From 1087ad4e3f88c474b8134a482720782922bf3fdf Mon Sep 17 00:00:00 2001 From: Yury Norov Date: Thu, 10 Feb 2022 14:49:06 -0800 Subject: sched: replace cpumask_weight with cpumask_empty where appropriate In some places, kernel/sched code calls cpumask_weight() to check if any bit of a given cpumask is set. We can do it more efficiently with cpumask_empty() because cpumask_empty() stops traversing the cpumask as soon as it finds first set bit, while cpumask_weight() counts all bits unconditionally. Signed-off-by: Yury Norov Signed-off-by: Peter Zijlstra (Intel) Link: https://lkml.kernel.org/r/20220210224933.379149-23-yury.norov@gmail.com --- kernel/sched/topology.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'kernel/sched/topology.c') diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c index e6cd55951304..1c84b48def20 100644 --- a/kernel/sched/topology.c +++ b/kernel/sched/topology.c @@ -74,7 +74,7 @@ static int sched_domain_debug_one(struct sched_domain *sd, int cpu, int level, break; } - if (!cpumask_weight(sched_group_span(group))) { + if (cpumask_empty(sched_group_span(group))) { printk(KERN_CONT "\n"); printk(KERN_ERR "ERROR: empty group\n"); break; -- cgit v1.2.3