[tip:sched/core] sched/fair: Remove unnecessary comparison with -1

[tip-bot for Brendan Jackman]

Commit-ID:  e90381eaecf6d59c60fe396838e0e99789531419
Gitweb:     https://git.kernel.org/tip/e90381eaecf6d59c60fe396838e0e99789531419
Author:     Brendan Jackman <brendan.jackman@xxxxxxx>
AuthorDate: Thu, 5 Oct 2017 12:45:13 +0100
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Tue, 10 Oct 2017 11:45:34 +0200

sched/fair: Remove unnecessary comparison with -1

Since commit:

  83a0a96a5f26 ("sched/fair: Leverage the idle state info when choosing the "idlest" cpu")

find_idlest_group_cpu() (formerly find_idlest_cpu) no longer returns -1,
so we can simplify the checking of the return value in find_idlest_cpu().

Signed-off-by: Brendan Jackman <brendan.jackman@xxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Reviewed-by: Josef Bacik <jbacik@xxxxxx>
Reviewed-by: Vincent Guittot <vincent.guittot@xxxxxxxxxx>
Cc: Dietmar Eggemann <dietmar.eggemann@xxxxxxx>
Cc: Josef Bacik <josef@xxxxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Mike Galbraith <efault@xxxxxx>
Cc: Morten Rasmussen <morten.rasmussen@xxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/20171005114516.18617-3-brendan.jackman@xxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 kernel/sched/fair.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index dd4f253..bdd28fb 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -5933,7 +5933,7 @@ static inline int find_idlest_cpu(struct sched_domain *sd, struct task_struct *p
 		}
 
 		new_cpu = find_idlest_group_cpu(group, p, cpu);
-		if (new_cpu == -1 || new_cpu == cpu) {
+		if (new_cpu == cpu) {
 			/* Now try balancing at a lower domain level of cpu */
 			sd = sd->child;
 			continue;