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| author |   Yury Norov <yury.norov@gmail.com> | 2022-02-10 14:49:07 -0800 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2022-04-10 22:30:04 +0200 |
| commit | 8afbcaf8690dac19ebf570a4e4fef9c59c75bf8e (patch) | |
| tree | bd7e580ff4b930bfef65210bc558775c9e7d36c7 /kernel/time/clocksource.c | |
| parent | timers: Move timer sysctl into the timer code (diff) | |
| download | linux-dev-8afbcaf8690dac19ebf570a4e4fef9c59c75bf8e.tar.xz linux-dev-8afbcaf8690dac19ebf570a4e4fef9c59c75bf8e.zip | |
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/clocksource.c')
| -rw-r--r-- | kernel/time/clocksource.c | 2 |
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); |