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authorYury Norov <yury.norov@gmail.com>2022-02-10 14:49:06 -0800
committerPeter Zijlstra <peterz@infradead.org>2022-02-16 15:57:53 +0100
commit1087ad4e3f88c474b8134a482720782922bf3fdf (patch)
tree93a95570454dd39c349d0e99bf1aab4408e6e218 /kernel/sched/topology.c
parent3624ba7b5e2acc02b01301ea5fd3534971eb9896 (diff)
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 <yury.norov@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20220210224933.379149-23-yury.norov@gmail.com
Diffstat (limited to 'kernel/sched/topology.c')
-rw-r--r--kernel/sched/topology.c2
1 files changed, 1 insertions, 1 deletions
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;