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semaphore: use unlikely() for down's timeout 

Signed-off-by: liguang <lig.fnst@cn.fujitsu.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
liguang 2013-04-30 15:28:32 -07:00 committed by Linus Torvalds
parent 97439d0f84
commit c74f66ce10
1 changed files with 1 additions and 1 deletions
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2
kernel/semaphore.c
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@ -214,7 +214,7 @@ static inline int __sched __down_common(struct semaphore *sem, long state,
for (;;) { for (;;) {
if (signal_pending_state(state, task)) if (signal_pending_state(state, task))
goto interrupted; goto interrupted;
if (timeout <= 0) if (unlikely(timeout <= 0))
goto timed_out; goto timed_out;
__set_task_state(task, state); __set_task_state(task, state);
raw_spin_unlock_irq(&sem->lock); raw_spin_unlock_irq(&sem->lock);