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authorYury Norov2022-02-10 14:49:07 -0800
committerThomas Gleixner2022-04-10 22:30:04 +0200
commit8afbcaf8690dac19ebf570a4e4fef9c59c75bf8e (patch)
treebd7e580ff4b930bfef65210bc558775c9e7d36c7 /kernel/time
parentefaa0227f6c6a5073951b20cf2f8c63c4155306c (diff)
clocksource: Replace cpumask_weight() with cpumask_empty()
clocksource_verify_percpu() calls cpumask_weight() to check if any bit of a given cpumask is set. This can be done 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: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20220210224933.379149-24-yury.norov@gmail.com
Diffstat (limited to 'kernel/time')
-rw-r--r--kernel/time/clocksource.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
index 95d7ca35bdf2..cee5da1e54c4 100644
--- a/kernel/time/clocksource.c
+++ b/kernel/time/clocksource.c
@@ -343,7 +343,7 @@ void clocksource_verify_percpu(struct clocksource *cs)
cpus_read_lock();
preempt_disable();
clocksource_verify_choose_cpus();
- if (cpumask_weight(&cpus_chosen) == 0) {
+ if (cpumask_empty(&cpus_chosen)) {
preempt_enable();
cpus_read_unlock();
pr_warn("Not enough CPUs to check clocksource '%s'.\n", cs->name);