Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751509Ab3CAJLS (ORCPT ); Fri, 1 Mar 2013 04:11:18 -0500 Received: from cn.fujitsu.com ([222.73.24.84]:2446 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1750799Ab3CAJLQ (ORCPT ); Fri, 1 Mar 2013 04:11:16 -0500 X-IronPort-AV: E=Sophos;i="4.84,760,1355068800"; d="scan'208";a="6793627" From: liguang To: luciarosculete@gmail.com, jkosina@suse.cz, linux-kernel@vger.kernel.org Cc: liguang Subject: [PATCH 1/2] semaphore: give an unlikely for down's timeout Date: Fri, 1 Mar 2013 17:03:47 +0800 Message-Id: <1362128628-18457-1-git-send-email-lig.fnst@cn.fujitsu.com> X-Mailer: git-send-email 1.7.2.5 X-MIMETrack: Itemize by SMTP Server on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2013/03/01 17:03:18, Serialize by Router on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2013/03/01 17:03:20, Serialize complete at 2013/03/01 17:03:20 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 839 Lines: 26 Signed-off-by: liguang --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/