From: Peter Zijlstra <peterz@infradead.org>
Date: Thu, 25 Feb 2016 14:01:49 +0000 (+0100)
Subject: sched/deadline: Remove superfluous call to switched_to_dl()
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=801ccdbf018ca5dbd478756ece55cd6c7726ed5b;p=openwrt%2Fstaging%2Fblogic.git

sched/deadline: Remove superfluous call to switched_to_dl()

	if (A || B) {

	} else if (A && !B) {

	}

If A we'll take the first branch, if !A we will not satisfy the second.
Therefore the second branch will never be taken.

Reported-by: luca abeni <luca.abeni@unitn.it>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Juri Lelli <juri.lelli@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20160225140149.GK6357@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---

diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index 04a569cdd613..15abf04bf0b8 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -1772,8 +1772,7 @@ static void prio_changed_dl(struct rq *rq, struct task_struct *p,
 		 */
 		resched_curr(rq);
 #endif /* CONFIG_SMP */
-	} else
-		switched_to_dl(rq, p);
+	}
 }
 
 const struct sched_class dl_sched_class = {