linux-kernel - [PATCH 1/2] semaphore: give an unlikely for down's timeout

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Date:	Fri, 1 Mar 2013 17:03:47 +0800
From:	liguang <lig.fnst@...fujitsu.com>
To:	luciarosculete@...il.com, jkosina@...e.cz,
	linux-kernel@...r.kernel.org
Cc:	liguang <lig.fnst@...fujitsu.com>
Subject: [PATCH 1/2] semaphore: give an unlikely for down's timeout

Signed-off-by: liguang <lig.fnst@...fujitsu.com>
---
 kernel/semaphore.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kernel/semaphore.c b/kernel/semaphore.c
index 4567fc0..9c7017d 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);
-- 
1.7.2.5

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