From: Shawn Bohrer <sbohrer@rgmadvisors.com>
Date: Fri, 4 Oct 2013 19:24:53 +0000 (-0500)
Subject: sched/rt: Remove redundant nr_cpus_allowed test
X-Git-Tag: submit/tizen_common/20140905.094502~448
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4aef0b11ba4fa4c2cd115c312dd9f0b64cad1bf1;p=sdk%2Femulator%2Femulator-kernel.git

sched/rt: Remove redundant nr_cpus_allowed test

commit 6bfa687c19b7ab8adee03f0d43c197c2945dd869 upstream.

In 76854c7e8f3f4172fef091e78d88b3b751463ac6 ("sched: Use
rt.nr_cpus_allowed to recover select_task_rq() cycles") an
optimization was added to select_task_rq_rt() that immediately
returns when p->nr_cpus_allowed == 1 at the beginning of the
function.

This makes the latter p->nr_cpus_allowed > 1 check redundant,
which can now be removed.

Signed-off-by: Shawn Bohrer <sbohrer@rgmadvisors.com>
Reviewed-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Mike Galbraith <mgalbraith@suse.de>
Cc: tomk@rgmadvisors.com
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1380914693-24634-1-git-send-email-shawn.bohrer@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---

diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c
index 0c7886ff263e..ff04e1a06412 100644
--- a/kernel/sched/rt.c
+++ b/kernel/sched/rt.c
@@ -1229,8 +1229,7 @@ select_task_rq_rt(struct task_struct *p, int sd_flag, int flags)
 	 */
 	if (curr && unlikely(rt_task(curr)) &&
 	    (curr->nr_cpus_allowed < 2 ||
-	     curr->prio <= p->prio) &&
-	    (p->nr_cpus_allowed > 1)) {
+	     curr->prio <= p->prio)) {
 		int target = find_lowest_rq(p);
 
 		if (target != -1)