init(&bar->bar_sem, 0, 0);
@@ -66,7 +66,7 @@ barrier_wait(barrier_t *bar)
 
 	if (++bar->bar_numin < bar->bar_nthr) {
 		pthread_mutex_unlock(&bar->bar_lock);
-#if defined(sun)
+#ifdef illumos
 		sema_wait(&bar->bar_sem);
 #else
 		sem_wait(&bar->bar_sem);
@@ -80,7 +80,7 @@ barrier_wait(barrier_t *bar)
 		/* reset for next use */
 		bar->bar_numin = 0;
 		for (i = 1; i < bar->bar_nthr; i++)
-#if defined(sun)
+#ifdef illumos
 			sema_post(&bar->bar_sem);
 #else
 			sem_post(&bar->bar_sem);
diff --git a/cddl/contrib/opensolaris/tools/ctf/cvt/barrier.h b/cddl/contrib/opensolaris/tools/ctf/cvt/barrier.h
index c7e6212a69c5..babf2e64e33f 100644
--- a/cddl/contrib/opensolaris/tools/ctf/cvt/barrier.h
+++ b/cddl/contrib/opensolaris/tools/ctf/cvt/barrier.h
@@ -33,7 +33,7 @@
  * APIs for the barrier synchronization primitive.
  */
 
-#if defined(sun)
+#ifdef illumos
 #include <synch.h>
 #else
 #include <semaphore.h>
diff --git a/cddl/contrib/opensolaris/tools/ctf/cvt/ctfconvert.c b/cddl/contrib/opensolaris/tools/ctf/cvt/ctfconvert.c
index efe6c279a0b7..d40be25da27f 100644
--- a/cddl/contrib/opensolaris/tools/ctf/cvt/ctfconvert.c
+++ b/cddl/contrib/opensolaris/tools/ctf/cvt/ctfconvert.c
@@ -155,7 +155,7 @@ main(int argc, char **argv)
 	int keep_stabs = 0;
 	int c;
 
-#if defined(sun)
+#ifdef illumos
 	sighold(SIGINT);
 	sighold(SIGQUIT);
 	sighold(SIGTERM);
@@ -221,7 +221,7 @@ main(int argc, char **argv)
 	 */
 	set_terminate_cleanup(terminate_cleanup);
 
-#if defined(sun)
+#ifdef illumos
 	sigset(SIGINT, handle_sig);
 	sigset(SIGQUIT, handle_sig);
 	sigset(SIGTERM, handle_sig);
diff --git a/cddl/contrib/opensolaris/tools/ctf/cvt/ctfmerge.c b/cddl/contrib/opensolaris/tools/ctf/cvt/ctfmerge.c
index 3e030c7e251a..a3d05ad20b28 100644
--- a/cddl/contrib/opensolaris/tools/ctf/cvt/ctfmerge.c
+++ b/cddl/contrib/opensolaris/tools/ctf/cvt/ctfmerge.c
@@ -176,20 +176,20 @@
 #include <unistd.h>
 #include <pthread.h>
 #include <assert.h>
-#if defined(sun)
+#ifdef illumos
 #include <synch.h>
 #endif
 #include <signal.h>
 #include <libgen.h>
 #include <string.h>
 #include <errno.h>
-#if defined(sun)
+#ifdef illumos
 #include <alloca.h>
 #endif
 #include <sys/param.h>
 #include <sys/types.h>
 #include <sys/mman.h>
-#if defined(sun)
+#ifdef illumos
 #include <sys/sysconf.h>
 #endif
 
@@ -232,7 +232,7 @@ usage(void)
 	    progname, progname);
 }
 
-#if defined(sun)
+#ifdef illumos
 static void
 bigheap(void)
 {
@@ -280,7 +280,7 @@ bigheap(void)
 
 	(void) memcntl(NULL, 0, MC_HAT_ADVISE, (caddr_t)&mha, 0, 0);
 }
-#endif
+#endif	/* illumos */
 
 static void
 finalize_phase_one(workqueue_t *wq)
@@ -707,7 +707,7 @@ start_threads(workqueue_t *wq)
 		    (void *(*)(void *))worker_thread, wq);
 	}
 
-#if defined(sun)
+#ifdef illumos
 	sigset(SIGINT, handle_sig);
 	sigset(SIGQUIT, handle_sig);
 	sigset(SIGTERM, handle_sig);
diff --git a/cddl/contrib/opensolaris/tools/ctf/cvt/dwarf.c b/cddl/contrib/opensolaris/tools/ctf/cvt/dwarf.c
index 5dfeab3c0bea..b7cb66fee9ab 100644
--- a/cddl/contrib/opensolaris/tools/ctf/cvt/dwarf.c
+++ b/cddl/contrib/opensolaris/tools/ctf/cvt/dwarf.c
@@ -1390,7 +1390,7 @@ die_base_type2enc(dwarf_t *dw, Dwarf_Off off, Dwarf_Signed enc, size_t sz)
 		mult = 2;
 		col = 1;
 	} else if (enc == DW_ATE_imaginary_float
-#if defined(sun)
+#ifdef illumos
 	    || enc == DW_ATE_SUN_imaginary_float
 #endif
 	    )
@@ -1441,7 +1441,7 @@ die_base_from_dwarf(dwarf_t *dw, Dwarf_Die base, Dwarf_Off off, size_t sz)
 	case DW_ATE_float:
 	case DW_ATE_complex_float:
 	case DW_ATE_imaginary_float:
-#if defined(sun)
+#ifdef illumos
 	case DW_ATE_SUN_imaginary_float:
 	case DW_ATE_SUN_interval_float:
 #endif
diff --git a/cddl/contrib/opensolaris/tools/ctf/cvt/output.c b/cddl/contrib/opensolaris/tools/ctf/cvt/output.c
index af797690a259..3131e7fb85ee 100644
--- a/cddl/contrib/opensolaris/tools/ctf/cvt/output.c
+++ b/cddl/contrib/opensolaris/tools/ctf/cvt/output.c
@@ -576,7 +576,7 @@ write_file(Elf *src, const char *srcname, Elf *dst, const char *dstname,
 			    shdr.sh_name);
 		}
 
-#if !defined(sun)
+#ifndef illumos
 		if (gelf_update_shdr(dscn, &shdr) == 0)
 			elfterminate(dstname, "Cannot update sect %s", sname);
 #endif
@@ -585,7 +585,7 @@ write_file(Elf *src, const char *srcname, Elf *dst, const char *dstname,
 			elfterminate(srcname, "Cannot get sect %s data", sname);
 		if ((ddata = elf_newdata(dscn)) == NULL)
 			elfterminate(dstname, "Can't make sect %s data", sname);
-#if defined(sun)
+#ifdef illumos
 		bcopy(sdata, ddata, sizeof (Elf_Data));
 #else
 		/*
@@ -645,7 +645,7 @@ write_file(Elf *src, const char *srcname, Elf *dst, const char *dstname,
 			}
 		}
 
-#if !defined(sun)
+#ifndef illumos
 		if (ddata->d_buf == NULL && sdata->d_buf != NULL) {
 			ddata->d_buf = xmalloc(shdr.sh_size);
 			bcopy(sdata->d_buf, ddata->d_buf, shdr.sh_size);
diff --git a/cddl/contrib/opensolaris/tools/ctf/cvt/tdata.c b/cddl/contrib/opensolaris/tools/ctf/cvt/tdata.c
index 1ccd6cde5f59..d1a1ad0e7d05 100644
--- a/cddl/contrib/opensolaris/tools/ctf/cvt/tdata.c
+++ b/cddl/contrib/opensolaris/tools/ctf/cvt/tdata.c
@@ -173,7 +173,7 @@ tdesc_namecmp(void *arg1, void *arg2)
 	return (!streq(tdp1->t_name, tdp2->t_name));
 }
 
-#if defined(sun)
+#ifdef illumos
 /*ARGSUSED1*/
 static int
 tdesc_print(void *data, void *private __unused)
diff --git a/cddl/contrib/opensolaris/tools/ctf/cvt/util.c b/cddl/contrib/opensolaris/tools/ctf/cvt/util.c
index 82dfe63ad579..fb76cbaeb422 100644
--- a/cddl/contrib/opensolaris/tools/ctf/cvt/util.c
+++ b/cddl/contrib/opensolaris/tools/ctf/cvt/util.c
@@ -171,7 +171,7 @@ aborterr(const char *format, ...)
 	whine("ERROR", format, ap);
 	va_end(ap);
 
-#if defined(sun)
+#ifdef illumos
 	abort();
 #else
 	exit(0);
diff --git a/sys/cddl/contrib/opensolaris/common/util/strtolctype.h b/sys/cddl/contrib/opensolaris/common/util/strtolctype.h
index a1d18367d345..91609cede4e1 100644
--- a/sys/cddl/contrib/opensolaris/common/util/strtolctype.h
+++ b/sys/cddl/contrib/opensolaris/common/util/strtolctype.h
@@ -44,7 +44,7 @@ extern "C" {
  * safe in probe context.
  */
 
-#if defined(sun) &&	(defined(_KERNEL) || defined(_BOOT))
+#if defined(illumos) && (defined(_KERNEL) || defined(_BOOT))
 
 #define	isalnum(ch)	(isalpha(ch) || isdigit(ch))
 #define	isalpha(ch)	(isupper(ch) || islower(ch))
diff --git a/sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c b/sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c
index 884defaa7c56..f5a5b6391e5b 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c
+++ b/sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c
@@ -67,42 +67,42 @@
  * on capital-f functions.
  */
 #include <sys/errno.h>
-#if !defined(sun)
+#ifndef illumos
 #include <sys/time.h>
 #endif
 #include <sys/stat.h>
 #include <sys/modctl.h>
 #include <sys/conf.h>
 #include <sys/systm.h>
-#if defined(sun)
+#ifdef illumos
 #include <sys/ddi.h>
 #include <sys/sunddi.h>
 #endif
 #include <sys/cpuvar.h>
 #include <sys/kmem.h>
-#if defined(sun)
+#ifdef illumos
 #include <sys/strsubr.h>
 #endif
 #include <sys/sysmacros.h>
 #include <sys/dtrace_impl.h>
 #include <sys/atomic.h>
 #include <sys/cmn_err.h>
-#if defined(sun)
+#ifdef illumos
 #include <sys/mutex_impl.h>
 #include <sys/rwlock_impl.h>
 #endif
 #include <sys/ctf_api.h>
-#if defined(sun)
+#ifdef illumos
 #include <sys/panic.h>
 #include <sys/priv_impl.h>
 #endif
 #include <sys/policy.h>
-#if defined(sun)
+#ifdef illumos
 #include <sys/cred_impl.h>
 #include <sys/procfs_isa.h>
 #endif
 #include <sys/taskq.h>
-#if defined(sun)
+#ifdef illumos
 #include <sys/mkdev.h>
 #include <sys/kdi.h>
 #endif
@@ -112,7 +112,7 @@
 #include "strtolctype.h"
 
 /* FreeBSD includes: */
-#if !defined(sun)
+#ifndef illumos
 #include <sys/callout.h>
 #include <sys/ctype.h>
 #include <sys/eventhandler.h>
@@ -184,7 +184,7 @@ hrtime_t	dtrace_deadman_interval = NANOSEC;
 hrtime_t	dtrace_deadman_timeout = (hrtime_t)10 * NANOSEC;
 hrtime_t	dtrace_deadman_user = (hrtime_t)30 * NANOSEC;
 hrtime_t	dtrace_unregister_defunct_reap = (hrtime_t)60 * NANOSEC;
-#if !defined(sun)
+#ifndef illumos
 int		dtrace_memstr_max = 4096;
 #endif
 
@@ -202,10 +202,10 @@ const char	dtrace_zero[256] = { 0 };	/* zero-filled memory */
 /*
  * DTrace Internal Variables
  */
-#if defined(sun)
+#ifdef illumos
 static dev_info_t	*dtrace_devi;		/* device info */
 #endif
-#if defined(sun)
+#ifdef illumos
 static vmem_t		*dtrace_arena;		/* probe ID arena */
 static vmem_t		*dtrace_minor;		/* minor number arena */
 #else
@@ -219,7 +219,7 @@ static dtrace_meta_t	*dtrace_meta_pid;	/* user-land meta provider */
 static int		dtrace_opens;		/* number of opens */
 static int		dtrace_helpers;		/* number of helpers */
 static int		dtrace_getf;		/* number of unpriv getf()s */
-#if defined(sun)
+#ifdef illumos
 static void		*dtrace_softstate;	/* softstate pointer */
 #endif
 static dtrace_hash_t	*dtrace_bymod;		/* probes hashed by module */
@@ -239,7 +239,7 @@ static dtrace_enabling_t *dtrace_retained;	/* list of retained enablings */
 static dtrace_genid_t	dtrace_retained_gen;	/* current retained enab gen */
 static dtrace_dynvar_t	dtrace_dynhash_sink;	/* end of dynamic hash chains */
 static int		dtrace_dynvar_failclean; /* dynvars failed to clean */
-#if !defined(sun)
+#ifndef illumos
 static struct mtx	dtrace_unr_mtx;
 MTX_SYSINIT(dtrace_unr_mtx, &dtrace_unr_mtx, "Unique resource identifier", MTX_DEF);
 int		dtrace_in_probe;	/* non-zero if executing a probe */
@@ -284,7 +284,7 @@ static kmutex_t		dtrace_lock;		/* probe state lock */
 static kmutex_t		dtrace_provider_lock;	/* provider state lock */
 static kmutex_t		dtrace_meta_lock;	/* meta-provider state lock */
 
-#if !defined(sun)
+#ifndef illumos
 /* XXX FreeBSD hacks. */
 #define cr_suid		cr_svuid
 #define cr_sgid		cr_svgid
@@ -309,7 +309,7 @@ SYSCTL_DECL(_debug_dtrace);
 SYSCTL_DECL(_kern_dtrace);
 #endif
 
-#if defined(sun)
+#ifdef illumos
 #define curcpu	CPU->cpu_id
 #endif
 
@@ -419,7 +419,7 @@ static kmutex_t dtrace_errlock;
  * no way for a global variable key signature to match a thread-local key
  * signature.
  */
-#if defined(sun)
+#ifdef illumos
 #define	DTRACE_TLS_THRKEY(where) { \
 	uint_t intr = 0; \
 	uint_t actv = CPU->cpu_intr_actv >> (LOCK_LEVEL + 1); \
@@ -848,7 +848,7 @@ dtrace_canload(uint64_t addr, size_t sz, dtrace_mstate_t *mstate,
 			return (1);
 		}
 
-#if defined(sun)
+#ifdef illumos
 		if (p != NULL && p->p_pidp != NULL && DTRACE_INRANGE(addr, sz,
 		    &(p->p_pidp->pid_id), sizeof (pid_t))) {
 			return (1);
@@ -882,7 +882,7 @@ dtrace_canload(uint64_t addr, size_t sz, dtrace_mstate_t *mstate,
 			return (1);
 
 		if ((vp = fp->f_vnode) != NULL) {
-#if defined(sun)
+#ifdef illumos
 			if (DTRACE_INRANGE(addr, sz, &vp->v_path, psz))
 				return (1);
 			if (vp->v_path != NULL && DTRACE_INRANGE(addr, sz,
@@ -894,7 +894,7 @@ dtrace_canload(uint64_t addr, size_t sz, dtrace_mstate_t *mstate,
 			if (DTRACE_INRANGE(addr, sz, &vp->v_op, psz))
 				return (1);
 
-#if defined(sun)
+#ifdef illumos
 			if ((op = vp->v_op) != NULL &&
 			    DTRACE_INRANGE(addr, sz, &op->vnop_name, psz)) {
 				return (1);
@@ -1331,7 +1331,7 @@ dtrace_priv_proc_common_user(dtrace_state_t *state)
 static int
 dtrace_priv_proc_common_zone(dtrace_state_t *state)
 {
-#if defined(sun)
+#ifdef illumos
 	cred_t *cr, *s_cr = state->dts_cred.dcr_cred;
 
 	/*
@@ -1456,7 +1456,7 @@ dtrace_priv_probe(dtrace_state_t *state, dtrace_mstate_t *mstate,
 
 	ASSERT(ecb->dte_cond);
 
-#if defined(sun)
+#ifdef illumos
 	if (pops->dtps_mode != NULL) {
 		mode = pops->dtps_mode(prov->dtpv_arg,
 		    probe->dtpr_id, probe->dtpr_arg);
@@ -1515,13 +1515,13 @@ dtrace_priv_probe(dtrace_state_t *state, dtrace_mstate_t *mstate,
 			if (mode & DTRACE_MODE_NOPRIV_DROP)
 				return (0);
 
-#if defined(sun)
+#ifdef illumos
 			mstate->dtms_access &= ~DTRACE_ACCESS_PROC;
 #endif
 		}
 	}
 
-#if defined(sun)
+#ifdef illumos
 	/*
 	 * If our dte_cond is set to DTRACE_COND_ZONEOWNER and we are not
 	 * in our zone, check to see if our mode policy is to restrict rather
@@ -3181,7 +3181,7 @@ dtrace_dif_variable(dtrace_mstate_t *mstate, dtrace_state_t *state, uint64_t v,
 
 		return (mstate->dtms_arg[ndx]);
 
-#if defined(sun)
+#ifdef illumos
 	case DIF_VAR_UREGS: {
 		klwp_t *lwp;
 
@@ -3237,7 +3237,7 @@ dtrace_dif_variable(dtrace_mstate_t *mstate, dtrace_state_t *state, uint64_t v,
 		}
 		return (mstate->dtms_walltimestamp);
 
-#if defined(sun)
+#ifdef illumos
 	case DIF_VAR_IPL:
 		if (!dtrace_priv_kernel(state))
 			return (0);
@@ -3374,7 +3374,7 @@ dtrace_dif_variable(dtrace_mstate_t *mstate, dtrace_state_t *state, uint64_t v,
 		if (!dtrace_priv_proc(state))
 			return (0);
 
-#if defined(sun)
+#ifdef illumos
 		/*
 		 * Note that we are assuming that an unanchored probe is
 		 * always due to a high-level interrupt.  (And we're assuming
@@ -3400,7 +3400,7 @@ dtrace_dif_variable(dtrace_mstate_t *mstate, dtrace_state_t *state, uint64_t v,
 		if (!dtrace_priv_proc(state))
 			return (0);
 
-#if defined(sun)
+#ifdef illumos
 		/*
 		 * See comment in DIF_VAR_PID.
 		 */
@@ -3422,7 +3422,7 @@ dtrace_dif_variable(dtrace_mstate_t *mstate, dtrace_state_t *state, uint64_t v,
 #endif
 
 	case DIF_VAR_TID:
-#if defined(sun)
+#ifdef illumos
 		/*
 		 * See comment in DIF_VAR_PID.
 		 */
@@ -3443,7 +3443,7 @@ dtrace_dif_variable(dtrace_mstate_t *mstate, dtrace_state_t *state, uint64_t v,
 	}
 
 	case DIF_VAR_EXECNAME:
-#if defined(sun)
+#ifdef illumos
 		if (!dtrace_priv_proc(state))
 			return (0);
 
@@ -3468,7 +3468,7 @@ dtrace_dif_variable(dtrace_mstate_t *mstate, dtrace_state_t *state, uint64_t v,
 #endif
 
 	case DIF_VAR_ZONENAME:
-#if defined(sun)
+#ifdef illumos
 		if (!dtrace_priv_proc(state))
 			return (0);
 
@@ -3495,7 +3495,7 @@ dtrace_dif_variable(dtrace_mstate_t *mstate, dtrace_state_t *state, uint64_t v,
 		if (!dtrace_priv_proc(state))
 			return (0);
 
-#if defined(sun)
+#ifdef illumos
 		/*
 		 * See comment in DIF_VAR_PID.
 		 */
@@ -3518,7 +3518,7 @@ dtrace_dif_variable(dtrace_mstate_t *mstate, dtrace_state_t *state, uint64_t v,
 		if (!dtrace_priv_proc(state))
 			return (0);
 
-#if defined(sun)
+#ifdef illumos
 		/*
 		 * See comment in DIF_VAR_PID.
 		 */
@@ -3538,7 +3538,7 @@ dtrace_dif_variable(dtrace_mstate_t *mstate, dtrace_state_t *state, uint64_t v,
 		return ((uint64_t)curthread->t_procp->p_cred->cr_gid);
 
 	case DIF_VAR_ERRNO: {
-#if defined(sun)
+#ifdef illumos
 		klwp_t *lwp;
 		if (!dtrace_priv_proc(state))
 			return (0);
@@ -3563,7 +3563,7 @@ dtrace_dif_variable(dtrace_mstate_t *mstate, dtrace_state_t *state, uint64_t v,
 		return (curthread->td_errno);
 #endif
 	}
-#if !defined(sun)
+#ifndef illumos
 	case DIF_VAR_CPU: {
 		return curcpu;
 	}
@@ -4047,7 +4047,7 @@ dtrace_dif_subr(uint_t subr, uint_t rd, uint64_t *regs,
 	volatile uintptr_t *illval = &cpu_core[curcpu].cpuc_dtrace_illval;
 	dtrace_vstate_t *vstate = &state->dts_vstate;
 
-#if defined(sun)
+#ifdef illumos
 	union {
 		mutex_impl_t mi;
 		uint64_t mx;
@@ -4070,7 +4070,7 @@ dtrace_dif_subr(uint_t subr, uint_t rd, uint64_t *regs,
 		regs[rd] = (dtrace_gethrtime() * 2416 + 374441) % 1771875;
 		break;
 
-#if defined(sun)
+#ifdef illumos
 	case DIF_SUBR_MUTEX_OWNED:
 		if (!dtrace_canload(tupregs[0].dttk_value, sizeof (kmutex_t),
 		    mstate, vstate)) {
@@ -4158,7 +4158,7 @@ dtrace_dif_subr(uint_t subr, uint_t rd, uint64_t *regs,
 		regs[rd] = _RW_ISWRITER(&r.ri);
 		break;
 
-#else
+#else /* !illumos */
 	case DIF_SUBR_MUTEX_OWNED:
 		if (!dtrace_canload(tupregs[0].dttk_value,
 			sizeof (struct lock_object), mstate, vstate)) {
@@ -4237,7 +4237,7 @@ dtrace_dif_subr(uint_t subr, uint_t rd, uint64_t *regs,
 		regs[rd] = LOCK_CLASS(l.li)->lc_owner(l.li, &lowner) &&
 		    lowner != NULL;
 		break;
-#endif /* ! defined(sun) */
+#endif /* illumos */
 
 	case DIF_SUBR_BCOPY: {
 		/*
@@ -4347,7 +4347,7 @@ dtrace_dif_subr(uint_t subr, uint_t rd, uint64_t *regs,
 		break;
 	}
 
-#if defined(sun)
+#ifdef illumos
 	case DIF_SUBR_MSGSIZE:
 	case DIF_SUBR_MSGDSIZE: {
 		uintptr_t baddr = tupregs[0].dttk_value, daddr;
@@ -4415,7 +4415,7 @@ dtrace_dif_subr(uint_t subr, uint_t rd, uint64_t *regs,
 		DTRACE_CPUFLAG_SET(CPU_DTRACE_NOFAULT);
 
 		for (p = curthread->t_procp; p != NULL; p = p->p_parent) {
-#if defined(sun)
+#ifdef illumos
 			if (p->p_pidp->pid_id == pid) {
 #else
 			if (p->p_pid == pid) {
@@ -4933,7 +4933,7 @@ dtrace_dif_subr(uint_t subr, uint_t rd, uint64_t *regs,
 		break;
 	}
 
-#if defined(sun)
+#ifdef illumos
 	case DIF_SUBR_GETMAJOR:
 #ifdef _LP64
 		regs[rd] = (tupregs[0].dttk_value >> NBITSMINOR64) & MAXMAJ64;
@@ -5449,7 +5449,7 @@ dtrace_dif_subr(uint_t subr, uint_t rd, uint64_t *regs,
 		uint64_t size = state->dts_options[DTRACEOPT_STRSIZE];
 		uintptr_t src = tupregs[0].dttk_value;
 		int i = 0, j = 0;
-#if defined(sun)
+#ifdef illumos
 		zone_t *z;
 #endif
 
@@ -5551,7 +5551,7 @@ next:
 
 		dest[j] = '\0';
 
-#if defined(sun)
+#ifdef illumos
 		if (mstate->dtms_getf != NULL &&
 		    !(mstate->dtms_access & DTRACE_ACCESS_KERNEL) &&
 		    (z = state->dts_cred.dcr_cred->cr_zone) != kcred->cr_zone) {
@@ -5674,7 +5674,7 @@ next:
 			tryzero = -1;
 			numzero = 1;
 			for (i = 0; i < sizeof (struct in6_addr); i++) {
-#if defined(sun)
+#ifdef illumos
 				if (ip6._S6_un._S6_u8[i] == 0 &&
 #else
 				if (ip6.__u6_addr.__u6_addr8[i] == 0 &&
@@ -5685,7 +5685,7 @@ next:
 				}
 
 				if (tryzero != -1 &&
-#if defined(sun)
+#ifdef illumos
 				    (ip6._S6_un._S6_u8[i] != 0 ||
 #else
 				    (ip6.__u6_addr.__u6_addr8[i] != 0 ||
@@ -5701,7 +5701,7 @@ next:
 					numzero = i - i % 2 - tryzero;
 					tryzero = -1;
 
-#if defined(sun)
+#ifdef illumos
 					if (ip6._S6_un._S6_u8[i] == 0 &&
 #else
 					if (ip6.__u6_addr.__u6_addr8[i] == 0 &&
@@ -5722,7 +5722,7 @@ next:
 				    i >= DTRACE_V4MAPPED_OFFSET; i--) {
 					ASSERT(end >= base);
 
-#if defined(sun)
+#ifdef illumos
 					val = ip6._S6_un._S6_u8[i];
 #else
 					val = ip6.__u6_addr.__u6_addr8[i];
@@ -5767,7 +5767,7 @@ next:
 				if (i < 14 && i != firstzero - 2)
 					*end-- = ':';
 
-#if defined(sun)
+#ifdef illumos
 				val = (ip6._S6_un._S6_u8[i] << 8) +
 				    ip6._S6_un._S6_u8[i + 1];
 #else
@@ -5813,7 +5813,7 @@ inetout:	regs[rd] = (uintptr_t)end + 1;
 		break;
 	}
 
-#if !defined(sun)
+#ifndef illumos
 	case DIF_SUBR_MEMSTR: {
 		char *str = (char *)mstate->dtms_scratch_ptr;
 		uintptr_t mem = tupregs[0].dttk_value;
@@ -6713,7 +6713,7 @@ dtrace_action_breakpoint(dtrace_ecb_t *ecb)
 	c[i++] = ')';
 	c[i] = '\0';
 
-#if defined(sun)
+#ifdef illumos
 	debug_enter(c);
 #else
 	kdb_enter(KDB_WHY_DTRACE, "breakpoint action");
@@ -6760,7 +6760,7 @@ dtrace_action_raise(uint64_t sig)
 		return;
 	}
 
-#if defined(sun)
+#ifdef illumos
 	/*
 	 * raise() has a queue depth of 1 -- we ignore all subsequent
 	 * invocations of the raise() action.
@@ -6784,7 +6784,7 @@ dtrace_action_stop(void)
 	if (dtrace_destructive_disallow)
 		return;
 
-#if defined(sun)
+#ifdef illumos
 	if (!curthread->t_dtrace_stop) {
 		curthread->t_dtrace_stop = 1;
 		curthread->t_sig_check = 1;
@@ -6803,7 +6803,7 @@ dtrace_action_chill(dtrace_mstate_t *mstate, hrtime_t val)
 {
 	hrtime_t now;
 	volatile uint16_t *flags;
-#if defined(sun)
+#ifdef illumos
 	cpu_t *cpu = CPU;
 #else
 	cpu_t *cpu = &solaris_cpu[curcpu];
@@ -7041,7 +7041,7 @@ dtrace_probe(dtrace_id_t id, uintptr_t arg0, uintptr_t arg1,
 	if (panicstr != NULL)
 		return;
 
-#if defined(sun)
+#ifdef illumos
 	/*
 	 * Kick out immediately if this CPU is still being born (in which case
 	 * curthread will be set to -1) or the current thread can't allow
@@ -7066,7 +7066,7 @@ dtrace_probe(dtrace_id_t id, uintptr_t arg0, uintptr_t arg1,
 		return;
 	}
 
-#if defined(sun)
+#ifdef illumos
 	if (panic_quiesce) {
 #else
 	if (panicstr != NULL) {
@@ -7172,7 +7172,7 @@ dtrace_probe(dtrace_id_t id, uintptr_t arg0, uintptr_t arg1,
 			    probe->dtpr_id, probe->dtpr_arg) == 0)
 				continue;
 
-#if defined(sun)
+#ifdef illumos
 			/*
 			 * This is more subtle than it looks. We have to be
 			 * absolutely certain that CRED() isn't going to
@@ -7597,7 +7597,7 @@ dtrace_probe(dtrace_id_t id, uintptr_t arg0, uintptr_t arg1,
 			case DTRACEACT_USYM:
 			case DTRACEACT_UMOD:
 			case DTRACEACT_UADDR: {
-#if defined(sun)
+#ifdef illumos
 				struct pid *pid = curthread->t_procp->p_pidp;
 #endif
 
@@ -7605,7 +7605,7 @@ dtrace_probe(dtrace_id_t id, uintptr_t arg0, uintptr_t arg1,
 					continue;
 
 				DTRACE_STORE(uint64_t, tomax,
-#if defined(sun)
+#ifdef illumos
 				    valoffs, (uint64_t)pid->pid_id);
 #else
 				    valoffs, (uint64_t) curproc->p_pid);
@@ -8030,7 +8030,7 @@ dtrace_cred2priv(cred_t *cr, uint32_t *privp, uid_t *uidp, zoneid_t *zoneidp)
 {
 	uint32_t priv;
 
-#if defined(sun)
+#ifdef illumos
 	if (cr == NULL || PRIV_POLICY_ONLY(cr, PRIV_ALL, B_FALSE)) {
 		/*
 		 * For DTRACE_PRIV_ALL, the uid and zoneid don't matter.
@@ -8624,7 +8624,7 @@ dtrace_unregister(dtrace_provider_id_t id)
 		 * already held.
 		 */
 		ASSERT(old == dtrace_provider);
-#if defined(sun)
+#ifdef illumos
 		ASSERT(dtrace_devi != NULL);
 #endif
 		ASSERT(MUTEX_HELD(&dtrace_provider_lock));
@@ -8639,7 +8639,7 @@ dtrace_unregister(dtrace_provider_id_t id)
 		}
 	} else {
 		mutex_enter(&dtrace_provider_lock);
-#if defined(sun)
+#ifdef illumos
 		mutex_enter(&mod_lock);
 #endif
 		mutex_enter(&dtrace_lock);
@@ -8655,7 +8655,7 @@ dtrace_unregister(dtrace_provider_id_t id)
 	    dtrace_anon.dta_state->dts_necbs > 0))) {
 		if (!self) {
 			mutex_exit(&dtrace_lock);
-#if defined(sun)
+#ifdef illumos
 			mutex_exit(&mod_lock);
 #endif
 			mutex_exit(&dtrace_provider_lock);
@@ -8691,7 +8691,7 @@ dtrace_unregister(dtrace_provider_id_t id)
 
 		if (!self) {
 			mutex_exit(&dtrace_lock);
-#if defined(sun)
+#ifdef illumos
 			mutex_exit(&mod_lock);
 #endif
 			mutex_exit(&dtrace_provider_lock);
@@ -8747,7 +8747,7 @@ dtrace_unregister(dtrace_provider_id_t id)
 		kmem_free(probe->dtpr_mod, strlen(probe->dtpr_mod) + 1);
 		kmem_free(probe->dtpr_func, strlen(probe->dtpr_func) + 1);
 		kmem_free(probe->dtpr_name, strlen(probe->dtpr_name) + 1);
-#if defined(sun)
+#ifdef illumos
 		vmem_free(dtrace_arena, (void *)(uintptr_t)(probe->dtpr_id), 1);
 #else
 		free_unr(dtrace_arena, probe->dtpr_id);
@@ -8756,7 +8756,7 @@ dtrace_unregister(dtrace_provider_id_t id)
 	}
 
 	if ((prev = dtrace_provider) == old) {
-#if defined(sun)
+#ifdef illumos
 		ASSERT(self || dtrace_devi == NULL);
 		ASSERT(old->dtpv_next == NULL || dtrace_devi == NULL);
 #endif
@@ -8775,7 +8775,7 @@ dtrace_unregister(dtrace_provider_id_t id)
 
 	if (!self) {
 		mutex_exit(&dtrace_lock);
-#if defined(sun)
+#ifdef illumos
 		mutex_exit(&mod_lock);
 #endif
 		mutex_exit(&dtrace_provider_lock);
@@ -8868,7 +8868,7 @@ dtrace_condense(dtrace_provider_id_t id)
 		kmem_free(probe->dtpr_func, strlen(probe->dtpr_func) + 1);
 		kmem_free(probe->dtpr_name, strlen(probe->dtpr_name) + 1);
 		kmem_free(probe, sizeof (dtrace_probe_t));
-#if defined(sun)
+#ifdef illumos
 		vmem_free(dtrace_arena, (void *)((uintptr_t)i + 1), 1);
 #else
 		free_unr(dtrace_arena, i + 1);
@@ -8908,7 +8908,7 @@ dtrace_probe_create(dtrace_provider_id_t prov, const char *mod,
 		mutex_enter(&dtrace_lock);
 	}
 
-#if defined(sun)
+#ifdef illumos
 	id = (dtrace_id_t)(uintptr_t)vmem_alloc(dtrace_arena, 1,
 	    VM_BESTFIT | VM_SLEEP);
 #else
@@ -9079,7 +9079,7 @@ dtrace_probe_description(const dtrace_probe_t *prp, dtrace_probedesc_t *pdp)
 static void
 dtrace_probe_provide(dtrace_probedesc_t *desc, dtrace_provider_t *prv)
 {
-#if defined(sun)
+#ifdef illumos
 	modctl_t *ctl;
 #endif
 	int all = 0;
@@ -9097,7 +9097,7 @@ dtrace_probe_provide(dtrace_probedesc_t *desc, dtrace_provider_t *prv)
 		 */
 		prv->dtpv_pops.dtps_provide(prv->dtpv_arg, desc);
 
-#if defined(sun)
+#ifdef illumos
 		/*
 		 * Now call the per-module provide operation.  We will grab
 		 * mod_lock to prevent the list from being modified.  Note
@@ -9120,7 +9120,7 @@ dtrace_probe_provide(dtrace_probedesc_t *desc, dtrace_provider_t *prv)
 	} while (all && (prv = prv->dtpv_next) != NULL);
 }
 
-#if defined(sun)
+#ifdef illumos
 /*
  * Iterate over each probe, and call the Framework-to-Provider API function
  * denoted by offs.
@@ -10078,7 +10078,7 @@ dtrace_difo_validate_helper(dtrace_difo_t *dp)
 			    subr == DIF_SUBR_NTOHL ||
 			    subr == DIF_SUBR_NTOHLL ||
 			    subr == DIF_SUBR_MEMREF ||
-#if !defined(sun)
+#ifndef illumos
 			    subr == DIF_SUBR_MEMSTR ||
 #endif
 			    subr == DIF_SUBR_TYPEREF)
@@ -10716,7 +10716,7 @@ dtrace_actdesc_create(dtrace_actkind_t kind, uint32_t ntuple,
 {
 	dtrace_actdesc_t *act;
 
-#if defined(sun)
+#ifdef illumos
 	ASSERT(!DTRACEACT_ISPRINTFLIKE(kind) || (arg != NULL &&
 	    arg >= KERNELBASE) || (arg == NULL && kind == DTRACEACT_PRINTA));
 #endif
@@ -10755,7 +10755,7 @@ dtrace_actdesc_release(dtrace_actdesc_t *act, dtrace_vstate_t *vstate)
 	if (DTRACEACT_ISPRINTFLIKE(kind)) {
 		char *str = (char *)(uintptr_t)act->dtad_arg;
 
-#if defined(sun)
+#ifdef illumos
 		ASSERT((str != NULL && (uintptr_t)str >= KERNELBASE) ||
 		    (str == NULL && act->dtad_kind == DTRACEACT_PRINTA));
 #endif
@@ -11114,7 +11114,7 @@ success:
 	/*
 	 * We need to allocate an id for this aggregation.
 	 */
-#if defined(sun)
+#ifdef illumos
 	aggid = (dtrace_aggid_t)(uintptr_t)vmem_alloc(state->dts_aggid_arena, 1,
 	    VM_BESTFIT | VM_SLEEP);
 #else
@@ -11168,7 +11168,7 @@ dtrace_ecb_aggregation_destroy(dtrace_ecb_t *ecb, dtrace_action_t *act)
 	dtrace_aggid_t aggid = agg->dtag_id;
 
 	ASSERT(DTRACEACT_ISAGG(act->dta_kind));
-#if defined(sun)
+#ifdef illumos
 	vmem_free(state->dts_aggid_arena, (void *)(uintptr_t)aggid, 1);
 #else
 	free_unr(state->dts_aggid_arena, aggid);
@@ -11237,7 +11237,7 @@ dtrace_ecb_action_add(dtrace_ecb_t *ecb, dtrace_actdesc_t *desc)
 				format = 0;
 			} else {
 				ASSERT(arg != 0);
-#if defined(sun)
+#ifdef illumos
 				ASSERT(arg > KERNELBASE);
 #endif
 				format = dtrace_format_add(state,
@@ -11789,13 +11789,13 @@ static int
 dtrace_buffer_alloc(dtrace_buffer_t *bufs, size_t size, int flags,
     processorid_t cpu, int *factor)
 {
-#if defined(sun)
+#ifdef illumos
 	cpu_t *cp;
 #endif
 	dtrace_buffer_t *buf;
 	int allocated = 0, desired = 0;
 
-#if defined(sun)
+#ifdef illumos
 	ASSERT(MUTEX_HELD(&cpu_lock));
 	ASSERT(MUTEX_HELD(&dtrace_lock));
 
@@ -12666,7 +12666,7 @@ dtrace_enabling_matchall(void)
 	 * block pending our completion.
 	 */
 	for (enab = dtrace_retained; enab != NULL; enab = enab->dten_next) {
-#if defined(sun)
+#ifdef illumos
 		cred_t *cr = enab->dten_vstate->dtvs_state->dts_cred.dcr_cred;
 
 		if (INGLOBALZONE(curproc) ||
@@ -12971,7 +12971,7 @@ dtrace_dof_copyin(uintptr_t uarg, int *errp)
 	return (dof);
 }
 
-#if !defined(sun)
+#ifndef illumos
 static __inline uchar_t
 dtrace_dof_char(char c) {
 	switch (c) {
@@ -13014,7 +13014,7 @@ dtrace_dof_property(const char *name)
 	unsigned int len, i;
 	dof_hdr_t *dof;
 
-#if defined(sun)
+#ifdef illumos
 	/*
 	 * Unfortunately, array of values in .conf files are always (and
 	 * only) interpreted to be integer arrays.  We must read our DOF
@@ -13970,7 +13970,7 @@ dtrace_dstate_init(dtrace_dstate_t *dstate, size_t size)
 	maxper = (limit - (uintptr_t)start) / NCPU;
 	maxper = (maxper / dstate->dtds_chunksize) * dstate->dtds_chunksize;
 
-#if !defined(sun)
+#ifndef illumos
 	CPU_FOREACH(i) {
 #else
 	for (i = 0; i < NCPU; i++) {
@@ -14050,7 +14050,7 @@ dtrace_vstate_fini(dtrace_vstate_t *vstate)
 	}
 }
 
-#if defined(sun)
+#ifdef illumos
 static void
 dtrace_state_clean(dtrace_state_t *state)
 {
@@ -14087,7 +14087,7 @@ dtrace_state_deadman(dtrace_state_t *state)
 	dtrace_membar_producer();
 	state->dts_alive = now;
 }
-#else
+#else	/* !illumos */
 static void
 dtrace_state_clean(void *arg)
 {
@@ -14136,16 +14136,16 @@ dtrace_state_deadman(void *arg)
 	callout_reset(&state->dts_deadman, hz * dtrace_deadman_interval / NANOSEC,
 	    dtrace_state_deadman, state);
 }
-#endif
+#endif	/* illumos */
 
 static dtrace_state_t *
-#if defined(sun)
+#ifdef illumos
 dtrace_state_create(dev_t *devp, cred_t *cr)
 #else
 dtrace_state_create(struct cdev *dev)
 #endif
 {
-#if defined(sun)
+#ifdef illumos
 	minor_t minor;
 	major_t major;
 #else
@@ -14160,7 +14160,7 @@ dtrace_state_create(struct cdev *dev)
 	ASSERT(MUTEX_HELD(&dtrace_lock));
 	ASSERT(MUTEX_HELD(&cpu_lock));
 
-#if defined(sun)
+#ifdef illumos
 	minor = (minor_t)(uintptr_t)vmem_alloc(dtrace_minor, 1,
 	    VM_BESTFIT | VM_SLEEP);
 
@@ -14183,7 +14183,7 @@ dtrace_state_create(struct cdev *dev)
 	state->dts_epid = DTRACE_EPIDNONE + 1;
 
 	(void) snprintf(c, sizeof (c), "dtrace_aggid_%d", m);
-#if defined(sun)
+#ifdef illumos
 	state->dts_aggid_arena = vmem_create(c, (void *)1, UINT32_MAX, 1,
 	    NULL, NULL, NULL, 0, VM_SLEEP | VMC_IDENTIFIER);
 
@@ -14211,7 +14211,7 @@ dtrace_state_create(struct cdev *dev)
 	state->dts_buffer = kmem_zalloc(bufsize, KM_SLEEP);
 	state->dts_aggbuffer = kmem_zalloc(bufsize, KM_SLEEP);
 
-#if defined(sun)
+#ifdef illumos
 	state->dts_cleaner = CYCLIC_NONE;
 	state->dts_deadman = CYCLIC_NONE;
 #else
@@ -14301,7 +14301,7 @@ dtrace_state_create(struct cdev *dev)
 			 * we can do destructive things to processes which
 			 * have altered credentials.
 			 */
-#if defined(sun)
+#ifdef illumos
 			if (priv_isequalset(priv_getset(cr, PRIV_EFFECTIVE),
 			    cr->cr_zone->zone_privset)) {
 				state->dts_cred.dcr_action |=
@@ -14343,7 +14343,7 @@ dtrace_state_create(struct cdev *dev)
 				state->dts_cred.dcr_action |=
 				    DTRACE_CRA_PROC_DESTRUCTIVE_ALLZONE;
 
-#if defined(sun)
+#ifdef illumos
 			/*
 			 * If we have all privs in whatever zone this is,
 			 * we can do destructive things to processes which
@@ -14502,7 +14502,7 @@ dtrace_state_go(dtrace_state_t *state, processorid_t *cpu)
 	dtrace_optval_t *opt = state->dts_options, sz, nspec;
 	dtrace_speculation_t *spec;
 	dtrace_buffer_t *buf;
-#if defined(sun)
+#ifdef illumos
 	cyc_handler_t hdlr;
 	cyc_time_t when;
 #endif
@@ -14686,7 +14686,7 @@ dtrace_state_go(dtrace_state_t *state, processorid_t *cpu)
 		opt[DTRACEOPT_CLEANRATE] = dtrace_cleanrate_max;
 
 	state->dts_alive = state->dts_laststatus = dtrace_gethrtime();
-#if defined(sun)
+#ifdef illumos
 	hdlr.cyh_func = (cyc_func_t)dtrace_state_clean;
 	hdlr.cyh_arg = state;
 	hdlr.cyh_level = CY_LOW_LEVEL;
@@ -14713,7 +14713,7 @@ dtrace_state_go(dtrace_state_t *state, processorid_t *cpu)
 
 	state->dts_activity = DTRACE_ACTIVITY_WARMUP;
 
-#if defined(sun)
+#ifdef illumos
 	if (state->dts_getf != 0 &&
 	    !(state->dts_cred.dcr_visible & DTRACE_CRV_KERNEL)) {
 		/*
@@ -14847,7 +14847,7 @@ dtrace_state_stop(dtrace_state_t *state, processorid_t *cpu)
 	state->dts_activity = DTRACE_ACTIVITY_STOPPED;
 	dtrace_sync();
 
-#if defined(sun)
+#ifdef illumos
 	if (state->dts_getf != 0 &&
 	    !(state->dts_cred.dcr_visible & DTRACE_CRV_KERNEL)) {
 		/*
@@ -14930,7 +14930,7 @@ dtrace_state_destroy(dtrace_state_t *state)
 {
 	dtrace_ecb_t *ecb;
 	dtrace_vstate_t *vstate = &state->dts_vstate;
-#if defined(sun)
+#ifdef illumos
 	minor_t minor = getminor(state->dts_dev);
 #endif
 	int i, bufsize = NCPU * sizeof (dtrace_buffer_t);
@@ -15008,7 +15008,7 @@ dtrace_state_destroy(dtrace_state_t *state)
 	for (i = 0; i < nspec; i++)
 		dtrace_buffer_free(spec[i].dtsp_buffer);
 
-#if defined(sun)
+#ifdef illumos
 	if (state->dts_cleaner != CYCLIC_NONE)
 		cyclic_remove(state->dts_cleaner);
 
@@ -15048,14 +15048,14 @@ dtrace_state_destroy(dtrace_state_t *state)
 	dtrace_format_destroy(state);
 
 	if (state->dts_aggid_arena != NULL) {
-#if defined(sun)
+#ifdef illumos
 		vmem_destroy(state->dts_aggid_arena);
 #else
 		delete_unrhdr(state->dts_aggid_arena);
 #endif
 		state->dts_aggid_arena = NULL;
 	}
-#if defined(sun)
+#ifdef illumos
 	ddi_soft_state_free(dtrace_softstate, minor);
 	vmem_free(dtrace_minor, (void *)(uintptr_t)minor, 1);
 #endif
@@ -15107,7 +15107,7 @@ dtrace_anon_property(void)
 			break;
 		}
 
-#if defined(sun)
+#ifdef illumos
 		/*
 		 * We want to create anonymous state, so we need to transition
 		 * the kernel debugger to indicate that DTrace is active.  If
@@ -15126,7 +15126,7 @@ dtrace_anon_property(void)
 		 * If we haven't allocated an anonymous state, we'll do so now.
 		 */
 		if ((state = dtrace_anon.dta_state) == NULL) {
-#if defined(sun)
+#ifdef illumos
 			state = dtrace_state_create(NULL, NULL);
 #else
 			state = dtrace_state_create(NULL);
@@ -16015,7 +16015,7 @@ dtrace_helpers_create(proc_t *p)
 	return (help);
 }
 
-#if defined(sun)
+#ifdef illumos
 static
 #endif
 void
@@ -16023,7 +16023,7 @@ dtrace_helpers_destroy(proc_t *p)
 {
 	dtrace_helpers_t *help;
 	dtrace_vstate_t *vstate;
-#if defined(sun)
+#ifdef illumos
 	proc_t *p = curproc;
 #endif
 	int i;
@@ -16112,7 +16112,7 @@ dtrace_helpers_destroy(proc_t *p)
 	mutex_exit(&dtrace_lock);
 }
 
-#if defined(sun)
+#ifdef illumos
 static
 #endif
 void
@@ -16206,11 +16206,11 @@ dtrace_module_loaded(modctl_t *ctl)
 	dtrace_provider_t *prv;
 
 	mutex_enter(&dtrace_provider_lock);
-#if defined(sun)
+#ifdef illumos
 	mutex_enter(&mod_lock);
 #endif
 
-#if defined(sun)
+#ifdef illumos
 	ASSERT(ctl->mod_busy);
 #endif
 
@@ -16221,7 +16221,7 @@ dtrace_module_loaded(modctl_t *ctl)
 	for (prv = dtrace_provider; prv != NULL; prv = prv->dtpv_next)
 		prv->dtpv_pops.dtps_provide_module(prv->dtpv_arg, ctl);
 
-#if defined(sun)
+#ifdef illumos
 	mutex_exit(&mod_lock);
 #endif
 	mutex_exit(&dtrace_provider_lock);
@@ -16260,7 +16260,7 @@ dtrace_module_loaded(modctl_t *ctl)
 }
 
 static void
-#if defined(sun)
+#ifdef illumos
 dtrace_module_unloaded(modctl_t *ctl)
 #else
 dtrace_module_unloaded(modctl_t *ctl, int *error)
@@ -16268,12 +16268,12 @@ dtrace_module_unloaded(modctl_t *ctl, int *error)
 {
 	dtrace_probe_t template, *probe, *first, *next;
 	dtrace_provider_t *prov;
-#if !defined(sun)
+#ifndef illumos
 	char modname[DTRACE_MODNAMELEN];
 	size_t len;
 #endif
 
-#if defined(sun)
+#ifdef illumos
 	template.dtpr_mod = ctl->mod_modname;
 #else
 	/* Handle the fact that ctl->filename may end in ".ko". */
@@ -16285,12 +16285,12 @@ dtrace_module_unloaded(modctl_t *ctl, int *error)
 #endif
 
 	mutex_enter(&dtrace_provider_lock);
-#if defined(sun)
+#ifdef illumos
 	mutex_enter(&mod_lock);
 #endif
 	mutex_enter(&dtrace_lock);
 
-#if !defined(sun)
+#ifndef illumos
 	if (ctl->nenabled > 0) {
 		/* Don't allow unloads if a probe is enabled. */
 		mutex_exit(&dtrace_provider_lock);
@@ -16308,7 +16308,7 @@ dtrace_module_unloaded(modctl_t *ctl, int *error)
 		 * we don't have any work to do.
 		 */
 		mutex_exit(&dtrace_provider_lock);
-#if defined(sun)
+#ifdef illumos
 		mutex_exit(&mod_lock);
 #endif
 		mutex_exit(&dtrace_lock);
@@ -16319,7 +16319,7 @@ dtrace_module_unloaded(modctl_t *ctl, int *error)
 	    probe != NULL; probe = probe->dtpr_nextmod) {
 		if (probe->dtpr_ecb != NULL) {
 			mutex_exit(&dtrace_provider_lock);
-#if defined(sun)
+#ifdef illumos
 			mutex_exit(&mod_lock);
 #endif
 			mutex_exit(&dtrace_lock);
@@ -16335,7 +16335,7 @@ dtrace_module_unloaded(modctl_t *ctl, int *error)
 			 * probe, either.
 			 */
 			if (dtrace_err_verbose) {
-#if defined(sun)
+#ifdef illumos
 				cmn_err(CE_WARN, "unloaded module '%s' had "
 				    "enabled probes", ctl->mod_modname);
 #else
@@ -16384,7 +16384,7 @@ dtrace_module_unloaded(modctl_t *ctl, int *error)
 		kmem_free(probe->dtpr_mod, strlen(probe->dtpr_mod) + 1);
 		kmem_free(probe->dtpr_func, strlen(probe->dtpr_func) + 1);
 		kmem_free(probe->dtpr_name, strlen(probe->dtpr_name) + 1);
-#if defined(sun)
+#ifdef illumos
 		vmem_free(dtrace_arena, (void *)(uintptr_t)probe->dtpr_id, 1);
 #else
 		free_unr(dtrace_arena, probe->dtpr_id);
@@ -16393,13 +16393,13 @@ dtrace_module_unloaded(modctl_t *ctl, int *error)
 	}
 
 	mutex_exit(&dtrace_lock);
-#if defined(sun)
+#ifdef illumos
 	mutex_exit(&mod_lock);
 #endif
 	mutex_exit(&dtrace_provider_lock);
 }
 
-#if !defined(sun)
+#ifndef illumos
 static void
 dtrace_kld_load(void *arg __unused, linker_file_t lf)
 {
@@ -16418,7 +16418,7 @@ dtrace_kld_unload_try(void *arg __unused, linker_file_t lf, int *error)
 }
 #endif
 
-#if defined(sun)
+#ifdef illumos
 static void
 dtrace_suspend(void)
 {
@@ -16491,7 +16491,7 @@ dtrace_cpu_setup(cpu_setup_t what, processorid_t cpu)
 	return (0);
 }
 
-#if defined(sun)
+#ifdef illumos
 static void
 dtrace_cpu_setup_initial(processorid_t cpu)
 {
@@ -16539,7 +16539,7 @@ dtrace_toxrange_add(uintptr_t base, uintptr_t limit)
 static void
 dtrace_getf_barrier()
 {
-#if defined(sun)
+#ifdef illumos
 	/*
 	 * When we have unprivileged (that is, non-DTRACE_CRV_KERNEL) enablings
 	 * that contain calls to getf(), this routine will be called on every
@@ -16558,7 +16558,7 @@ dtrace_getf_barrier()
 /*
  * DTrace Driver Cookbook Functions
  */
-#if defined(sun)
+#ifdef illumos
 /*ARGSUSED*/
 static int
 dtrace_attach(dev_info_t *devi, ddi_attach_cmd_t cmd)
@@ -16725,15 +16725,15 @@ dtrace_attach(dev_info_t *devi, ddi_attach_cmd_t cmd)
 
 	return (DDI_SUCCESS);
 }
-#endif
+#endif	/* illumos */
 
-#if !defined(sun)
+#ifndef illumos
 static void dtrace_dtr(void *);
 #endif
 
 /*ARGSUSED*/
 static int
-#if defined(sun)
+#ifdef illumos
 dtrace_open(dev_t *devp, int flag, int otyp, cred_t *cred_p)
 #else
 dtrace_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
@@ -16744,7 +16744,7 @@ dtrace_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
 	uid_t uid;
 	zoneid_t zoneid;
 
-#if defined(sun)
+#ifdef illumos
 	if (getminor(*devp) == DTRACEMNRN_HELPER)
 		return (0);
 
@@ -16781,7 +16781,7 @@ dtrace_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
 	dtrace_opens++;
 	dtrace_membar_producer();
 
-#if defined(sun)
+#ifdef illumos
 	/*
 	 * If the kernel debugger is active (that is, if the kernel debugger
 	 * modified text in some way), we won't allow the open.
@@ -16802,7 +16802,7 @@ dtrace_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
 	mutex_exit(&cpu_lock);
 
 	if (state == NULL) {
-#if defined(sun)
+#ifdef illumos
 		if (--dtrace_opens == 0 && dtrace_anon.dta_enabling == NULL)
 			(void) kdi_dtrace_set(KDI_DTSET_DTRACE_DEACTIVATE);
 #else
@@ -16818,7 +16818,7 @@ dtrace_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
 }
 
 /*ARGSUSED*/
-#if defined(sun)
+#ifdef illumos
 static int
 dtrace_close(dev_t dev, int flag, int otyp, cred_t *cred_p)
 #else
@@ -16826,7 +16826,7 @@ static void
 dtrace_dtr(void *data)
 #endif
 {
-#if defined(sun)
+#ifdef illumos
 	minor_t minor = getminor(dev);
 	dtrace_state_t *state;
 
@@ -16852,13 +16852,13 @@ dtrace_dtr(void *data)
 
 		dtrace_state_destroy(state);
 
-#if !defined(sun)
+#ifndef illumos
 		kmem_free(state, 0);
 #endif
 	}
 
 	ASSERT(dtrace_opens > 0);
-#if defined(sun)
+#ifdef illumos
 	/*
 	 * Only relinquish control of the kernel debugger interface when there
 	 * are no consumers and no anonymous enablings.
@@ -16872,12 +16872,12 @@ dtrace_dtr(void *data)
 	mutex_exit(&dtrace_lock);
 	mutex_exit(&cpu_lock);
 
-#if defined(sun)
+#ifdef illumos
 	return (0);
 #endif
 }
 
-#if defined(sun)
+#ifdef illumos
 /*ARGSUSED*/
 static int
 dtrace_ioctl_helper(int cmd, intptr_t arg, int *rv)
@@ -17821,7 +17821,7 @@ dtrace_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
 }
 #endif
 
-#if defined(sun)
+#ifdef illumos
 /*ARGSUSED*/
 static int
 dtrace_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
@@ -17844,7 +17844,7 @@ dtrace_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
 }
 #endif
 
-#if defined(sun)
+#ifdef illumos
 static struct cb_ops dtrace_cb_ops = {
 	dtrace_open,		/* open */
 	dtrace_close,		/* close */
diff --git a/sys/cddl/contrib/opensolaris/uts/common/dtrace/fasttrap.c b/sys/cddl/contrib/opensolaris/uts/common/dtrace/fasttrap.c
index f39b6ad118af..be2b27db4623 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/dtrace/fasttrap.c
+++ b/sys/cddl/contrib/opensolaris/uts/common/dtrace/fasttrap.c
@@ -38,13 +38,13 @@
 #include <sys/modctl.h>
 #include <sys/conf.h>
 #include <sys/systm.h>
-#if defined(sun)
+#ifdef illumos
 #include <sys/ddi.h>
 #endif
 #include <sys/sunddi.h>
 #include <sys/cpuvar.h>
 #include <sys/kmem.h>
-#if defined(sun)
+#ifdef illumos
 #include <sys/strsubr.h>
 #endif
 #include <sys/fasttrap.h>
@@ -55,12 +55,12 @@
 #include <sys/sysmacros.h>
 #include <sys/proc.h>
 #include <sys/policy.h>
-#if defined(sun)
+#ifdef illumos
 #include <util/qsort.h>
 #endif
 #include <sys/mutex.h>
 #include <sys/kernel.h>
-#if !defined(sun)
+#ifndef illumos
 #include <sys/dtrace_bsd.h>
 #include <sys/eventhandler.h>
 #include <sys/u8_textprep.h>
@@ -212,7 +212,7 @@ static void fasttrap_provider_free(fasttrap_provider_t *);
 static fasttrap_proc_t *fasttrap_proc_lookup(pid_t);
 static void fasttrap_proc_release(fasttrap_proc_t *);
 
-#if !defined(sun)
+#ifndef illumos
 static void fasttrap_thread_dtor(void *, struct thread *);
 #endif
 
@@ -221,7 +221,7 @@ static void fasttrap_thread_dtor(void *, struct thread *);
 
 #define	FASTTRAP_PROCS_INDEX(pid) ((pid) & fasttrap_procs.fth_mask)
 
-#if !defined(sun)
+#ifndef illumos
 static kmutex_t fasttrap_cpuc_pid_lock[MAXCPU];
 static eventhandler_tag fasttrap_thread_dtor_tag;
 #endif
@@ -274,7 +274,7 @@ fasttrap_hash_str(const char *p)
 void
 fasttrap_sigtrap(proc_t *p, kthread_t *t, uintptr_t pc)
 {
-#if defined(sun)
+#ifdef illumos
 	sigqueue_t *sqp = kmem_zalloc(sizeof (sigqueue_t), KM_SLEEP);
 
 	sqp->sq_info.si_signo = SIGTRAP;
@@ -300,7 +300,7 @@ fasttrap_sigtrap(proc_t *p, kthread_t *t, uintptr_t pc)
 #endif
 }
 
-#if !defined(sun)
+#ifndef illumos
 /*
  * Obtain a chunk of scratch space in the address space of the target process.
  */
@@ -572,20 +572,20 @@ fasttrap_pid_cleanup(void)
 static void
 fasttrap_fork(proc_t *p, proc_t *cp)
 {
-#if !defined(sun)
+#ifndef illumos
 	fasttrap_scrblock_t *scrblk;
 	fasttrap_proc_t *fprc = NULL;
 #endif
 	pid_t ppid = p->p_pid;
 	int i;
 
-#if defined(sun)
+#ifdef illumos
 	ASSERT(curproc == p);
 	ASSERT(p->p_proc_flag & P_PR_LOCK);
 #else
 	PROC_LOCK_ASSERT(p, MA_OWNED);
 #endif
-#if defined(sun)
+#ifdef illumos
 	ASSERT(p->p_dtrace_count > 0);
 #else
 	if (p->p_dtrace_helpers) {
@@ -624,7 +624,7 @@ fasttrap_fork(proc_t *p, proc_t *cp)
 	 * We don't have to worry about the child process disappearing
 	 * because we're in fork().
 	 */
-#if defined(sun)
+#ifdef illumos
 	mtx_lock_spin(&cp->p_slock);
 	sprlock_proc(cp);
 	mtx_unlock_spin(&cp->p_slock);
@@ -661,14 +661,14 @@ fasttrap_fork(proc_t *p, proc_t *cp)
 				 * mid-fork.
 				 */
 				ASSERT(tp->ftt_proc->ftpc_acount != 0);
-#if !defined(sun)
+#ifndef illumos
 				fprc = tp->ftt_proc;
 #endif
 			}
 		}
 		mutex_exit(&bucket->ftb_mtx);
 
-#if !defined(sun)
+#ifndef illumos
 		/*
 		 * Unmap any scratch space inherited from the parent's address
 		 * space.
@@ -685,7 +685,7 @@ fasttrap_fork(proc_t *p, proc_t *cp)
 #endif
 	}
 
-#if defined(sun)
+#ifdef illumos
 	mutex_enter(&cp->p_lock);
 	sprunlock(cp);
 #else
@@ -703,11 +703,11 @@ fasttrap_fork(proc_t *p, proc_t *cp)
 static void
 fasttrap_exec_exit(proc_t *p)
 {
-#if !defined(sun)
+#ifndef illumos
 	struct thread *td;
 #endif
 
-#if defined(sun)
+#ifdef illumos
 	ASSERT(p == curproc);
 #else
 	PROC_LOCK_ASSERT(p, MA_OWNED);
@@ -727,7 +727,7 @@ fasttrap_exec_exit(proc_t *p)
 	 * static probes are handled by the meta-provider remove entry point.
 	 */
 	fasttrap_provider_retire(p->p_pid, FASTTRAP_PID_NAME, 0);
-#if !defined(sun)
+#ifndef illumos
 	if (p->p_dtrace_helpers)
 		dtrace_helpers_destroy(p);
 	PROC_LOCK(p);
@@ -762,7 +762,7 @@ fasttrap_tracepoint_enable(proc_t *p, fasttrap_probe_t *probe, uint_t index)
 
 	ASSERT(probe->ftp_tps[index].fit_tp->ftt_pid == pid);
 
-#if defined(sun)
+#ifdef illumos
 	ASSERT(!(p->p_flag & SVFORK));
 #endif
 
@@ -870,7 +870,7 @@ again:
 		 * Increment the count of the number of tracepoints active in
 		 * the victim process.
 		 */
-#if defined(sun)
+#ifdef illumos
 		ASSERT(p->p_proc_flag & P_PR_LOCK);
 #endif
 		p->p_dtrace_count++;
@@ -1062,7 +1062,7 @@ fasttrap_tracepoint_disable(proc_t *p, fasttrap_probe_t *probe, uint_t index)
 		 * Decrement the count of the number of tracepoints active
 		 * in the victim process.
 		 */
-#if defined(sun)
+#ifdef illumos
 		ASSERT(p->p_proc_flag & P_PR_LOCK);
 #endif
 		p->p_dtrace_count--;
@@ -1115,7 +1115,7 @@ fasttrap_enable_callbacks(void)
 static void
 fasttrap_disable_callbacks(void)
 {
-#if defined(sun)
+#ifdef illumos
 	ASSERT(MUTEX_HELD(&cpu_lock));
 #endif
 
@@ -1124,7 +1124,7 @@ fasttrap_disable_callbacks(void)
 	ASSERT(fasttrap_pid_count > 0);
 	fasttrap_pid_count--;
 	if (fasttrap_pid_count == 0) {
-#if defined(sun)
+#ifdef illumos
 		cpu_t *cur, *cpu = CPU;
 
 		for (cur = cpu->cpu_next_onln; cur != cpu;
@@ -1134,7 +1134,7 @@ fasttrap_disable_callbacks(void)
 #endif
 		dtrace_pid_probe_ptr = NULL;
 		dtrace_return_probe_ptr = NULL;
-#if defined(sun)
+#ifdef illumos
 		for (cur = cpu->cpu_next_onln; cur != cpu;
 		    cur = cur->cpu_next_onln) {
 			rw_exit(&cur->cpu_ft_lock);
@@ -1155,7 +1155,7 @@ fasttrap_pid_enable(void *arg, dtrace_id_t id, void *parg)
 	ASSERT(probe != NULL);
 	ASSERT(!probe->ftp_enabled);
 	ASSERT(id == probe->ftp_id);
-#if defined(sun)
+#ifdef illumos
 	ASSERT(MUTEX_HELD(&cpu_lock));
 #endif
 
@@ -1182,7 +1182,7 @@ fasttrap_pid_enable(void *arg, dtrace_id_t id, void *parg)
 	 * a fork in which the traced process is being born and we're copying
 	 * USDT probes. Otherwise, the process is gone so bail.
 	 */
-#if defined(sun)
+#ifdef illumos
 	if ((p = sprlock(probe->ftp_pid)) == NULL) {
 		if ((curproc->p_flag & SFORKING) == 0)
 			return;
@@ -1250,7 +1250,7 @@ fasttrap_pid_enable(void *arg, dtrace_id_t id, void *parg)
 				i--;
 			}
 
-#if defined(sun)
+#ifdef illumos
 			mutex_enter(&p->p_lock);
 			sprunlock(p);
 #else
@@ -1265,7 +1265,7 @@ fasttrap_pid_enable(void *arg, dtrace_id_t id, void *parg)
 			return;
 		}
 	}
-#if defined(sun)
+#ifdef illumos
 	mutex_enter(&p->p_lock);
 	sprunlock(p);
 #else
@@ -1344,7 +1344,7 @@ fasttrap_pid_disable(void *arg, dtrace_id_t id, void *parg)
 
 	probe->ftp_enabled = 0;
 
-#if defined(sun)
+#ifdef illumos
 	ASSERT(MUTEX_HELD(&cpu_lock));
 #endif
 	fasttrap_disable_callbacks();
@@ -1485,7 +1485,7 @@ fasttrap_proc_lookup(pid_t pid)
 	new_fprc->ftpc_pid = pid;
 	new_fprc->ftpc_rcount = 1;
 	new_fprc->ftpc_acount = 1;
-#if !defined(sun)
+#ifndef illumos
 	mutex_init(&new_fprc->ftpc_mtx, "fasttrap proc mtx", MUTEX_DEFAULT,
 	    NULL);
 #endif
@@ -1525,7 +1525,7 @@ fasttrap_proc_release(fasttrap_proc_t *proc)
 	fasttrap_bucket_t *bucket;
 	fasttrap_proc_t *fprc, **fprcp;
 	pid_t pid = proc->ftpc_pid;
-#if !defined(sun)
+#ifndef illumos
 	fasttrap_scrblock_t *scrblk, *scrblktmp;
 	fasttrap_scrspace_t *scrspc, *scrspctmp;
 	struct proc *p;
@@ -1542,7 +1542,7 @@ fasttrap_proc_release(fasttrap_proc_t *proc)
 		return;
 	}
 
-#if !defined(sun)
+#ifndef illumos
 	/*
 	 * Free all structures used to manage per-thread scratch space.
 	 */
@@ -1664,7 +1664,7 @@ fasttrap_provider_lookup(pid_t pid, const char *name,
 	new_fp = kmem_zalloc(sizeof (fasttrap_provider_t), KM_SLEEP);
 	new_fp->ftp_pid = pid;
 	new_fp->ftp_proc = fasttrap_proc_lookup(pid);
-#if !defined(sun)
+#ifndef illumos
 	mutex_init(&new_fp->ftp_mtx, "provider mtx", MUTEX_DEFAULT, NULL);
 	mutex_init(&new_fp->ftp_cmtx, "lock on creating", MUTEX_DEFAULT, NULL);
 #endif
@@ -1745,7 +1745,7 @@ fasttrap_provider_free(fasttrap_provider_t *provider)
 
 	fasttrap_proc_release(provider->ftp_proc);
 
-#if !defined(sun)
+#ifndef illumos
 	mutex_destroy(&provider->ftp_mtx);
 	mutex_destroy(&provider->ftp_cmtx);
 #endif
@@ -1763,7 +1763,7 @@ fasttrap_provider_free(fasttrap_provider_t *provider)
 	}
 
 	p->p_dtrace_probes--;
-#if !defined(sun)
+#ifndef illumos
 	PROC_UNLOCK(p);
 #endif
 }
@@ -2304,7 +2304,7 @@ fasttrap_ioctl(struct cdev *dev, u_long cmd, caddr_t arg, int fflag,
 			proc_t *p;
 			pid_t pid = probe->ftps_pid;
 
-#if defined(sun)
+#ifdef illumos
 			mutex_enter(&pidlock);
 #endif
 			/*
@@ -2317,12 +2317,12 @@ fasttrap_ioctl(struct cdev *dev, u_long cmd, caddr_t arg, int fflag,
 				fill_kinfo_proc(p, &kp);
 			sx_sunlock(&proctree_lock);
 			if (p == NULL || kp.ki_stat == SIDL) {
-#if defined(sun)
+#ifdef illumos
 				mutex_exit(&pidlock);
 #endif
 				return (ESRCH);
 			}
-#if defined(sun)
+#ifdef illumos
 			mutex_enter(&p->p_lock);
 			mutex_exit(&pidlock);
 #else
@@ -2332,7 +2332,7 @@ fasttrap_ioctl(struct cdev *dev, u_long cmd, caddr_t arg, int fflag,
 #ifdef notyet
 			if ((ret = priv_proc_cred_perm(cr, p, NULL,
 			    VREAD | VWRITE)) != 0) {
-#if defined(sun)
+#ifdef illumos
 				mutex_exit(&p->p_lock);
 #else
 				PROC_UNLOCK(p);
@@ -2340,7 +2340,7 @@ fasttrap_ioctl(struct cdev *dev, u_long cmd, caddr_t arg, int fflag,
 				return (ret);
 			}
 #endif /* notyet */
-#if defined(sun)
+#ifdef illumos
 			mutex_exit(&p->p_lock);
 #else
 			PROC_UNLOCK(p);
@@ -2358,11 +2358,11 @@ err:
 		fasttrap_instr_query_t instr;
 		fasttrap_tracepoint_t *tp;
 		uint_t index;
-#if defined(sun)
+#ifdef illumos
 		int ret;
 #endif
 
-#if defined(sun)
+#ifdef illumos
 		if (copyin((void *)arg, &instr, sizeof (instr)) != 0)
 			return (EFAULT);
 #endif
@@ -2372,7 +2372,7 @@ err:
 			proc_t *p;
 			pid_t pid = instr.ftiq_pid;
 
-#if defined(sun)
+#ifdef illumos
 			mutex_enter(&pidlock);
 #endif
 			/*
@@ -2385,12 +2385,12 @@ err:
 				fill_kinfo_proc(p, &kp);
 			sx_sunlock(&proctree_lock);
 			if (p == NULL || kp.ki_stat == SIDL) {
-#if defined(sun)
+#ifdef illumos
 				mutex_exit(&pidlock);
 #endif
 				return (ESRCH);
 			}
-#if defined(sun)
+#ifdef illumos
 			mutex_enter(&p->p_lock);
 			mutex_exit(&pidlock);
 #else
@@ -2400,7 +2400,7 @@ err:
 #ifdef notyet
 			if ((ret = priv_proc_cred_perm(cr, p, NULL,
 			    VREAD)) != 0) {
-#if defined(sun)
+#ifdef illumos
 				mutex_exit(&p->p_lock);
 #else
 				PROC_UNLOCK(p);
@@ -2409,7 +2409,7 @@ err:
 			}
 #endif /* notyet */
 
-#if defined(sun)
+#ifdef illumos
 			mutex_exit(&p->p_lock);
 #else
 			PROC_UNLOCK(p);
@@ -2462,7 +2462,7 @@ fasttrap_load(void)
 	mutex_init(&fasttrap_count_mtx, "fasttrap count mtx", MUTEX_DEFAULT,
 	    NULL);
 
-#if defined(sun)
+#ifdef illumos
 	fasttrap_max = ddi_getprop(DDI_DEV_T_ANY, devi, DDI_PROP_DONTPASS,
 	    "fasttrap-max-probes", FASTTRAP_MAX_DEFAULT);
 #else
@@ -2473,7 +2473,7 @@ fasttrap_load(void)
 	/*
 	 * Conjure up the tracepoints hashtable...
 	 */
-#if defined(sun)
+#ifdef illumos
 	nent = ddi_getprop(DDI_DEV_T_ANY, devi, DDI_PROP_DONTPASS,
 	    "fasttrap-hash-size", FASTTRAP_TPOINTS_DEFAULT_SIZE);
 #else
@@ -2491,7 +2491,7 @@ fasttrap_load(void)
 	fasttrap_tpoints.fth_mask = fasttrap_tpoints.fth_nent - 1;
 	fasttrap_tpoints.fth_table = kmem_zalloc(fasttrap_tpoints.fth_nent *
 	    sizeof (fasttrap_bucket_t), KM_SLEEP);
-#if !defined(sun)
+#ifndef illumos
 	for (i = 0; i < fasttrap_tpoints.fth_nent; i++)
 		mutex_init(&fasttrap_tpoints.fth_table[i].ftb_mtx,
 		    "tracepoints bucket mtx", MUTEX_DEFAULT, NULL);
@@ -2509,7 +2509,7 @@ fasttrap_load(void)
 	fasttrap_provs.fth_mask = fasttrap_provs.fth_nent - 1;
 	fasttrap_provs.fth_table = kmem_zalloc(fasttrap_provs.fth_nent *
 	    sizeof (fasttrap_bucket_t), KM_SLEEP);
-#if !defined(sun)
+#ifndef illumos
 	for (i = 0; i < fasttrap_provs.fth_nent; i++)
 		mutex_init(&fasttrap_provs.fth_table[i].ftb_mtx, 
 		    "providers bucket mtx", MUTEX_DEFAULT, NULL);
@@ -2519,7 +2519,7 @@ fasttrap_load(void)
 	    &fasttrap_cleanup_proc, 0, 0, "ftcleanup");
 	if (ret != 0) {
 		destroy_dev(fasttrap_cdev);
-#if !defined(sun)
+#ifndef illumos
 		for (i = 0; i < fasttrap_provs.fth_nent; i++)
 			mutex_destroy(&fasttrap_provs.fth_table[i].ftb_mtx);
 		for (i = 0; i < fasttrap_tpoints.fth_nent; i++)
@@ -2545,7 +2545,7 @@ fasttrap_load(void)
 	fasttrap_procs.fth_mask = fasttrap_procs.fth_nent - 1;
 	fasttrap_procs.fth_table = kmem_zalloc(fasttrap_procs.fth_nent *
 	    sizeof (fasttrap_bucket_t), KM_SLEEP);
-#if !defined(sun)
+#ifndef illumos
 	for (i = 0; i < fasttrap_procs.fth_nent; i++)
 		mutex_init(&fasttrap_procs.fth_table[i].ftb_mtx,
 		    "processes bucket mtx", MUTEX_DEFAULT, NULL);
@@ -2661,7 +2661,7 @@ fasttrap_unload(void)
 	mutex_exit(&fasttrap_count_mtx);
 #endif
 
-#if !defined(sun)
+#ifndef illumos
 	EVENTHANDLER_DEREGISTER(thread_dtor, fasttrap_thread_dtor_tag);
 
 	for (i = 0; i < fasttrap_tpoints.fth_nent; i++)
@@ -2683,7 +2683,7 @@ fasttrap_unload(void)
 	    fasttrap_procs.fth_nent * sizeof (fasttrap_bucket_t));
 	fasttrap_procs.fth_nent = 0;
 
-#if !defined(sun)
+#ifndef illumos
 	destroy_dev(fasttrap_cdev);
 	mutex_destroy(&fasttrap_count_mtx);
 	CPU_FOREACH(i) {
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/gfs.c b/sys/cddl/contrib/opensolaris/uts/common/fs/gfs.c
index 4bcdfc646fdf..2ff8df6ae894 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/gfs.c
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/gfs.c
@@ -107,7 +107,7 @@
  * 	gfs_root_create_file()
  */
 
-#ifdef sun
+#ifdef illumos
 /*
  * gfs_make_opsvec: take an array of vnode type definitions and create
  * their vnodeops_t structures
@@ -141,7 +141,7 @@ gfs_make_opsvec(gfs_opsvec_t *vec)
 	}
 	return (error);
 }
-#endif	/* sun */
+#endif	/* illumos */
 
 /*
  * Low level directory routines
@@ -347,7 +347,7 @@ gfs_readdir_emit(gfs_readdir_state_t *st, uio_t *uiop, offset_t voff,
 	    cookies));
 }
 
-#ifdef sun
+#ifdef illumos
 /*
  * gfs_readdir_emitn: like gfs_readdir_emit(), but takes an integer
  * instead of a string for the entry's name.
@@ -599,7 +599,7 @@ gfs_root_create(size_t size, vfs_t *vfsp, vnodeops_t *ops, ino64_t ino,
 	return (vp);
 }
 
-#ifdef sun
+#ifdef illumos
 /*
  * gfs_root_create_file(): create a root vnode for a GFS file as a filesystem
  *
@@ -619,7 +619,7 @@ gfs_root_create_file(size_t size, vfs_t *vfsp, vnodeops_t *ops, ino64_t ino)
 
 	return (vp);
 }
-#endif	/* sun */
+#endif	/* illumos */
 
 /*
  * gfs_file_inactive()
@@ -1146,7 +1146,7 @@ gfs_vop_readdir(ap)
 }
 
 
-#ifdef sun
+#ifdef illumos
 /*
  * gfs_vop_map: VOP_MAP() entry point
  *
@@ -1218,7 +1218,7 @@ gfs_vop_map(vnode_t *vp, offset_t off, struct as *as, caddr_t *addrp,
 
 	return (rv);
 }
-#endif	/* sun */
+#endif	/* illumos */
 
 /*
  * gfs_vop_reclaim: VOP_RECLAIM() entry point (solaris' VOP_INACTIVE())
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c
index 975ab7a7b381..29e9eca56706 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c
@@ -1207,7 +1207,7 @@ arc_cksum_compute(arc_buf_t *buf, boolean_t force)
 	mutex_exit(&buf->b_hdr->b_freeze_lock);
 #ifdef illumos
 	arc_buf_watch(buf);
-#endif /* illumos */
+#endif
 }
 
 #ifdef illumos
@@ -1282,7 +1282,7 @@ arc_buf_thaw(arc_buf_t *buf)
 
 #ifdef illumos
 	arc_buf_unwatch(buf);
-#endif /* illumos */
+#endif
 }
 
 void
@@ -1742,7 +1742,7 @@ arc_buf_destroy(arc_buf_t *buf, boolean_t recycle, boolean_t remove)
 		arc_cksum_verify(buf);
 #ifdef illumos
 		arc_buf_unwatch(buf);
-#endif /* illumos */
+#endif
 
 		if (!recycle) {
 			if (type == ARC_BUFC_METADATA) {
@@ -2595,7 +2595,7 @@ arc_reclaim_needed(void)
 		return (1);
 	}
 
-#ifdef sun
+#ifdef illumos
 	/*
 	 * take 'desfree' extra pages, so we reclaim sooner, rather than later
 	 */
@@ -2631,7 +2631,7 @@ arc_reclaim_needed(void)
 	if (availrmem <= pages_pp_maximum)
 		return (1);
 
-#endif	/* sun */
+#endif	/* illumos */
 #if defined(__i386) || !defined(UMA_MD_SMALL_ALLOC)
 	/*
 	 * If we're on an i386 platform, it's possible that we'll exhaust the
@@ -2652,7 +2652,7 @@ arc_reclaim_needed(void)
 		return (1);
 	}
 #endif
-#ifdef sun
+#ifdef illumos
 	/*
 	 * If zio data pages are being allocated out of a separate heap segment,
 	 * then enforce that the size of available vmem for this arena remains
@@ -2666,7 +2666,7 @@ arc_reclaim_needed(void)
 	    vmem_size(zio_arena, VMEM_FREE) <
 	    (vmem_size(zio_arena, VMEM_ALLOC) >> 4))
 		return (1);
-#endif	/* sun */
+#endif	/* illumos */
 #else	/* _KERNEL */
 	if (spa_get_random(100) == 0)
 		return (1);
@@ -2725,7 +2725,7 @@ arc_kmem_reap_now(arc_reclaim_strategy_t strat)
 	kmem_cache_reap_now(hdr_cache);
 	kmem_cache_reap_now(range_seg_cache);
 
-#ifdef sun
+#ifdef illumos
 	/*
 	 * Ask the vmem arena to reclaim unused memory from its
 	 * quantum caches.
@@ -3213,7 +3213,7 @@ arc_read_done(zio_t *zio)
 	arc_cksum_compute(buf, B_FALSE);
 #ifdef illumos
 	arc_buf_watch(buf);
-#endif /* illumos */
+#endif
 
 	if (hash_lock && zio->io_error == 0 && hdr->b_state == arc_anon) {
 		/*
@@ -3816,7 +3816,7 @@ arc_release(arc_buf_t *buf, void *tag)
 		arc_cksum_verify(buf);
 #ifdef illumos
 		arc_buf_unwatch(buf);
-#endif /* illumos */
+#endif
 
 		mutex_exit(hash_lock);
 
@@ -4186,7 +4186,7 @@ arc_init(void)
 	/* Start out with 1/8 of all memory */
 	arc_c = kmem_size() / 8;
 
-#ifdef sun
+#ifdef illumos
 #ifdef _KERNEL
 	/*
 	 * On architectures where the physical memory can be larger
@@ -4195,7 +4195,7 @@ arc_init(void)
 	 */
 	arc_c = MIN(arc_c, vmem_size(heap_arena, VMEM_ALLOC | VMEM_FREE) / 8);
 #endif
-#endif	/* sun */
+#endif	/* illumos */
 	/* set min cache to 1/32 of all memory, or 16MB, whichever is more */
 	arc_c_min = MAX(arc_c / 4, 64<<18);
 	/* set max to 1/2 of all memory, or all but 1GB, whichever is more */
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu.c
index c86d3a7371e3..181a65b62851 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu.c
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu.c
@@ -1238,7 +1238,7 @@ dmu_write_uio(objset_t *os, uint64_t object, uio_t *uio, uint64_t size,
 	return (err);
 }
 
-#ifdef sun
+#ifdef illumos
 int
 dmu_write_pages(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
     page_t *pp, dmu_tx_t *tx)
@@ -1294,7 +1294,7 @@ dmu_write_pages(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
 	return (err);
 }
 
-#else
+#else	/* !illumos */
 
 int
 dmu_write_pages(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
@@ -1351,8 +1351,8 @@ dmu_write_pages(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
 	dmu_buf_rele_array(dbp, numbufs, FTAG);
 	return (err);
 }
-#endif	/* sun */
-#endif
+#endif	/* illumos */
+#endif	/* _KERNEL */
 
 /*
  * Allocate a loaned anonymous arc buffer.
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode.c
index 665165a4f6c3..938b5d61793b 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode.c
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode.c
@@ -57,7 +57,7 @@ static dnode_phys_t dnode_phys_zero;
 int zfs_default_bs = SPA_MINBLOCKSHIFT;
 int zfs_default_ibs = DN_MAX_INDBLKSHIFT;
 
-#ifdef sun
+#ifdef illumos
 static kmem_cbrc_t dnode_move(void *, void *, size_t, void *);
 #endif
 
@@ -813,7 +813,7 @@ dnode_move_impl(dnode_t *odn, dnode_t *ndn)
 	odn->dn_moved = (uint8_t)-1;
 }
 
-#ifdef sun
+#ifdef illumos
 #ifdef	_KERNEL
 /*ARGSUSED*/
 static kmem_cbrc_t
@@ -956,7 +956,7 @@ dnode_move(void *buf, void *newbuf, size_t size, void *arg)
 	return (KMEM_CBRC_YES);
 }
 #endif	/* _KERNEL */
-#endif	/* sun */
+#endif	/* illumos */
 
 void
 dnode_special_close(dnode_handle_t *dnh)
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c
index 7886fd9302d5..8700f4c35eba 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c
@@ -3770,7 +3770,7 @@ spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props,
 }
 
 #ifdef _KERNEL
-#if defined(sun)
+#ifdef illumos
 /*
  * Get the root pool information from the root disk, then import the root pool
  * during the system boot up time.
@@ -3971,7 +3971,7 @@ out:
 	return (error);
 }
 
-#else
+#else	/* !illumos */
 
 extern int vdev_geom_read_pool_label(const char *name, nvlist_t ***configs,
     uint64_t *count);
@@ -4162,8 +4162,8 @@ spa_import_rootpool(const char *name)
 	return (0);
 }
 
-#endif	/* sun */
-#endif
+#endif	/* illumos */
+#endif	/* _KERNEL */
 
 /*
  * Import a non-root pool into the system.
@@ -5331,13 +5331,13 @@ spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config,
 	spa_activate(newspa, spa_mode_global);
 	spa_async_suspend(newspa);
 
-#ifndef sun
+#ifndef illumos
 	/* mark that we are creating new spa by splitting */
 	newspa->spa_splitting_newspa = B_TRUE;
 #endif
 	/* create the new pool from the disks of the original pool */
 	error = spa_load(newspa, SPA_LOAD_IMPORT, SPA_IMPORT_ASSEMBLE, B_TRUE);
-#ifndef sun
+#ifndef illumos
 	newspa->spa_splitting_newspa = B_FALSE;
 #endif
 	if (error)
@@ -6578,12 +6578,12 @@ spa_sync(spa_t *spa, uint64_t txg)
 #ifdef illumos
 	VERIFY(cyclic_reprogram(spa->spa_deadman_cycid,
 	    spa->spa_sync_starttime + spa->spa_deadman_synctime));
-#else	/* FreeBSD */
+#else	/* !illumos */
 #ifdef _KERNEL
 	callout_reset(&spa->spa_deadman_cycid,
 	    hz * spa->spa_deadman_synctime / NANOSEC, spa_deadman, spa);
 #endif
-#endif
+#endif	/* illumos */
 
 	/*
 	 * If we are upgrading to SPA_VERSION_RAIDZ_DEFLATE this txg,
@@ -6728,11 +6728,11 @@ spa_sync(spa_t *spa, uint64_t txg)
 
 #ifdef illumos
 	VERIFY(cyclic_reprogram(spa->spa_deadman_cycid, CY_INFINITY));
-#else	/* FreeBSD */
+#else	/* !illumos */
 #ifdef _KERNEL
 	callout_drain(&spa->spa_deadman_cycid);
 #endif
-#endif
+#endif	/* illumos */
 
 	/*
 	 * Clear the dirty config list.
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/dmu.h b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/dmu.h
index 3881d247b6d9..39ccf65236f2 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/dmu.h
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/dmu.h
@@ -616,7 +616,7 @@ int dmu_write_uio(objset_t *os, uint64_t object, struct uio *uio, uint64_t size,
 int dmu_write_uio_dbuf(dmu_buf_t *zdb, struct uio *uio, uint64_t size,
     dmu_tx_t *tx);
 #ifdef _KERNEL
-#ifdef sun
+#ifdef illumos
 int dmu_write_pages(objset_t *os, uint64_t object, uint64_t offset,
     uint64_t size, struct page *pp, dmu_tx_t *tx);
 #else
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/spa.h b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/spa.h
index cb5e01158d56..b3937e00ae41 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/spa.h
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/spa.h
@@ -601,7 +601,7 @@ extern int spa_get_stats(const char *pool, nvlist_t **config, char *altroot,
     size_t buflen);
 extern int spa_create(const char *pool, nvlist_t *config, nvlist_t *props,
     nvlist_t *zplprops);
-#if defined(sun)
+#ifdef illumos
 extern int spa_import_rootpool(char *devpath, char *devid);
 #else
 extern int spa_import_rootpool(const char *name);
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/spa_impl.h b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/spa_impl.h
index 40f5b06f1e3d..d1737e13cfda 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/spa_impl.h
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/spa_impl.h
@@ -245,7 +245,7 @@ struct spa {
 	uint64_t	spa_feat_refcount_cache[SPA_FEATURES];
 #ifdef illumos
 	cyclic_id_t	spa_deadman_cycid;	/* cyclic id */
-#else	/* FreeBSD */
+#else	/* !illumos */
 #ifdef _KERNEL
 	struct callout	spa_deadman_cycid;	/* callout id */
 #endif
@@ -275,7 +275,7 @@ struct spa {
 	 */
 	spa_config_lock_t spa_config_lock[SCL_LOCKS]; /* config changes */
 	refcount_t	spa_refcount;		/* number of opens */
-#ifndef sun
+#ifndef illumos
 	boolean_t	spa_splitting_newspa;	/* creating new spa in split */
 #endif
 };
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zvol.h b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zvol.h
index 75c6b3757c1d..7556eda0fbe9 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zvol.h
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zvol.h
@@ -45,7 +45,7 @@ extern int zvol_remove_minor(const char *);
 extern void zvol_remove_minors(const char *);
 extern int zvol_set_volsize(const char *, uint64_t);
 
-#ifdef sun
+#ifdef illumos
 extern int zvol_open(dev_t *devp, int flag, int otyp, cred_t *cr);
 extern int zvol_dump(dev_t dev, caddr_t addr, daddr_t offset, int nblocks);
 extern int zvol_close(dev_t dev, int flag, int otyp, cred_t *cr);
@@ -54,14 +54,14 @@ extern int zvol_read(dev_t dev, uio_t *uiop, cred_t *cr);
 extern int zvol_write(dev_t dev, uio_t *uiop, cred_t *cr);
 extern int zvol_aread(dev_t dev, struct aio_req *aio, cred_t *cr);
 extern int zvol_awrite(dev_t dev, struct aio_req *aio, cred_t *cr);
-#endif	/* sun */
+#endif	/* illumos */
 extern int zvol_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr,
     int *rvalp);
 extern int zvol_busy(void);
 extern void zvol_init(void);
 extern void zvol_fini(void);
 
-#ifdef sun
+#ifdef illumos
 extern int zvol_get_volume_params(minor_t minor, uint64_t *blksize,
     uint64_t *max_xfer_len, void **minor_hdl, void **objset_hdl, void **zil_hdl,
     void **rl_hdl, void **bonus_hdl);
@@ -69,7 +69,7 @@ extern uint64_t zvol_get_volume_size(void *minor_hdl);
 extern int zvol_get_volume_wce(void *minor_hdl);
 extern void zvol_log_write_minor(void *minor_hdl, dmu_tx_t *tx, offset_t off,
     ssize_t resid, boolean_t sync);
-#endif	/* sun */
+#endif	/* illumos */
 
 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 extern int zvol_create_minors(const char *name);
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c
index dfbb92eb81dd..a3ec38e16f78 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c
@@ -3360,7 +3360,7 @@ vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state, vdev_aux_t aux)
 boolean_t
 vdev_is_bootable(vdev_t *vd)
 {
-#ifdef sun
+#ifdef illumos
 	if (!vd->vdev_ops->vdev_op_leaf) {
 		char *vdev_type = vd->vdev_ops->vdev_op_type;
 
@@ -3379,7 +3379,7 @@ vdev_is_bootable(vdev_t *vd)
 		if (!vdev_is_bootable(vd->vdev_child[c]))
 			return (B_FALSE);
 	}
-#endif	/* sun */
+#endif	/* illumos */
 	return (B_TRUE);
 }
 
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_acl.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_acl.c
index 6545dc2ff845..fd6f9662cf93 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_acl.c
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_acl.c
@@ -2053,7 +2053,7 @@ zfs_zaccess_dataset_check(znode_t *zp, uint32_t v4_mode)
 		return (SET_ERROR(EPERM));
 	}
 
-#ifdef sun
+#ifdef illumos
 	if ((v4_mode & (ACE_DELETE | ACE_DELETE_CHILD)) &&
 	    (zp->z_pflags & ZFS_NOUNLINK)) {
 		return (SET_ERROR(EPERM));
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ctldir.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ctldir.c
index 01fae24d699e..9e0b8a0998c3 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ctldir.c
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ctldir.c
@@ -112,7 +112,7 @@ snapentry_compare(const void *a, const void *b)
 		return (0);
 }
 
-#ifdef sun
+#ifdef illumos
 vnodeops_t *zfsctl_ops_root;
 vnodeops_t *zfsctl_ops_snapdir;
 vnodeops_t *zfsctl_ops_snapshot;
@@ -123,20 +123,20 @@ static const fs_operation_def_t zfsctl_tops_root[];
 static const fs_operation_def_t zfsctl_tops_snapdir[];
 static const fs_operation_def_t zfsctl_tops_snapshot[];
 static const fs_operation_def_t zfsctl_tops_shares[];
-#else	/* !sun */
+#else
 static struct vop_vector zfsctl_ops_root;
 static struct vop_vector zfsctl_ops_snapdir;
 static struct vop_vector zfsctl_ops_snapshot;
 static struct vop_vector zfsctl_ops_shares;
 static struct vop_vector zfsctl_ops_shares_dir;
-#endif	/* !sun */
+#endif
 
 static vnode_t *zfsctl_mknode_snapdir(vnode_t *);
 static vnode_t *zfsctl_mknode_shares(vnode_t *);
 static vnode_t *zfsctl_snapshot_mknode(vnode_t *, uint64_t objset);
 static int zfsctl_unmount_snap(zfs_snapentry_t *, int, cred_t *);
 
-#ifdef sun
+#ifdef illumos
 static gfs_opsvec_t zfsctl_opsvec[] = {
 	{ ".zfs", zfsctl_tops_root, &zfsctl_ops_root },
 	{ ".zfs/snapshot", zfsctl_tops_snapdir, &zfsctl_ops_snapdir },
@@ -145,7 +145,7 @@ static gfs_opsvec_t zfsctl_opsvec[] = {
 	{ ".zfs/shares/vnode", zfsctl_tops_shares, &zfsctl_ops_shares },
 	{ NULL }
 };
-#endif	/* sun */
+#endif
 
 /*
  * Root directory elements.  We only have two entries
@@ -170,7 +170,7 @@ static gfs_dirent_t zfsctl_root_entries[] = {
 void
 zfsctl_init(void)
 {
-#ifdef sun
+#ifdef illumos
 	VERIFY(gfs_make_opsvec(zfsctl_opsvec) == 0);
 #endif
 }
@@ -178,7 +178,7 @@ zfsctl_init(void)
 void
 zfsctl_fini(void)
 {
-#ifdef sun
+#ifdef illumos
 	/*
 	 * Remove vfsctl vnode ops
 	 */
@@ -198,7 +198,7 @@ zfsctl_fini(void)
 	zfsctl_ops_snapshot = NULL;
 	zfsctl_ops_shares = NULL;
 	zfsctl_ops_shares_dir = NULL;
-#endif	/* sun */
+#endif	/* illumos */
 }
 
 boolean_t
@@ -549,7 +549,7 @@ zfsctl_root_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, pathname_t *pnp,
 	return (err);
 }
 
-#ifdef sun
+#ifdef illumos
 static int
 zfsctl_pathconf(vnode_t *vp, int cmd, ulong_t *valp, cred_t *cr,
     caller_context_t *ct)
@@ -565,9 +565,9 @@ zfsctl_pathconf(vnode_t *vp, int cmd, ulong_t *valp, cred_t *cr,
 
 	return (fs_pathconf(vp, cmd, valp, cr, ct));
 }
-#endif	/* sun */
+#endif	/* illumos */
 
-#ifdef sun
+#ifdef illumos
 static const fs_operation_def_t zfsctl_tops_root[] = {
 	{ VOPNAME_OPEN,		{ .vop_open = zfsctl_common_open }	},
 	{ VOPNAME_CLOSE,	{ .vop_close = zfsctl_common_close }	},
@@ -582,7 +582,7 @@ static const fs_operation_def_t zfsctl_tops_root[] = {
 	{ VOPNAME_FID,		{ .vop_fid = zfsctl_common_fid	}	},
 	{ NULL }
 };
-#endif	/* sun */
+#endif	/* illumos */
 
 /*
  * Special case the handling of "..".
@@ -676,7 +676,7 @@ zfsctl_unmount_snap(zfs_snapentry_t *sep, int fflags, cred_t *cr)
 	if ((error = vn_vfswlock(svp)) != 0)
 		return (error);
 
-#ifdef sun
+#ifdef illumos
 	VN_HOLD(svp);
 	error = dounmount(vn_mountedvfs(svp), fflags, cr);
 	if (error) {
@@ -696,12 +696,12 @@ zfsctl_unmount_snap(zfs_snapentry_t *sep, int fflags, cred_t *cr)
 	kmem_free(sep, sizeof (zfs_snapentry_t));
 
 	return (0);
-#else	/* !sun */
+#else
 	return (dounmount(vn_mountedvfs(svp), fflags, curthread));
-#endif	/* !sun */
+#endif
 }
 
-#ifdef sun
+#ifdef illumos
 static void
 zfsctl_rename_snap(zfsctl_snapdir_t *sdp, zfs_snapentry_t *sep, const char *nm)
 {
@@ -754,9 +754,9 @@ zfsctl_rename_snap(zfsctl_snapdir_t *sdp, zfs_snapentry_t *sep, const char *nm)
 
 	vfs_unlock(vfsp);
 }
-#endif	/* sun */
+#endif	/* illumos */
 
-#ifdef sun
+#ifdef illumos
 /*ARGSUSED*/
 static int
 zfsctl_snapdir_rename(vnode_t *sdvp, char *snm, vnode_t *tdvp, char *tnm,
@@ -821,9 +821,9 @@ zfsctl_snapdir_rename(vnode_t *sdvp, char *snm, vnode_t *tdvp, char *tnm,
 
 	return (err);
 }
-#endif	/* sun */
+#endif	/* illumos */
 
-#ifdef sun
+#ifdef illumos
 /* ARGSUSED */
 static int
 zfsctl_snapdir_remove(vnode_t *dvp, char *name, vnode_t *cwd, cred_t *cr,
@@ -879,7 +879,7 @@ zfsctl_snapdir_remove(vnode_t *dvp, char *name, vnode_t *cwd, cred_t *cr,
 
 	return (err);
 }
-#endif	/* sun */
+#endif	/* illumos */
 
 /*
  * This creates a snapshot under '.zfs/snapshot'.
@@ -1067,7 +1067,7 @@ zfsctl_snapdir_lookup(ap)
 		}
 		ZFS_EXIT(zfsvfs);
 		return (err);
-#endif	/* !illumos */
+#endif	/* illumos */
 	}
 
 	sep = kmem_alloc(sizeof (zfs_snapentry_t), KM_SLEEP);
@@ -1374,7 +1374,7 @@ zfsctl_snapdir_inactive(ap)
 	return (0);
 }
 
-#ifdef sun
+#ifdef illumos
 static const fs_operation_def_t zfsctl_tops_snapdir[] = {
 	{ VOPNAME_OPEN,		{ .vop_open = zfsctl_common_open }	},
 	{ VOPNAME_CLOSE,	{ .vop_close = zfsctl_common_close }	},
@@ -1405,7 +1405,7 @@ static const fs_operation_def_t zfsctl_tops_shares[] = {
 	{ VOPNAME_FID,		{ .vop_fid = zfsctl_shares_fid } },
 	{ NULL }
 };
-#else	/* !sun */
+#else	/* !illumos */
 static struct vop_vector zfsctl_ops_snapdir = {
 	.vop_default =	&default_vnodeops,
 	.vop_open =	zfsctl_common_open,
@@ -1434,7 +1434,7 @@ static struct vop_vector zfsctl_ops_shares = {
 	.vop_reclaim =	gfs_vop_reclaim,
 	.vop_fid =	zfsctl_shares_fid,
 };
-#endif	/* !sun */
+#endif	/* illumos */
 
 /*
  * pvp is the GFS vnode '.zfs/snapshot'.
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_fuid.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_fuid.c
index 197e122d961e..e74799a70fe0 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_fuid.c
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_fuid.c
@@ -406,7 +406,7 @@ zfs_fuid_map_id(zfsvfs_t *zfsvfs, uint64_t fuid,
 	domain = zfs_fuid_find_by_idx(zfsvfs, index);
 	ASSERT(domain != NULL);
 
-#ifdef sun
+#ifdef illumos
 	if (type == ZFS_OWNER || type == ZFS_ACE_USER) {
 		(void) kidmap_getuidbysid(crgetzone(cr), domain,
 		    FUID_RID(fuid), &id);
@@ -414,9 +414,9 @@ zfs_fuid_map_id(zfsvfs_t *zfsvfs, uint64_t fuid,
 		(void) kidmap_getgidbysid(crgetzone(cr), domain,
 		    FUID_RID(fuid), &id);
 	}
-#else	/* !sun */
+#else
 	id = UID_NOBODY;
-#endif	/* !sun */
+#endif
 	return (id);
 }
 
@@ -703,13 +703,13 @@ zfs_fuid_info_free(zfs_fuid_info_t *fuidp)
 boolean_t
 zfs_groupmember(zfsvfs_t *zfsvfs, uint64_t id, cred_t *cr)
 {
-#ifdef sun
+#ifdef illumos
 	ksid_t		*ksid = crgetsid(cr, KSID_GROUP);
 	ksidlist_t	*ksidlist = crgetsidlist(cr);
-#endif	/* !sun */
+#endif
 	uid_t		gid;
 
-#ifdef sun
+#ifdef illumos
 	if (ksid && ksidlist) {
 		int 		i;
 		ksid_t		*ksid_groups;
@@ -741,7 +741,7 @@ zfs_groupmember(zfsvfs_t *zfsvfs, uint64_t id, cred_t *cr)
 			}
 		}
 	}
-#endif	/* !sun */
+#endif	/* illumos */
 
 	/*
 	 * Not found in ksidlist, check posix groups
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c
index 383b789e611d..8801aa5abee3 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c
@@ -4823,7 +4823,7 @@ zfs_ioc_userspace_upgrade(zfs_cmd_t *zc)
 	return (error);
 }
 
-#ifdef sun
+#ifdef illumos
 /*
  * We don't want to have a hard dependency
  * against some special symbols in sharefs
@@ -4841,10 +4841,10 @@ int zfs_smbshare_inited;
 ddi_modhandle_t nfs_mod;
 ddi_modhandle_t sharefs_mod;
 ddi_modhandle_t smbsrv_mod;
-#endif	/* sun */
+#endif	/* illumos */
 kmutex_t zfs_share_lock;
 
-#ifdef sun
+#ifdef illumos
 static int
 zfs_init_sharefs()
 {
@@ -4864,12 +4864,12 @@ zfs_init_sharefs()
 	}
 	return (0);
 }
-#endif	/* sun */
+#endif	/* illumos */
 
 static int
 zfs_ioc_share(zfs_cmd_t *zc)
 {
-#ifdef sun
+#ifdef illumos
 	int error;
 	int opcode;
 
@@ -4960,9 +4960,9 @@ zfs_ioc_share(zfs_cmd_t *zc)
 
 	return (error);
 
-#else	/* !sun */
+#else	/* !illumos */
 	return (ENOSYS);
-#endif	/* !sun */
+#endif	/* illumos */
 }
 
 ace_t full_access[] = {
@@ -5065,7 +5065,7 @@ zfs_ioc_diff(zfs_cmd_t *zc)
 	return (error);
 }
 
-#ifdef sun
+#ifdef illumos
 /*
  * Remove all ACL files in shares dir
  */
@@ -5087,12 +5087,12 @@ zfs_smb_acl_purge(znode_t *dzp)
 	zap_cursor_fini(&zc);
 	return (error);
 }
-#endif	/* sun */
+#endif	/* illumos */
 
 static int
 zfs_ioc_smb_acl(zfs_cmd_t *zc)
 {
-#ifdef sun
+#ifdef illumos
 	vnode_t *vp;
 	znode_t *dzp;
 	vnode_t *resourcevp = NULL;
@@ -5215,9 +5215,9 @@ zfs_ioc_smb_acl(zfs_cmd_t *zc)
 	ZFS_EXIT(zfsvfs);
 
 	return (error);
-#else	/* !sun */
+#else	/* !illumos */
 	return (EOPNOTSUPP);
-#endif	/* !sun */
+#endif	/* illumos */
 }
 
 /*
@@ -5908,7 +5908,7 @@ zfsdev_open(struct cdev *devp, int flag, int mode, struct thread *td)
 {
 	int error = 0;
 
-#ifdef sun
+#ifdef illumos
 	if (getminor(*devp) != 0)
 		return (zvol_open(devp, flag, otyp, cr));
 #endif
@@ -6245,7 +6245,7 @@ out:
 	return (error);
 }
 
-#ifdef sun
+#ifdef illumos
 static int
 zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
 {
@@ -6296,7 +6296,7 @@ zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
 
 	return (DDI_FAILURE);
 }
-#endif	/* sun */
+#endif	/* illumos */
 
 /*
  * OK, so this is a little weird.
@@ -6307,7 +6307,7 @@ zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
  * /dev/zfs has basically nothing to do except serve up ioctls,
  * so most of the standard driver entry points are in zvol.c.
  */
-#ifdef sun
+#ifdef illumos
 static struct cb_ops zfs_cb_ops = {
 	zfsdev_open,	/* open */
 	zfsdev_close,	/* close */
@@ -6356,7 +6356,7 @@ static struct modlinkage modlinkage = {
 	(void *)&zfs_modldrv,
 	NULL
 };
-#endif	/* sun */
+#endif	/* illumos */
 
 static struct cdevsw zfs_cdevsw = {
 	.d_version =	D_VERSION,
@@ -6389,7 +6389,7 @@ zfsdev_fini(void)
 static struct root_hold_token *zfs_root_token;
 struct proc *zfsproc;
 
-#ifdef sun
+#ifdef illumos
 int
 _init(void)
 {
@@ -6452,7 +6452,7 @@ _info(struct modinfo *modinfop)
 {
 	return (mod_info(&modlinkage, modinfop));
 }
-#endif	/* sun */
+#endif	/* illumos */
 
 static int zfs__init(void);
 static int zfs__fini(void);
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_replay.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_replay.c
index 6e0c24337bf5..96f777a95f3a 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_replay.c
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_replay.c
@@ -820,7 +820,7 @@ top:
 static int
 zfs_replay_truncate(zfsvfs_t *zfsvfs, lr_truncate_t *lr, boolean_t byteswap)
 {
-#ifdef sun
+#ifdef illumos
 	znode_t *zp;
 	flock64_t fl;
 	int error;
@@ -843,10 +843,10 @@ zfs_replay_truncate(zfsvfs_t *zfsvfs, lr_truncate_t *lr, boolean_t byteswap)
 	VN_RELE(ZTOV(zp));
 
 	return (error);
-#else	/* !sun */
+#else
 	ZFS_LOG(0, "Unexpected code path, report to pjd@FreeBSD.org");
 	return (EOPNOTSUPP);
-#endif	/* !sun */
+#endif
 }
 
 static int
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c
index 15d34df9a0bd..7b74145393b0 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c
@@ -1635,13 +1635,13 @@ zfs_mount(vfs_t *vfsp)
 	 * can be interrogated.
 	 */
 	if ((uap->flags & MS_DATA) && uap->datalen > 0)
-#else
+#else	/* !illumos */
 	if (!prison_allow(td->td_ucred, PR_ALLOW_MOUNT_ZFS))
 		return (SET_ERROR(EPERM));
 
 	if (vfs_getopt(vfsp->mnt_optnew, "from", (void **)&osname, NULL))
 		return (SET_ERROR(EINVAL));
-#endif	/* ! illumos */
+#endif	/* illumos */
 
 	/*
 	 * If full-owner-access is enabled and delegated administration is
@@ -1734,14 +1734,14 @@ zfs_mount(vfs_t *vfsp)
 	error = zfs_domount(vfsp, osname);
 	PICKUP_GIANT();
 
-#ifdef sun
+#ifdef illumos
 	/*
 	 * Add an extra VFS_HOLD on our parent vfs so that it can't
 	 * disappear due to a forced unmount.
 	 */
 	if (error == 0 && ((zfsvfs_t *)vfsp->vfs_data)->z_issnap)
 		VFS_HOLD(mvp->v_vfsp);
-#endif	/* sun */
+#endif
 
 out:
 	return (error);
@@ -1996,7 +1996,7 @@ zfs_umount(vfs_t *vfsp, int fflag)
 		return (ret);
 	}
 
-#ifdef sun
+#ifdef illumos
 	if (!(fflag & MS_FORCE)) {
 		/*
 		 * Check the number of active vnodes in the file system.
@@ -2321,7 +2321,7 @@ zfs_freevfs(vfs_t *vfsp)
 {
 	zfsvfs_t *zfsvfs = vfsp->vfs_data;
 
-#ifdef sun
+#ifdef illumos
 	/*
 	 * If this is a snapshot, we have an extra VFS_HOLD on our parent
 	 * from zfs_mount().  Release it here.  If we came through
@@ -2330,7 +2330,7 @@ zfs_freevfs(vfs_t *vfsp)
 	 */
 	if (zfsvfs->z_issnap && (vfsp != rootvfs))
 		VFS_RELE(zfsvfs->z_parent->z_vfs);
-#endif	/* sun */
+#endif
 
 	zfsvfs_free(zfsvfs);
 
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c
index 9b11652bb228..5bd67257b419 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c
@@ -311,7 +311,7 @@ zfs_ioctl(vnode_t *vp, u_long com, intptr_t data, int flag, cred_t *cred,
 
 	case _FIO_SEEK_DATA:
 	case _FIO_SEEK_HOLE:
-#ifdef sun
+#ifdef illumos
 		if (ddi_copyin((void *)data, &off, sizeof (off), flag))
 			return (SET_ERROR(EFAULT));
 #else
@@ -327,7 +327,7 @@ zfs_ioctl(vnode_t *vp, u_long com, intptr_t data, int flag, cred_t *cred,
 		ZFS_EXIT(zfsvfs);
 		if (error)
 			return (error);
-#ifdef sun
+#ifdef illumos
 		if (ddi_copyout(&off, (void *)data, sizeof (off), flag))
 			return (SET_ERROR(EFAULT));
 #else
@@ -714,7 +714,7 @@ zfs_read(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct)
 	ASSERT(uio->uio_loffset < zp->z_size);
 	n = MIN(uio->uio_resid, zp->z_size - uio->uio_loffset);
 
-#ifdef sun
+#ifdef illumos
 	if ((uio->uio_extflg == UIO_XUIO) &&
 	    (((xuio_t *)uio)->xu_type == UIOTYPE_ZEROCOPY)) {
 		int nblk;
@@ -743,7 +743,7 @@ zfs_read(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct)
 			}
 		}
 	}
-#endif	/* sun */
+#endif	/* illumos */
 
 	while (n > 0) {
 		nbytes = MIN(n, zfs_read_chunk_size -
@@ -885,7 +885,7 @@ zfs_write(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct)
 		return (error);
 	}
 
-#ifdef sun
+#ifdef illumos
 	/*
 	 * Pre-fault the pages to ensure slow (eg NFS) pages
 	 * don't hold up txg.
@@ -896,7 +896,7 @@ zfs_write(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct)
 		xuio = (xuio_t *)uio;
 	else
 		uio_prefaultpages(MIN(n, max_blksz), uio);
-#endif	/* sun */
+#endif
 
 	/*
 	 * If in append mode, set the io offset pointer to eof.
@@ -1148,10 +1148,10 @@ zfs_write(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct)
 		ASSERT(tx_bytes == nbytes);
 		n -= nbytes;
 
-#ifdef sun
+#ifdef illumos
 		if (!xuio && n > 0)
 			uio_prefaultpages(MIN(n, max_blksz), uio);
-#endif	/* sun */
+#endif
 	}
 
 	zfs_range_unlock(rl);
@@ -2823,7 +2823,7 @@ zfs_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr,
 	mutex_enter(&zp->z_lock);
 	vap->va_type = IFTOVT(zp->z_mode);
 	vap->va_mode = zp->z_mode & ~S_IFMT;
-#ifdef sun
+#ifdef illumos
 	vap->va_fsid = zp->z_zfsvfs->z_vfs->vfs_dev;
 #else
 	vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
@@ -2835,7 +2835,7 @@ zfs_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr,
 		links = zp->z_links;
 	vap->va_nlink = MIN(links, LINK_MAX);	/* nlink_t limit! */
 	vap->va_size = zp->z_size;
-#ifdef sun
+#ifdef illumos
 	vap->va_rdev = vp->v_rdev;
 #else
 	if (vp->v_type == VBLK || vp->v_type == VCHR)
@@ -4462,7 +4462,7 @@ top:
 	return (error);
 }
 
-#ifdef sun
+#ifdef illumos
 /*
  * zfs_null_putapage() is used when the file system has been force
  * unmounted. It just drops the pages.
@@ -4690,7 +4690,7 @@ out:
 	ZFS_EXIT(zfsvfs);
 	return (error);
 }
-#endif	/* sun */
+#endif	/* illumos */
 
 /*ARGSUSED*/
 void
@@ -4743,7 +4743,7 @@ zfs_inactive(vnode_t *vp, cred_t *cr, caller_context_t *ct)
 	rw_exit(&zfsvfs->z_teardown_inactive_lock);
 }
 
-#ifdef sun
+#ifdef illumos
 /*
  * Bounds-check the seek operation.
  *
@@ -5169,7 +5169,7 @@ zfs_space(vnode_t *vp, int cmd, flock64_t *bfp, int flag,
 	ZFS_EXIT(zfsvfs);
 	return (error);
 }
-#endif	/* sun */
+#endif	/* illumos */
 
 CTASSERT(sizeof(struct zfid_short) <= sizeof(struct fid));
 CTASSERT(sizeof(struct zfid_long) <= sizeof(struct fid));
@@ -5257,7 +5257,7 @@ zfs_pathconf(vnode_t *vp, int cmd, ulong_t *valp, cred_t *cr,
 	case _PC_FILESIZEBITS:
 		*valp = 64;
 		return (0);
-#ifdef sun
+#ifdef illumos
 	case _PC_XATTR_EXISTS:
 		zp = VTOZ(vp);
 		zfsvfs = zp->z_zfsvfs;
@@ -5295,16 +5295,16 @@ zfs_pathconf(vnode_t *vp, int cmd, ulong_t *valp, cred_t *cr,
 	case _PC_ACL_ENABLED:
 		*valp = _ACL_ACE_ENABLED;
 		return (0);
-#endif	/* sun */
+#endif	/* illumos */
 	case _PC_MIN_HOLE_SIZE:
 		*valp = (int)SPA_MINBLOCKSIZE;
 		return (0);
-#ifdef sun
+#ifdef illumos
 	case _PC_TIMESTAMP_RESOLUTION:
 		/* nanosecond timestamp resolution */
 		*valp = 1L;
 		return (0);
-#endif	/* sun */
+#endif
 	case _PC_ACL_EXTENDED:
 		*valp = 0;
 		return (0);
@@ -5363,7 +5363,7 @@ zfs_setsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr,
 	return (error);
 }
 
-#ifdef sun
+#ifdef illumos
 /*
  * The smallest read we may consider to loan out an arcbuf.
  * This must be a power of 2.
@@ -5694,7 +5694,7 @@ const fs_operation_def_t zfs_evnodeops_template[] = {
 	VOPNAME_PATHCONF,	{ .vop_pathconf = zfs_pathconf },
 	NULL,			NULL
 };
-#endif	/* sun */
+#endif	/* illumos */
 
 static int
 ioflags(int ioflags)
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_znode.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_znode.c
index f92ddd446b89..44b782096b20 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_znode.c
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_znode.c
@@ -172,7 +172,7 @@ static struct {
 } znode_move_stats;
 #endif	/* ZNODE_STATS */
 
-#ifdef sun
+#ifdef illumos
 static void
 zfs_znode_move_impl(znode_t *ozp, znode_t *nzp)
 {
@@ -343,7 +343,7 @@ zfs_znode_move(void *buf, void *newbuf, size_t size, void *arg)
 
 	return (KMEM_CBRC_YES);
 }
-#endif /* sun */
+#endif /* illumos */
 
 void
 zfs_znode_init(void)
@@ -362,12 +362,12 @@ zfs_znode_init(void)
 void
 zfs_znode_fini(void)
 {
-#ifdef sun
+#ifdef illumos
 	/*
 	 * Cleanup vfs & vnode ops
 	 */
 	zfs_remove_op_tables();
-#endif	/* sun */
+#endif
 
 	/*
 	 * Cleanup zcache
@@ -378,7 +378,7 @@ zfs_znode_fini(void)
 	rw_destroy(&zfsvfs_lock);
 }
 
-#ifdef sun
+#ifdef illumos
 struct vnodeops *zfs_dvnodeops;
 struct vnodeops *zfs_fvnodeops;
 struct vnodeops *zfs_symvnodeops;
@@ -470,7 +470,7 @@ zfs_create_op_tables()
 
 	return (error);
 }
-#endif	/* sun */
+#endif	/* illumos */
 
 int
 zfs_create_share_dir(zfsvfs_t *zfsvfs, dmu_tx_t *tx)
@@ -689,7 +689,7 @@ zfs_znode_alloc(zfsvfs_t *zfsvfs, dmu_buf_t *db, int blksz,
 	case VDIR:
 		zp->z_zn_prefetch = B_TRUE; /* z_prefetch default is enabled */
 		break;
-#ifdef sun
+#ifdef illumos
 	case VBLK:
 	case VCHR:
 		{
@@ -700,12 +700,12 @@ zfs_znode_alloc(zfsvfs_t *zfsvfs, dmu_buf_t *db, int blksz,
 			vp->v_rdev = zfs_cmpldev(rdev);
 		}
 		break;
-#endif	/* sun */
+#endif
 	case VFIFO:
-#ifdef sun
+#ifdef illumos
 	case VSOCK:
 	case VDOOR:
-#endif	/* sun */
+#endif
 		vp->v_op = &zfs_fifoops;
 		break;
 	case VREG:
@@ -714,14 +714,14 @@ zfs_znode_alloc(zfsvfs_t *zfsvfs, dmu_buf_t *db, int blksz,
 			vp->v_op = &zfs_shareops;
 		}
 		break;
-#ifdef sun
+#ifdef illumos
 	case VLNK:
 		vn_setops(vp, zfs_symvnodeops);
 		break;
 	default:
 		vn_setops(vp, zfs_evnodeops);
 		break;
-#endif	/* sun */
+#endif
 	}
 
 	mutex_enter(&zfsvfs->z_znodes_lock);
@@ -1490,7 +1490,7 @@ zfs_grow_blocksize(znode_t *zp, uint64_t size, dmu_tx_t *tx)
 	dmu_object_size_from_db(sa_get_db(zp->z_sa_hdl), &zp->z_blksz, &dummy);
 }
 
-#ifdef sun
+#ifdef illumos
 /*
  * This is a dummy interface used when pvn_vplist_dirty() should *not*
  * be calling back into the fs for a putpage().  E.g.: when truncating
@@ -1504,7 +1504,7 @@ zfs_no_putpage(vnode_t *vp, page_t *pp, u_offset_t *offp, size_t *lenp,
 	ASSERT(0);
 	return (0);
 }
-#endif	/* sun */
+#endif
 
 /*
  * Increase the file length
diff --git a/sys/cddl/contrib/opensolaris/uts/common/os/callb.c b/sys/cddl/contrib/opensolaris/uts/common/os/callb.c
index da397a5cca95..da479087f869 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/os/callb.c
+++ b/sys/cddl/contrib/opensolaris/uts/common/os/callb.c
@@ -368,7 +368,7 @@ callb_unlock_table(void)
 	mutex_exit(&ct->ct_lock);
 }
 
-#ifdef sun
+#ifdef illumos
 /*
  * Return a boolean value indicating whether a particular kernel thread is
  * stopped in accordance with the cpr callback protocol.  If returning
@@ -432,7 +432,7 @@ callb_is_stopped(kthread_id_t tp, caddr_t *thread_name)
 	mutex_exit(&ct->ct_lock);
 	return (ret_val);
 }
-#endif	/* sun */
+#endif	/* illumos */
 
 SYSINIT(sol_callb, SI_SUB_DRIVERS, SI_ORDER_FIRST, callb_init, NULL);
 SYSUNINIT(sol_callb, SI_SUB_DRIVERS, SI_ORDER_FIRST, callb_fini, NULL);
diff --git a/sys/cddl/contrib/opensolaris/uts/common/os/fm.c b/sys/cddl/contrib/opensolaris/uts/common/os/fm.c
index 66a860d66526..57b23356b12d 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/os/fm.c
+++ b/sys/cddl/contrib/opensolaris/uts/common/os/fm.c
@@ -79,7 +79,7 @@ static const char *fm_url = "http://www.sun.com/msg";
 static const char *fm_msgid = "SUNOS-8000-0G";
 static char *volatile fm_panicstr = NULL;
 
-#ifdef sun
+#ifdef illumos
 errorq_t *ereport_errorq;
 #endif
 void *ereport_dumpbuf;
@@ -112,7 +112,7 @@ static struct erpt_kstat erpt_kstat_data = {
 	{ "payload-set-failed", KSTAT_DATA_UINT64 }
 };
 
-#ifdef sun
+#ifdef illumos
 /*ARGSUSED*/
 static void
 fm_drain(void *private, void *data, errorq_elem_t *eep)
@@ -131,7 +131,7 @@ fm_init(void)
 {
 	kstat_t *ksp;
 
-#ifdef sun
+#ifdef illumos
 	(void) sysevent_evc_bind(FM_ERROR_CHAN,
 	    &ereport_chan, EVCH_CREAT | EVCH_HOLD_PEND);
 
@@ -145,7 +145,7 @@ fm_init(void)
 	if (ereport_size == 0)
 		ereport_size = ERPT_DATA_SZ;
 
-#ifdef sun
+#ifdef illumos
 	ereport_errorq = errorq_nvcreate("fm_ereport_queue",
 	    (errorq_func_t)fm_drain, NULL, ereport_qlen, ereport_size,
 	    FM_ERR_PIL, ERRORQ_VITAL);
@@ -170,7 +170,7 @@ fm_init(void)
 	}
 }
 
-#ifdef sun
+#ifdef illumos
 /*
  * Formatting utility function for fm_nvprintr.  We attempt to wrap chunks of
  * output so they aren't split across console lines, and return the end column.
@@ -528,7 +528,7 @@ fm_ereport_post(nvlist_t *ereport, int evc_flag)
 		return;
 	}
 
-#ifdef sun
+#ifdef illumos
 	if (sysevent_evc_bind(FM_ERROR_CHAN, &error_chan,
 	    EVCH_CREAT|EVCH_HOLD_PEND) != 0) {
 		atomic_inc_64(&erpt_kstat_data.erpt_dropped.value.ui64);
@@ -1262,7 +1262,7 @@ fm_ena_time_get(uint64_t ena)
 	return (time);
 }
 
-#ifdef sun
+#ifdef illumos
 /*
  * Convert a getpcstack() trace to symbolic name+offset, and add the resulting
  * string array to a Fault Management ereport as FM_EREPORT_PAYLOAD_NAME_STACK.
@@ -1290,7 +1290,7 @@ fm_payload_stack_add(nvlist_t *payload, const pc_t *stack, int depth)
 }
 #endif
 
-#ifdef sun
+#ifdef illumos
 void
 print_msg_hwerr(ctid_t ct_id, proc_t *p)
 {
diff --git a/sys/cddl/contrib/opensolaris/uts/common/sys/ctf.h b/sys/cddl/contrib/opensolaris/uts/common/sys/ctf.h
index 2d1987be459f..528814118e1c 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/sys/ctf.h
+++ b/sys/cddl/contrib/opensolaris/uts/common/sys/ctf.h
@@ -27,7 +27,7 @@
 #ifndef	_CTF_H
 #define	_CTF_H
 
-#if defined(sun)
+#ifdef illumos
 #pragma ident	"%Z%%M%	%I%	%E% SMI"
 #endif
 
diff --git a/sys/cddl/contrib/opensolaris/uts/common/sys/ctf_api.h b/sys/cddl/contrib/opensolaris/uts/common/sys/ctf_api.h
index 8e3f4cad1f0e..6b7ab01b6929 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/sys/ctf_api.h
+++ b/sys/cddl/contrib/opensolaris/uts/common/sys/ctf_api.h
@@ -69,7 +69,7 @@ typedef struct ctf_sect {
 	const char *cts_name;	/* section name (if any) */
 	ulong_t cts_type;	/* section type (ELF SHT_... value) */
 	ulong_t cts_flags;	/* section flags (ELF SHF_... value) */
-#if defined(sun)
+#ifdef illumos
 	const void *cts_data;	/* pointer to section data */
 #else
 	void *cts_data;		/* pointer to section data */
diff --git a/sys/cddl/contrib/opensolaris/uts/common/sys/dtrace.h b/sys/cddl/contrib/opensolaris/uts/common/sys/dtrace.h
index ca73689b9d5b..d449294d7507 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/sys/dtrace.h
+++ b/sys/cddl/contrib/opensolaris/uts/common/sys/dtrace.h
@@ -54,7 +54,7 @@ extern "C" {
 #include <sys/types.h>
 #include <sys/modctl.h>
 #include <sys/processor.h>
-#if defined(sun)
+#ifdef illumos
 #include <sys/systm.h>
 #else
 #include <sys/cpuvar.h>
@@ -65,7 +65,7 @@ extern "C" {
 typedef int model_t;
 #endif
 #include <sys/ctf_api.h>
-#if defined(sun)
+#ifdef illumos
 #include <sys/cyclic.h>
 #include <sys/int_limits.h>
 #else
@@ -257,7 +257,7 @@ typedef enum dtrace_probespec {
 #define	DIF_VAR_ERRNO		0x0120	/* thread errno */
 #define	DIF_VAR_EXECARGS	0x0121	/* process arguments */
 
-#if !defined(sun)
+#ifndef illumos
 #define	DIF_VAR_CPU		0x0200
 #endif
 
@@ -1277,7 +1277,7 @@ typedef struct dtrace_providerdesc {
  * pseudodevice driver.  These ioctls comprise the user-kernel interface to
  * DTrace.
  */
-#if defined(sun)
+#ifdef illumos
 #define	DTRACEIOC		(('d' << 24) | ('t' << 16) | ('r' << 8))
 #define	DTRACEIOC_PROVIDER	(DTRACEIOC | 1)		/* provider query */
 #define	DTRACEIOC_PROBES	(DTRACEIOC | 2)		/* probe query */
@@ -1408,7 +1408,7 @@ typedef struct {
  * helpers and should no longer be used.  No other ioctls are valid on the
  * helper minor node.
  */
-#if defined(sun)
+#ifdef illumos
 #define	DTRACEHIOC		(('d' << 24) | ('t' << 16) | ('h' << 8))
 #define	DTRACEHIOC_ADD		(DTRACEHIOC | 1)	/* add helper */
 #define	DTRACEHIOC_REMOVE	(DTRACEHIOC | 2)	/* remove helper */
@@ -1423,7 +1423,7 @@ typedef struct dof_helper {
 	char dofhp_mod[DTRACE_MODNAMELEN];	/* executable or library name */
 	uint64_t dofhp_addr;			/* base address of object */
 	uint64_t dofhp_dof;			/* address of helper DOF */
-#if !defined(sun)
+#ifndef illumos
 	int gen;
 #endif
 } dof_helper_t;
@@ -2325,7 +2325,7 @@ typedef enum dtrace_vtime_state {
 	DTRACE_VTIME_ACTIVE_TNF		/* DTrace virtual time _and_ TNF */
 } dtrace_vtime_state_t;
 
-#if defined(sun)
+#ifdef illumos
 extern dtrace_vtime_state_t dtrace_vtime_active;
 #endif
 extern void dtrace_vtime_switch(kthread_t *next);
@@ -2337,7 +2337,7 @@ extern void dtrace_vtime_disable(void);
 struct regs;
 struct reg;
 
-#if defined(sun)
+#ifdef illumos
 extern int (*dtrace_pid_probe_ptr)(struct reg *);
 extern int (*dtrace_return_probe_ptr)(struct reg *);
 extern void (*dtrace_fasttrap_fork_ptr)(proc_t *, proc_t *);
@@ -2356,7 +2356,7 @@ extern void dtrace_membar_producer(void);
 extern void dtrace_membar_consumer(void);
 
 extern void (*dtrace_cpu_init)(processorid_t);
-#if defined(sun)
+#ifdef illumos
 extern void (*dtrace_modload)(modctl_t *);
 extern void (*dtrace_modunload)(modctl_t *);
 #endif
@@ -2370,7 +2370,7 @@ extern void (*dtrace_debugger_init)(void);
 extern void (*dtrace_debugger_fini)(void);
 extern dtrace_cacheid_t dtrace_predcache_id;
 
-#if defined(sun)
+#ifdef illumos
 extern hrtime_t dtrace_gethrtime(void);
 #else
 void dtrace_debug_printf(const char *, ...) __printflike(1, 2);
@@ -2399,7 +2399,7 @@ extern int dtrace_blksuword32(uintptr_t, uint32_t *, int);
 extern void dtrace_getfsr(uint64_t *);
 #endif
 
-#if !defined(sun)
+#ifndef illumos
 extern void dtrace_helpers_duplicate(proc_t *, proc_t *);
 extern void dtrace_helpers_destroy(proc_t *);
 #endif
diff --git a/sys/cddl/contrib/opensolaris/uts/common/sys/dtrace_impl.h b/sys/cddl/contrib/opensolaris/uts/common/sys/dtrace_impl.h
index f9e96895c46c..a65d1ae16c18 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/sys/dtrace_impl.h
+++ b/sys/cddl/contrib/opensolaris/uts/common/sys/dtrace_impl.h
@@ -50,7 +50,7 @@ extern "C" {
  */
 
 #include <sys/dtrace.h>
-#if !defined(sun)
+#ifndef illumos
 #ifdef __sparcv9
 typedef uint32_t		pc_t;
 #else
@@ -1122,7 +1122,7 @@ typedef struct dtrace_cred {
  * dtrace_state structure.
  */
 struct dtrace_state {
-#if defined(sun)
+#ifdef illumos
 	dev_t dts_dev;				/* device */
 #else
 	struct cdev *dts_dev;			/* device */
@@ -1140,7 +1140,7 @@ struct dtrace_state {
 	int dts_nspeculations;			/* number of speculations */
 	int dts_naggregations;			/* number of aggregations */
 	dtrace_aggregation_t **dts_aggregations; /* aggregation array */
-#if defined(sun)
+#ifdef illumos
 	vmem_t *dts_aggid_arena;		/* arena for aggregation IDs */
 #else
 	struct unrhdr *dts_aggid_arena;		/* arena for aggregation IDs */
@@ -1152,7 +1152,7 @@ struct dtrace_state {
 	uint32_t dts_dblerrors;			/* errors in ERROR probes */
 	uint32_t dts_reserve;			/* space reserved for END */
 	hrtime_t dts_laststatus;		/* time of last status */
-#if defined(sun)
+#ifdef illumos
 	cyclic_id_t dts_cleaner;		/* cleaning cyclic */
 	cyclic_id_t dts_deadman;		/* deadman cyclic */
 #else
@@ -1270,7 +1270,7 @@ typedef struct dtrace_toxrange {
 	uintptr_t	dtt_limit;		/* limit of toxic range */
 } dtrace_toxrange_t;
 
-#if defined(sun)
+#ifdef illumos
 extern uint64_t dtrace_getarg(int, int);
 #else
 extern uint64_t __noinline dtrace_getarg(int, int);
@@ -1300,7 +1300,7 @@ extern void dtrace_probe_error(dtrace_state_t *, dtrace_epid_t, int, int,
     int, uintptr_t);
 extern int dtrace_assfail(const char *, const char *, int);
 extern int dtrace_attached(void);
-#if defined(sun)
+#ifdef illumos
 extern hrtime_t dtrace_gethrestime(void);
 #endif
 
diff --git a/sys/cddl/contrib/opensolaris/uts/common/sys/fasttrap.h b/sys/cddl/contrib/opensolaris/uts/common/sys/fasttrap.h
index 431307f46a2b..ec3582f5daa8 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/sys/fasttrap.h
+++ b/sys/cddl/contrib/opensolaris/uts/common/sys/fasttrap.h
@@ -37,7 +37,7 @@
 extern "C" {
 #endif
 
-#if defined(sun)
+#ifdef illumos
 #define	FASTTRAPIOC		(('m' << 24) | ('r' << 16) | ('f' << 8))
 #define	FASTTRAPIOC_MAKEPROBE	(FASTTRAPIOC | 1)
 #define	FASTTRAPIOC_GETINSTR	(FASTTRAPIOC | 2)
diff --git a/sys/cddl/contrib/opensolaris/uts/common/sys/fasttrap_impl.h b/sys/cddl/contrib/opensolaris/uts/common/sys/fasttrap_impl.h
index 6f591fa83dda..cae919377c20 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/sys/fasttrap_impl.h
+++ b/sys/cddl/contrib/opensolaris/uts/common/sys/fasttrap_impl.h
@@ -79,7 +79,7 @@ extern "C" {
  * until it exits.
  */
 
-#if !defined(sun)
+#ifndef illumos
 typedef struct fasttrap_scrblock {
 	vm_offset_t ftsb_addr;			/* address of a scratch block */
 	LIST_ENTRY(fasttrap_scrblock) ftsb_next;/* next block in list */
@@ -99,7 +99,7 @@ typedef struct fasttrap_proc {
 	uint64_t ftpc_rcount;			/* count of extant providers */
 	kmutex_t ftpc_mtx;			/* lock on all but acount */
 	struct fasttrap_proc *ftpc_next;	/* next proc in hash chain */
-#if !defined(sun)
+#ifndef illumos
 	LIST_HEAD(, fasttrap_scrblock) ftpc_scrblks; /* mapped scratch blocks */
 	LIST_HEAD(, fasttrap_scrspace) ftpc_fscr; /* free scratch space */
 	LIST_HEAD(, fasttrap_scrspace) ftpc_ascr; /* used scratch space */
@@ -198,7 +198,7 @@ typedef struct fasttrap_hash {
 #endif
 
 extern void fasttrap_sigtrap(proc_t *, kthread_t *, uintptr_t);
-#if !defined(sun)
+#ifndef illumos
 extern fasttrap_scrspace_t *fasttrap_scraddr(struct thread *,
     fasttrap_proc_t *);
 #endif
diff --git a/sys/cddl/contrib/opensolaris/uts/common/sys/isa_defs.h b/sys/cddl/contrib/opensolaris/uts/common/sys/isa_defs.h
index d70a760683d9..114c9665bac7 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/sys/isa_defs.h
+++ b/sys/cddl/contrib/opensolaris/uts/common/sys/isa_defs.h
@@ -235,7 +235,7 @@ extern "C" {
 /*
  * Define the appropriate "processor characteristics"
  */
-#if defined(sun)
+#ifdef illumos
 #define	_LITTLE_ENDIAN
 #endif
 #define	_STACK_GROWS_DOWNWARD
@@ -302,7 +302,7 @@ extern "C" {
 /*
  * Define the appropriate "processor characteristics"
  */
-#if defined(sun)
+#ifdef illumos
 #define	_LITTLE_ENDIAN
 #endif
 #define	_STACK_GROWS_DOWNWARD
@@ -508,7 +508,7 @@ extern "C" {
  * Define the appropriate "processor characteristics" shared between
  * all Solaris on SPARC systems.
  */
-#if defined(sun)
+#ifdef illumos
 #define	_BIG_ENDIAN
 #endif
 #define	_STACK_GROWS_DOWNWARD
diff --git a/sys/cddl/contrib/opensolaris/uts/common/sys/procset.h b/sys/cddl/contrib/opensolaris/uts/common/sys/procset.h
index 8c5739b3bc28..a7d58e52534c 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/sys/procset.h
+++ b/sys/cddl/contrib/opensolaris/uts/common/sys/procset.h
@@ -143,7 +143,7 @@ typedef struct procset {
 
 #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */
 
-#if defined(sun)
+#ifdef illumos
 #ifdef _KERNEL
 
 struct proc;
diff --git a/sys/cddl/contrib/opensolaris/uts/common/sys/sysevent.h b/sys/cddl/contrib/opensolaris/uts/common/sys/sysevent.h
index 3558c2a7f03d..777d7480cf08 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/sys/sysevent.h
+++ b/sys/cddl/contrib/opensolaris/uts/common/sys/sysevent.h
@@ -214,7 +214,7 @@ typedef struct sysevent_value {
 #define	EVCH_SET_CHAN_LEN	 3	/* Set event queue length */
 #define	EVCH_CMD_LAST		 EVCH_SET_CHAN_LEN	/* Last command */
 
-#ifdef sun
+#ifdef illumos
 /*
  * Shared user/kernel event channel interface definitions
  */
@@ -228,11 +228,11 @@ extern int sysevent_evc_publish(evchan_t *, const char *, const char *,
 extern int sysevent_evc_control(evchan_t *, int, ...);
 extern int sysevent_evc_setpropnvl(evchan_t *, nvlist_t *);
 extern int sysevent_evc_getpropnvl(evchan_t *, nvlist_t **);
-#endif	/* sun */
+#endif	/* illumos */
 
 #ifndef	_KERNEL
 
-#ifdef sun
+#ifdef illumos
 /*
  * Userland-only event channel interfaces
  */
@@ -254,7 +254,7 @@ extern void sysevent_subattr_thrsetup(sysevent_subattr_t *,
 
 extern int sysevent_evc_xsubscribe(evchan_t *, const char *, const char *,
     int (*)(sysevent_t *, void *), void *, uint32_t, sysevent_subattr_t *);
-#endif	/* sun */
+#endif	/* illumos */
 
 #else
 
@@ -270,7 +270,7 @@ extern int sysevent_add_attr(sysevent_attr_list_t **, char *,
 extern void sysevent_free_attr(sysevent_attr_list_t *);
 extern int sysevent_attach_attributes(sysevent_t *, sysevent_attr_list_t *);
 extern void sysevent_detach_attributes(sysevent_t *);
-#ifdef sun
+#ifdef illumos
 extern char *sysevent_get_class_name(sysevent_t *);
 extern char *sysevent_get_subclass_name(sysevent_t *);
 extern uint64_t sysevent_get_seq(sysevent_t *);
@@ -278,7 +278,7 @@ extern void sysevent_get_time(sysevent_t *, hrtime_t *);
 extern size_t sysevent_get_size(sysevent_t *);
 extern char *sysevent_get_pub(sysevent_t *);
 extern int sysevent_get_attr_list(sysevent_t *, nvlist_t **);
-#endif	/* sun */
+#endif	/* illumos */
 
 #endif	/* _KERNEL */
 
diff --git a/sys/cddl/contrib/opensolaris/uts/common/sys/sysmacros.h b/sys/cddl/contrib/opensolaris/uts/common/sys/sysmacros.h
index 0d98b263583b..300351482c10 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/sys/sysmacros.h
+++ b/sys/cddl/contrib/opensolaris/uts/common/sys/sysmacros.h
@@ -112,7 +112,7 @@ extern unsigned char bcd_to_byte[256];
 #define	L_MAXMIN	L_MAXMIN32
 #endif
 
-#ifdef sun
+#ifdef illumos
 #ifdef _KERNEL
 
 /* major part of a device internal to the kernel */
@@ -172,7 +172,7 @@ extern unsigned char bcd_to_byte[256];
 #define	getemajor(x)	(major_t)((((dev_t)(x) >> L_BITSMINOR) > L_MAXMAJ) ? \
 			    NODEV : (((dev_t)(x) >> L_BITSMINOR) & L_MAXMAJ))
 #define	geteminor(x)	(minor_t)((x) & L_MAXMIN)
-#endif /* sun */
+#endif /* illumos */
 
 /*
  * These are versions of the kernel routines for compressing and
diff --git a/sys/cddl/contrib/opensolaris/uts/common/sys/u8_textprep.h b/sys/cddl/contrib/opensolaris/uts/common/sys/u8_textprep.h
index 77c9c0bf84fe..1496fa356835 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/sys/u8_textprep.h
+++ b/sys/cddl/contrib/opensolaris/uts/common/sys/u8_textprep.h
@@ -36,7 +36,7 @@
 extern "C" {
 #endif
 
-#ifdef sun
+#ifdef illumos
 /*
  * Unicode encoding conversion functions and their macros.
  */
@@ -58,7 +58,7 @@ extern int uconv_u32tou16(const uint32_t *, size_t *, uint16_t *, size_t *,
 extern int uconv_u32tou8(const uint32_t *, size_t *, uchar_t *, size_t *, int);
 extern int uconv_u8tou16(const uchar_t *, size_t *, uint16_t *, size_t *, int);
 extern int uconv_u8tou32(const uchar_t *, size_t *, uint32_t *, size_t *, int);
-#endif	/* sun */
+#endif	/* illumos */
 
 /*
  * UTF-8 text preparation functions and their macros.
diff --git a/sys/cddl/contrib/opensolaris/uts/intel/dtrace/fasttrap_isa.c b/sys/cddl/contrib/opensolaris/uts/intel/dtrace/fasttrap_isa.c
index 8df1090da813..5d60a07cdc9a 100644
--- a/sys/cddl/contrib/opensolaris/uts/intel/dtrace/fasttrap_isa.c
+++ b/sys/cddl/contrib/opensolaris/uts/intel/dtrace/fasttrap_isa.c
@@ -28,7 +28,7 @@
  * Use is subject to license terms.
  */
 
-#if defined(sun)
+#ifdef illumos
 #pragma ident	"%Z%%M%	%I%	%E% SMI"
 #endif
 
@@ -37,7 +37,7 @@
 #include <sys/dtrace.h>
 #include <sys/dtrace_impl.h>
 #include <sys/cmn_err.h>
-#if defined(sun)
+#ifdef illumos
 #include <sys/regset.h>
 #include <sys/privregs.h>
 #include <sys/segments.h>
@@ -53,7 +53,7 @@
 #include <machine/pcb.h>
 #endif
 #include <sys/sysmacros.h>
-#if defined(sun)
+#ifdef illumos
 #include <sys/trap.h>
 #include <sys/archsystm.h>
 #else
@@ -97,7 +97,7 @@ uwrite(proc_t *p, void *kaddr, size_t len, uintptr_t uaddr)
 
 	return (proc_ops(UIO_WRITE, p, kaddr, uaddr, len));
 }
-#endif /* sun */
+#endif /* illumos */
 #ifdef __i386__
 #define	r_rax	r_eax
 #define	r_rbx	r_ebx
@@ -747,11 +747,11 @@ fasttrap_return_common(struct reg *rp, uintptr_t pc, pid_t pid,
 	fasttrap_tracepoint_t *tp;
 	fasttrap_bucket_t *bucket;
 	fasttrap_id_t *id;
-#if defined(sun)
+#ifdef illumos
 	kmutex_t *pid_mtx;
 #endif
 
-#if defined(sun)
+#ifdef illumos
 	pid_mtx = &cpu_core[CPU->cpu_id].cpuc_pid_lock;
 	mutex_enter(pid_mtx);
 #endif
@@ -769,7 +769,7 @@ fasttrap_return_common(struct reg *rp, uintptr_t pc, pid_t pid,
 	 * is not essential to the correct execution of the process.
 	 */
 	if (tp == NULL) {
-#if defined(sun)
+#ifdef illumos
 		mutex_exit(pid_mtx);
 #endif
 		return;
@@ -792,7 +792,7 @@ fasttrap_return_common(struct reg *rp, uintptr_t pc, pid_t pid,
 		    rp->r_rax, rp->r_rbx, 0, 0);
 	}
 
-#if defined(sun)
+#ifdef illumos
 	mutex_exit(pid_mtx);
 #endif
 }
@@ -800,7 +800,7 @@ fasttrap_return_common(struct reg *rp, uintptr_t pc, pid_t pid,
 static void
 fasttrap_sigsegv(proc_t *p, kthread_t *t, uintptr_t addr)
 {
-#if defined(sun)
+#ifdef illumos
 	sigqueue_t *sqp = kmem_zalloc(sizeof (sigqueue_t), KM_SLEEP);
 
 	sqp->sq_info.si_signo = SIGSEGV;
@@ -1001,13 +1001,13 @@ int
 fasttrap_pid_probe(struct reg *rp)
 {
 	proc_t *p = curproc;
-#if !defined(sun)
+#ifndef illumos
 	proc_t *pp;
 #endif
 	uintptr_t pc = rp->r_rip - 1;
 	uintptr_t new_pc = 0;
 	fasttrap_bucket_t *bucket;
-#if defined(sun)
+#ifdef illumos
 	kmutex_t *pid_mtx;
 #endif
 	fasttrap_tracepoint_t *tp, tp_local;
@@ -1044,7 +1044,7 @@ fasttrap_pid_probe(struct reg *rp)
 	 * parent. We know that there's only one thread of control in such a
 	 * process: this one.
 	 */
-#if defined(sun)
+#ifdef illumos
 	while (p->p_flag & SVFORK) {
 		p = p->p_parent;
 	}
@@ -1082,7 +1082,7 @@ fasttrap_pid_probe(struct reg *rp)
 	 * fasttrap_ioctl), or somehow we have mislaid this tracepoint.
 	 */
 	if (tp == NULL) {
-#if defined(sun)
+#ifdef illumos
 		mutex_exit(pid_mtx);
 #else
 		_PRELE(p);
@@ -1209,7 +1209,7 @@ fasttrap_pid_probe(struct reg *rp)
 	 * tracepoint again later if we need to light up any return probes.
 	 */
 	tp_local = *tp;
-#if defined(sun)
+#ifdef illumos
 	mutex_exit(pid_mtx);
 #else
 	PROC_UNLOCK(p);
@@ -1537,7 +1537,7 @@ fasttrap_pid_probe(struct reg *rp)
 		uint8_t scratch[2 * FASTTRAP_MAX_INSTR_SIZE + 7];
 #endif
 		uint_t i = 0;
-#if defined(sun)
+#ifdef illumos
 		klwp_t *lwp = ttolwp(curthread);
 
 		/*
@@ -1558,7 +1558,7 @@ fasttrap_pid_probe(struct reg *rp)
 		addr = USD_GETBASE(&lwp->lwp_pcb.pcb_gsdesc);
 		addr += sizeof (void *);
 #endif
-#else
+#else	/* !illumos */
 		fasttrap_scrspace_t *scrspace;
 		scrspace = fasttrap_scraddr(curthread, tp->ftt_proc);
 		if (scrspace == NULL) {
@@ -1574,7 +1574,7 @@ fasttrap_pid_probe(struct reg *rp)
 			break;
 		}
 		addr = scrspace->ftss_addr;
-#endif /* sun */
+#endif /* illumos */
 
 		/*
 		 * Generic Instruction Tracing
@@ -1760,7 +1760,7 @@ fasttrap_pid_probe(struct reg *rp)
 
 		ASSERT(i <= sizeof (scratch));
 
-#if defined(sun)
+#ifdef illumos
 		if (fasttrap_copyout(scratch, (char *)addr, i)) {
 #else
 		if (uwrite(p, scratch, i, addr)) {
@@ -1822,7 +1822,7 @@ done:
 
 	rp->r_rip = new_pc;
 
-#if !defined(sun)
+#ifndef illumos
 	PROC_LOCK(p);
 	proc_write_regs(curthread, rp);
 	_PRELE(p);
@@ -1844,7 +1844,7 @@ fasttrap_return_probe(struct reg *rp)
 	curthread->t_dtrace_scrpc = 0;
 	curthread->t_dtrace_astpc = 0;
 
-#if defined(sun)
+#ifdef illumos
 	/*
 	 * Treat a child created by a call to vfork(2) as if it were its
 	 * parent. We know that there's only one thread of control in such a
@@ -1917,7 +1917,7 @@ fasttrap_getreg(struct reg *rp, uint_t reg)
 	case REG_ERR:		return (rp->r_err);
 	case REG_RIP:		return (rp->r_rip);
 	case REG_CS:		return (rp->r_cs);
-#if defined(sun)
+#ifdef illumos
 	case REG_RFL:		return (rp->r_rfl);
 #endif
 	case REG_RSP:		return (rp->r_rsp);
diff --git a/sys/cddl/dev/dtrace/amd64/instr_size.c b/sys/cddl/dev/dtrace/amd64/instr_size.c
index 1acf2c5813ea..b3afcb744a58 100644
--- a/sys/cddl/dev/dtrace/amd64/instr_size.c
+++ b/sys/cddl/dev/dtrace/amd64/instr_size.c
@@ -30,14 +30,14 @@
 /*	  All Rights Reserved	*/
 
 
-#if defined(sun)
+#ifdef illumos
 #pragma ident	"@(#)instr_size.c	1.14	05/07/08 SMI"
 #endif
 
 #include <sys/types.h>
 #include <sys/param.h>
 #include <sys/proc.h>
-#if defined(sun)
+#ifdef illumos
 #include <sys/cmn_err.h>
 #include <sys/archsystm.h>
 #include <sys/copyops.h>
@@ -104,7 +104,7 @@ dtrace_dis_isize(uchar_t *instr, dis_isize_t which, model_t model, int *rmindex)
 	dis86_t	x;
 	uint_t mode = SIZE64;
 
-#if defined(sun)
+#ifdef illumos
 	mode = (model == DATAMODEL_LP64) ? SIZE64 : SIZE32;
 #endif
 
diff --git a/sys/cddl/dev/dtrace/dtrace_ioctl.c b/sys/cddl/dev/dtrace/dtrace_ioctl.c
index e26109116131..ef9bed561c15 100644
--- a/sys/cddl/dev/dtrace/dtrace_ioctl.c
+++ b/sys/cddl/dev/dtrace/dtrace_ioctl.c
@@ -578,14 +578,14 @@ dtrace_ioctl(struct cdev *dev, u_long cmd, caddr_t addr,
 			return (EINVAL);
 
 		mutex_enter(&dtrace_provider_lock);
-#if defined(sun)
+#ifdef illumos
 		mutex_enter(&mod_lock);
 #endif
 		mutex_enter(&dtrace_lock);
 
 		if (desc->dtargd_id > dtrace_nprobes) {
 			mutex_exit(&dtrace_lock);
-#if defined(sun)
+#ifdef illumos
 			mutex_exit(&mod_lock);
 #endif
 			mutex_exit(&dtrace_provider_lock);
@@ -594,7 +594,7 @@ dtrace_ioctl(struct cdev *dev, u_long cmd, caddr_t addr,
 
 		if ((probe = dtrace_probes[desc->dtargd_id - 1]) == NULL) {
 			mutex_exit(&dtrace_lock);
-#if defined(sun)
+#ifdef illumos
 			mutex_exit(&mod_lock);
 #endif
 			mutex_exit(&dtrace_provider_lock);
@@ -620,7 +620,7 @@ dtrace_ioctl(struct cdev *dev, u_long cmd, caddr_t addr,
 			    probe->dtpr_id, probe->dtpr_arg, desc);
 		}
 
-#if defined(sun)
+#ifdef illumos
 		mutex_exit(&mod_lock);
 #endif
 		mutex_exit(&dtrace_provider_lock);
@@ -779,7 +779,7 @@ dtrace_ioctl(struct cdev *dev, u_long cmd, caddr_t addr,
 		dstate = &state->dts_vstate.dtvs_dynvars;
 
 		for (i = 0; i < NCPU; i++) {
-#if !defined(sun)
+#ifndef illumos
 			if (pcpu_find(i) == NULL)
 				continue;
 #endif
diff --git a/sys/cddl/dev/dtrace/i386/instr_size.c b/sys/cddl/dev/dtrace/i386/instr_size.c
index 7f667f7e5ca5..11fbf9b3434c 100644
--- a/sys/cddl/dev/dtrace/i386/instr_size.c
+++ b/sys/cddl/dev/dtrace/i386/instr_size.c
@@ -30,14 +30,14 @@
 /*	  All Rights Reserved	*/
 
 
-#if defined(sun)
+#ifdef illumos
 #pragma ident	"@(#)instr_size.c	1.14	05/07/08 SMI"
 #endif
 
 #include <sys/types.h>
 #include <sys/param.h>
 #include <sys/proc.h>
-#if defined(sun)
+#ifdef illumos
 #include <sys/cmn_err.h>
 #include <sys/archsystm.h>
 #include <sys/copyops.h>
@@ -104,7 +104,7 @@ dtrace_dis_isize(uchar_t *instr, dis_isize_t which, model_t model, int *rmindex)
 	dis86_t	x;
 	uint_t mode = SIZE32;
 
-#if defined(sun)
+#ifdef illumos
 	mode = (model == DATAMODEL_LP64) ? SIZE64 : SIZE32;
 #endif
 
diff --git a/sys/cddl/dev/dtrace/x86/regset.h b/sys/cddl/dev/dtrace/x86/regset.h
index b1c5116f3d29..ad12e26a5aec 100644
--- a/sys/cddl/dev/dtrace/x86/regset.h
+++ b/sys/cddl/dev/dtrace/x86/regset.h
@@ -61,7 +61,7 @@ extern "C" {
 
 #define	REG_GSBASE	27
 #define	REG_FSBASE	26
-#if defined(sun)
+#ifdef illumos
 #define	REG_DS		25
 #define	REG_ES		24
 
@@ -89,7 +89,7 @@ extern "C" {
 #define	REG_R13		2
 #define	REG_R14		1
 #define	REG_R15		0
-#else
+#else	/* !illumos */
 #define	REG_SS		25
 #define	REG_RSP		24
 #define	REG_RFL		23
@@ -116,13 +116,13 @@ extern "C" {
 #define	REG_R13		2
 #define	REG_R14		1
 #define	REG_R15		0
-#endif
+#endif	/* illumos */
 
 /*
  * The names and offsets defined here are specified by i386 ABI suppl.
  */
 
-#if defined(sun)
+#ifdef illumos
 #define	SS		18	/* only stored on a privilege transition */
 #define	UESP		17	/* only stored on a privilege transition */
 #define	EFL		16
@@ -142,7 +142,7 @@ extern "C" {
 #define	ES		2
 #define	FS		1
 #define	GS		0
-#else
+#else	/* !illumos */
 #define	GS		18
 #define	SS		17	/* only stored on a privilege transition */
 #define	UESP		16	/* only stored on a privilege transition */
@@ -162,7 +162,7 @@ extern "C" {
 #define	DS		2
 #define	ES		1
 #define	FS		0
-#endif
+#endif	/* illumos */
 
 #define REG_PC  EIP
 #define REG_FP  EBP