Originally when DEVFS was added, a global variable "devfs_present"

was used to control code which were conditional on DEVFS' precense
since this avoided the need for large-scale source pollution with
#include "opt_geom.h"

Now that we approach making DEVFS standard, replace these tests
with an #ifdef to facilitate mechanical removal once DEVFS becomes
non-optional.

No functional change by this commit.

sys/fs/devfs/devfs_devs.c

@@ -450,7 +450,6 @@ devfs_init(void *junk)
 {
 	devfs_create_hook = devfs_create;
 	devfs_destroy_hook = devfs_destroy;
-	devfs_present = 1;
 	devfs_rules_init();
 }
 

sys/kern/init_main.c

@@ -554,21 +554,21 @@ start_init(void *dummy)
 	mac_create_root_mount(td->td_ucred, TAILQ_FIRST(&mountlist));
 #endif
 
-	if (devfs_present) {
-		/*
-		 * For disk based systems, we probably cannot do this yet
-		 * since the fs will be read-only.  But a NFS root
-		 * might be ok.  It is worth a shot.
-		 */
-		error = kern_mkdir(td, "/dev", UIO_SYSSPACE, 0700);
-		if (error == EEXIST)
-			error = 0;
-		if (error == 0)
-			error = kernel_vmount(0, "fstype", "devfs",
-			    "fspath", "/dev", NULL);
-		if (error != 0)
-			init_does_devfs = 1;
-	}
+#ifndef NODEVFS
+	/*
+	 * For disk based systems, we probably cannot do this yet
+	 * since the fs will be read-only.  But a NFS root
+	 * might be ok.  It is worth a shot.
+	 */
+	error = kern_mkdir(td, "/dev", UIO_SYSSPACE, 0700);
+	if (error == EEXIST)
+		error = 0;
+	if (error == 0)
+		error = kernel_vmount(0, "fstype", "devfs",
+		    "fspath", "/dev", NULL);
+	if (error != 0)
+		init_does_devfs = 1;
+#endif
 
 	/*
 	 * Need just enough stack to hold the faked-up "execve()" arguments.

sys/kern/kern_conf.c

@@ -62,7 +62,6 @@ static LIST_HEAD(, cdev) dev_free;
 
 devfs_create_t *devfs_create_hook;
 devfs_destroy_t *devfs_destroy_hook;
-int devfs_present;
 
 static int ready_for_devs;
 
@@ -81,9 +80,11 @@ devsw(dev_t dev)
 	disk_dev_synth(dev);
 	if (dev->si_devsw)
 		return (dev->si_devsw);
-	if (devfs_present)
-		return (NULL);
+#ifndef NODEVFS
+	return (NULL);
+#else
         return(cdevsw[major(dev)]);
+#endif
 }
 
 /*

sys/kern/kern_descrip.c

@@ -2152,13 +2152,15 @@ fildesc_drvinit(void *unused)
 	make_dev_alias(dev, "stdout");
 	dev = make_dev(&fildesc_cdevsw, 2, UID_ROOT, GID_WHEEL, 0666, "fd/2");
 	make_dev_alias(dev, "stderr");
-	if (!devfs_present) {
-		int fd;
+#ifdef NODEVFS
+	{
+	int fd;
 
-		for (fd = 3; fd < NUMFDESC; fd++)
-			make_dev(&fildesc_cdevsw, fd, UID_ROOT, GID_WHEEL,
-			    0666, "fd/%d", fd);
+	for (fd = 3; fd < NUMFDESC; fd++)
+		make_dev(&fildesc_cdevsw, fd, UID_ROOT, GID_WHEEL,
+		    0666, "fd/%d", fd);
 	}
+#endif
 }
 
 static fo_rdwr_t	badfo_readwrite;

sys/kern/tty_tty.c

@@ -361,12 +361,7 @@ ctty_drvinit(unused)
 	void *unused;
 {
 
-	if (devfs_present) {
-		EVENTHANDLER_REGISTER(dev_clone, ctty_clone, 0, 1000);
-		ctty = make_dev(&ctty_cdevsw, 0, 0, 0, 0666, "ctty");
-	} else {
-		make_dev(&ctty_cdevsw, 0, 0, 0, 0666, "tty");
-	}
+	make_dev(&ctty_cdevsw, 0, 0, 0, 0666, "tty");
 }
 
 SYSINIT(cttydev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,ctty_drvinit,NULL)

sys/net/if_tap.c

@@ -178,13 +178,13 @@ tapmodevent(mod, type, data)
 			goto bail2;
 		}
 
-		if (!devfs_present) {
-			error = cdevsw_add(&tap_cdevsw);
-			if (error != 0) {
-				EVENTHANDLER_DEREGISTER(dev_clone, eh_tag);
-				goto bail2;
-			}
+#ifdef NODEVFS
+		error = cdevsw_add(&tap_cdevsw);
+		if (error != 0) {
+			EVENTHANDLER_DEREGISTER(dev_clone, eh_tag);
+			goto bail2;
 		}
+#endif
 
 		return (0);
 bail2:
@@ -229,8 +229,9 @@ tapmodevent(mod, type, data)
  		if (tapbasedev != NOUDEV)
 			destroy_dev(udev2dev(tapbasedev, 0));
 
-                if (!devfs_present)
-                        cdevsw_remove(&tap_cdevsw);
+#ifdef NODEVFS
+		cdevsw_remove(&tap_cdevsw);
+#endif
 
 		break;
 

sys/net/if_tun.c

@@ -147,13 +147,13 @@ tunmodevent(module_t mod, int type, void *data)
 		tag = EVENTHANDLER_REGISTER(dev_clone, tunclone, 0, 1000);
 		if (tag == NULL)
 			return (ENOMEM);
-		if (!devfs_present) {
-			err = cdevsw_add(&tun_cdevsw);
-			if (err != 0) {
-				EVENTHANDLER_DEREGISTER(dev_clone, tag);
-				return (err);
-			}
+#ifdef NODEVFS
+		err = cdevsw_add(&tun_cdevsw);
+		if (err != 0) {
+			EVENTHANDLER_DEREGISTER(dev_clone, tag);
+			return (err);
 		}
+#endif
 		tununits.rm_type = RMAN_ARRAY;
 		tununits.rm_descr = "open if_tun units";
 		err = rman_init(&tununits);
@@ -200,8 +200,9 @@ tunmodevent(module_t mod, int type, void *data)
 		if (tunbasedev != NOUDEV)
 			destroy_dev(udev2dev(tunbasedev, 0));
 
-		if (!devfs_present)
-			cdevsw_remove(&tun_cdevsw);
+#ifdef NODEVFS
+		cdevsw_remove(&tun_cdevsw);
+#endif
 		break;
 	} 
 	return 0; 

sys/sys/conf.h

@@ -323,7 +323,6 @@ typedef void devfs_destroy_t(dev_t dev);
 
 extern devfs_create_t *devfs_create_hook;
 extern devfs_destroy_t *devfs_destroy_hook;
-extern int devfs_present;
 
 #define		UID_ROOT	0
 #define		UID_BIN		3

sys/sys/linedisc.h

@@ -323,7 +323,6 @@ typedef void devfs_destroy_t(dev_t dev);
 
 extern devfs_create_t *devfs_create_hook;
 extern devfs_destroy_t *devfs_destroy_hook;
-extern int devfs_present;
 
 #define		UID_ROOT	0
 #define		UID_BIN		3