linux-kernel - [PATCH] sched: remove noop in next

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Date:	Sat, 21 May 2011 22:19:02 +0800
From:	Hillf Danton <dhillf@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Ingo Molnar <mingo@...e.hu>, Peter Zijlstra <peterz@...radead.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Mike Galbraith <efault@....de>,
	Yong Zhang <yong.zhang0@...il.com>
Subject: [PATCH] sched: remove noop in next_prio()

When computing the next priority for a given run-queue, the check for
RT priority of the task determined by the pick_next_highest_task_rt()
function could be removed, since only RT task is returned by the
function.

Signed-off-by: Hillf Danton <dhillf@...il.com>
---

--- a/kernel/sched_rt.c	2011-04-27 11:48:50.000000000 +0800
+++ b/kernel/sched_rt.c	2011-05-21 22:10:34.000000000 +0800
@@ -670,7 +670,7 @@ static inline int next_prio(struct rq *r
 {
 	struct task_struct *next = pick_next_highest_task_rt(rq, rq->cpu);

-	if (next && rt_prio(next->prio))
+	if (next)
 		return next->prio;
 	else
 		return MAX_RT_PRIO;
--
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