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5db078a9be
freebsd-dev/sys/alpha/include
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John Baldwin 5db078a9be Fix mtx_legal2block. The only time that it is bad to block on a mutex is 
if we hold a spin mutex, since we can trivially get into deadlocks if we
start switching out of processes that hold spinlocks.  Checking to see if
interrupts were disabled was a sort of cheap way of doing this since most
of the time interrupts were only disabled when holding a spin lock.  At
least on the i386.  To fix this properly, use a per-process counter
p_spinlocks that counts the number of spin locks currently held, and
instead of checking to see if interrupts are disabled in the witness code,
check to see if we hold any spin locks.  Since child processes always
start up with the sched lock magically held in fork_exit(), we initialize
p_spinlocks to 1 for child processes.  Note that proc0 doesn't go through
fork_exit(), so it starts with no spin locks held.

Consulting from:	cp
2001-03-09 07:24:17 +00:00
..
pc Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL" 1999-12-29 04:46:21 +00:00
_limits.h Move all VCS ids to a consistent location. 2000-12-28 18:21:32 +00:00
alpha_cpu.h Implement inline assembler wrappers for PALcode calls and for alpha 1999-11-29 19:57:51 +00:00
ansi.h Correct disordering which is corresponding to bde's fix to 2001-02-17 14:51:11 +00:00
asm.h Fix problems booting large kernels on alphas. The symptom is that the kernel 2000-10-16 20:15:43 +00:00
atomic.h Only use 1 set of memory barrier operations with the atomic_*_{acq,rel}_ptr 2000-10-25 00:15:21 +00:00
bootinfo.h $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
bus_memio.h $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
bus_pio.h $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
bus.h The alpha architecture is 64 bits, so bus_addr_t && bus_size_t should really 2001-01-09 18:17:48 +00:00
bwx.h * Completely rewrite the alpha busspace to hide the implementation from 2000-08-28 21:48:13 +00:00
chipset.h * Completely rewrite the alpha busspace to hide the implementation from 2000-08-28 21:48:13 +00:00
clock.h Move DELAY() from <machine/clock.h> to <sys/systm.h> 2000-10-15 09:51:49 +00:00
clockvar.h Add $FreeBSD$ 2000-05-01 20:32:07 +00:00
cpu.h Rename switch_trampoline() to fork_trampoline() on the alpha and ia64. 2001-02-22 16:56:53 +00:00
cpuconf.h Next phase in the PCI subsystem cleanup. 2000-12-08 22:11:23 +00:00
cpufunc.h Major update to the way synchronization is done in the kernel. Highlights 2000-09-07 01:33:02 +00:00
db_machdep.h Add $FreeBSD$ 2000-05-01 20:32:07 +00:00
elf.h Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL" 1999-12-29 04:46:21 +00:00
endian.h $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
exec.h Add $FreeBSD$ 2000-05-01 20:32:07 +00:00
float.h $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
floatingpoint.h Add $FreeBSD$ 2000-05-01 20:32:07 +00:00
fpu.h Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL" 1999-12-29 04:46:21 +00:00
frame.h * Move exception_return to exception.s which is a more logical home for it. 2001-02-02 10:20:30 +00:00
globaldata.h - Make astpending and need_resched process attributes rather than CPU 2001-02-10 02:20:34 +00:00
globals.h - Remove compatibility macros for accessing per-cpu variables. 2001-01-11 14:46:26 +00:00
ieee.h $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
ieeefp.h Finish moving all IEEE fp types to be the same on all arch's. 2000-05-10 19:41:40 +00:00
in_cksum.h Make in_cksum() a macro call to in_cksum_skip(), since it provides the 2000-05-06 18:18:32 +00:00
inst.h $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
intr.h Use the MI ithread helper functions in the alpha hardware interrupt code. 2001-02-09 17:53:23 +00:00
intrcnt.h Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL" 1999-12-29 04:46:21 +00:00
ioctl_bt848.h Merge from i386: Add MSP ioctl 2000-10-27 07:07:24 +00:00
ioctl_fd.h Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL" 1999-12-29 04:46:21 +00:00
ioctl_meteor.h Add include files to alpha/include directory. 2000-04-15 08:07:56 +00:00
ipl.h Wrap the IPI definitions and function prototypes in #ifdef SMP. 2001-01-24 10:25:09 +00:00
limits.h Move all VCS ids to a consistent location. 2000-12-28 18:21:32 +00:00
md_var.h Next phase in the PCI subsystem cleanup. 2000-12-08 22:11:23 +00:00
mutex.h Fix mtx_legal2block. The only time that it is bad to block on a mutex is 2001-03-09 07:24:17 +00:00
pal.h $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
param.h Fix CMSG and ALIGN macro usage. 2000-11-08 16:59:25 +00:00
pcb.h - Don't call clear_resched() in userret(), instead, clear the resched flag 2001-02-20 05:26:15 +00:00
pcpu.h - Make astpending and need_resched process attributes rather than CPU 2001-02-10 02:20:34 +00:00
pmap.h Move MAXCPU from machine/smp.h to machine/param.h to fix breakage 2000-09-23 12:18:06 +00:00
proc.h Major update to the way synchronization is done in the kernel. Highlights 2000-09-07 01:33:02 +00:00
profile.h Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL" 1999-12-29 04:46:21 +00:00
prom.h Alpha 8200: Add prototype from promcnattach. 2000-03-18 08:00:51 +00:00
psl.h $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
pte.h Zap some latent problems hidden by differences between KERNEL and _KERNEL. 1999-11-22 15:14:56 +00:00
ptrace.h Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL" 1999-12-29 04:46:21 +00:00
reg.h Remove offensive language. 2000-06-25 09:30:53 +00:00
reloc.h Add $FreeBSD$ 2000-05-01 20:32:07 +00:00
resource.h * Implement bus_set/get/delete_resource for pci. 1999-10-14 21:38:33 +00:00
rpb.h Major update to the way synchronization is done in the kernel. Highlights 2000-09-07 01:33:02 +00:00
setjmp.h Work around a bug by adding struct tags. gcc-2.95 apparently gets the 2000-10-06 11:53:32 +00:00
sgmap.h $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
sigframe.h sigset_t change (part 3 of 5) 1999-09-29 15:06:27 +00:00
signal.h Make MINSIGSTKSZ machine dependent, and have the sigaltstack 2000-11-09 08:25:48 +00:00
smp.h Catch up to moving headers: 2000-10-20 07:58:15 +00:00
stdarg.h $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
swiz.h * Completely rewrite the alpha busspace to hide the implementation from 2000-08-28 21:48:13 +00:00
sysarch.h The kernel side of per-process unaligned access control (printing, fixing & 2000-01-16 07:07:33 +00:00
types.h - Remove the inthand2_t type and use the equivalent driver_intr_t type from 2000-09-13 18:33:25 +00:00
ucontext.h Don't include <machine/frame.h>. 1999-10-08 09:09:13 +00:00
varargs.h $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
vmparam.h Make sysv-style shared memory tuneable params fully runtime adjustable 2000-03-30 07:17:05 +00:00