linux-kernel - [PATCH 3/5] rtmutex: use task->oncpu to save a call

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Message-ID: <20080520144925.15992.56716.stgit@novell1.haskins.net>
Date:	Tue, 20 May 2008 10:49:26 -0400
From:	Gregory Haskins <ghaskins@...ell.com>
To:	mingo@...e.hu, tglx@...utronix.de, rostedt@...dmis.org,
	linux-rt-users@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, sdietrich@...ell.com,
	pmorreale@...ell.com, mkohari@...ell.com, ghaskins@...ell.com
Subject: [PATCH 3/5] rtmutex: use task->oncpu to save a call

Signed-off-by: Gregory Haskins <ghaskins@...ell.com>
---

 kernel/rtmutex.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kernel/rtmutex.c b/kernel/rtmutex.c
index 8ae9de3..b6ff1eb 100644
--- a/kernel/rtmutex.c
+++ b/kernel/rtmutex.c
@@ -738,7 +738,7 @@ static int adaptive_wait(struct rt_mutex_waiter *waiter,
 		}
 
 		/* Owner went to bed, so should we */
-		if (!task_is_current(orig_owner)) {
+		if (!orig_owner->oncpu) {
 			sleep = 1;
 			rcu_read_unlock();
 			break;

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