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sched/fair: use lsub_positive in cpu_util_next()

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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>
Signed-off-by: Ingo Molnar <mingo@kernel.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
This commit is contained in:
Vincent Donnefort 2021-02-25 08:36:12 +00:00 committed by Ingo Molnar
parent 0372e1cf70
commit 736cc6b311
1 changed files with 1 additions and 1 deletions
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2
kernel/sched/fair.c
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@ -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);