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clocksource: replace cpumask_weight with cpumask_empty in clocksource.c
clocksource_verify_percpu() 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>
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@ -343,7 +343,7 @@ void clocksource_verify_percpu(struct clocksource *cs)
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cpus_read_lock();
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preempt_disable();
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clocksource_verify_choose_cpus();
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if (cpumask_weight(&cpus_chosen) == 0) {
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if (cpumask_empty(&cpus_chosen)) {
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preempt_enable();
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cpus_read_unlock();
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pr_warn("Not enough CPUs to check clocksource '%s'.\n", cs->name);
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