linux-kernel - [PATCH] sched: cleanup pre_schedule

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Message-Id: <1265726639-21534-1-git-send-email-yong.zhang0@gmail.com>
Date:	Tue,  9 Feb 2010 22:43:59 +0800
From:	Yong Zhang <yong.zhang0@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...e.hu>,
	Rusty Russell <rusty@...tcorp.com.au>
Subject: [PATCH] sched: cleanup pre_schedule_rt

Since [commit 9a897c5a:
sched: RT-balance, replace hooks with pre/post schedule and wakeup methods]
we must call pre_schedule_rt if prev is rt task.
So condition rt_task(prev) is always true and the 'unlikely' declaration is
odd.

Signed-off-by: Yong Zhang <yong.zhang0@...il.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Rusty Russell <rusty@...tcorp.com.au>
---
 kernel/sched_rt.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
index f48328a..704b790 100644
--- a/kernel/sched_rt.c
+++ b/kernel/sched_rt.c
@@ -1459,7 +1459,7 @@ static int pull_rt_task(struct rq *this_rq)
 static void pre_schedule_rt(struct rq *rq, struct task_struct *prev)
 {
 	/* Try to pull RT tasks here if we lower this rq's prio */
-	if (unlikely(rt_task(prev)) && rq->rt.highest_prio.curr > prev->prio)
+	if (rq->rt.highest_prio.curr > prev->prio)
 		pull_rt_task(rq);
 }
 
-- 
1.6.3.3

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