Commit a37e94fe authored by Yury Norov's avatar Yury Norov
Browse files

drm/i915/pmu: replace cpumask_weight with cpumask_empty where appropriate 



i915_pmu_cpu_online() 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: default avatarYury Norov <yury.norov@gmail.com>
Reviewed-by: default avatarTvrtko Ursulin <tvrtko.ursulin@intel.com>
parent 4aec74bc

drivers/gpu/drm/i915/i915_pmu.c

+1 −1
Original line number Diff line number Diff line
@@ -1050,7 +1050,7 @@ static int i915_pmu_cpu_online(unsigned int cpu, struct hlist_node *node) 
	GEM_BUG_ON(!pmu->base.event_init);



	/* Select the first online CPU as a designated reader. */

	if (!cpumask_weight(&i915_pmu_cpumask))

	if (cpumask_empty(&i915_pmu_cpumask))

		cpumask_set_cpu(cpu, &i915_pmu_cpumask);



	return 0;