kernel-ark/kernel
Samuel Thibault 10f02d1c59 [PATCH] spin_unlock_bh() and preempt_check_resched()
In _spin_unlock_bh(lock):
	do { \
		_raw_spin_unlock(lock); \
		preempt_enable(); \
		local_bh_enable(); \
		__release(lock); \
	} while (0)

there is no reason for using preempt_enable() instead of a simple
preempt_enable_no_resched()

Since we know bottom halves are disabled, preempt_schedule() will always
return at once (preempt_count!=0), and hence preempt_check_resched() is
useless here...

This fixes it by using "preempt_enable_no_resched()" instead of the
"preempt_enable()", and thus avoids the useless preempt_check_resched()
just before re-enabling bottom halves.

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-21 10:46:48 -07:00
..
irq
power
acct.c
audit.c
auditsc.c
capability.c
compat.c
configs.c
cpu.c
cpuset.c
dma.c
exec_domain.c
exit.c
extable.c
fork.c
futex.c
intermodule.c
itimer.c
kallsyms.c
kfifo.c
kmod.c
kprobes.c
ksysfs.c
kthread.c
Makefile
module.c
panic.c
params.c
pid.c
posix-cpu-timers.c
posix-timers.c
printk.c
profile.c
ptrace.c
rcupdate.c
resource.c
sched.c
seccomp.c
signal.c
softirq.c
spinlock.c [PATCH] spin_unlock_bh() and preempt_check_resched() 2005-05-21 10:46:48 -07:00
stop_machine.c
sys_ni.c
sys.c
sysctl.c
time.c
timer.c
uid16.c
user.c
wait.c
workqueue.c