Messages in this thread Patch in this message | | | Date | Tue, 02 Mar 2021 09:01:53 -0000 | From | "tip-bot2 for Vincent Donnefort" <> | Subject | [tip: sched/core] sched/fair: use lsub_positive in cpu_util_next() |
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The following commit has been merged into the sched/core branch of tip:
Commit-ID: 4537b36ee8a290376174b297d6812cba1375ea79 Gitweb: https://git.kernel.org/tip/4537b36ee8a290376174b297d6812cba1375ea79 Author: Vincent Donnefort <vincent.donnefort@arm.com> AuthorDate: Thu, 25 Feb 2021 08:36:12 Committer: Peter Zijlstra <peterz@infradead.org> CommitterDate: Mon, 01 Mar 2021 18:17:25 +01:00
sched/fair: use lsub_positive in cpu_util_next()
The sub_positive local version is saving an explicit load-store and is enough for the cpu_util_next() usage.
Signed-off-by: Vincent Donnefort <vincent.donnefort@arm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Quentin Perret <qperret@google.com> Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com> Link: https://lkml.kernel.org/r/20210225083612.1113823-3-vincent.donnefort@arm.com --- 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 b994db9..7b2fac0 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -6471,7 +6471,7 @@ static unsigned long cpu_util_next(int cpu, struct task_struct *p, int dst_cpu) * util_avg should already be correct. */ if (task_cpu(p) == cpu && dst_cpu != cpu) - sub_positive(&util, task_util(p)); + lsub_positive(&util, task_util(p)); else if (task_cpu(p) != cpu && dst_cpu == cpu) util += task_util(p);
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