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

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Message-ID: <BANLkTin1QYAx7as41t78-n0giLSBWoToVA@mail.gmail.com>
Date:	Thu, 26 May 2011 21:08:56 +0800
From:	Hillf Danton <dhillf@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	Mike Galbraith <efault@....de>,
	Yong Zhang <yong.zhang0@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: [PATCH] sched: remove noop in pre_schedule_rt()

Checking task to be RT is removed since only RT task is served here.

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

--- tip-git/kernel/sched_rt.c	Sun May 22 20:12:01 2011
+++ sched_rt.c	Thu May 26 21:11:19 2011
@@ -1516,7 +1516,7 @@ skip:
 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);
 }
--
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