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| author | liguang <lig.fnst@cn.fujitsu.com> | 2013-04-30 15:28:32 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-04-30 17:04:08 -0700 |
| commit | c74f66ce102e2cfb61c185f7451538e29de640b9 (patch) | |
| tree | 20ad92052a52f5cc080633d5a2e6a2e400d2f010 /kernel/semaphore.c | |
| parent | 97439d0f84942d3031545e80852dde09457136c6 (diff) | |
| download | lwn-c74f66ce102e2cfb61c185f7451538e29de640b9.tar.gz lwn-c74f66ce102e2cfb61c185f7451538e29de640b9.zip | |
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>
Diffstat (limited to 'kernel/semaphore.c')
| -rw-r--r-- | kernel/semaphore.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/semaphore.c b/kernel/semaphore.c index 4567fc020fe3..9c7017d1d996 100644 --- a/kernel/semaphore.c +++ b/kernel/semaphore.c @@ -214,7 +214,7 @@ static inline int __sched __down_common(struct semaphore *sem, long state, for (;;) { if (signal_pending_state(state, task)) goto interrupted; - if (timeout <= 0) + if (unlikely(timeout <= 0)) goto timed_out; __set_task_state(task, state); raw_spin_unlock_irq(&sem->lock); |