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| author | Yury Norov <yury.norov@gmail.com> | 2022-01-23 10:38:48 -0800 |
|---|---|---|
| committer | Yury Norov <yury.norov@gmail.com> | 2022-06-03 06:52:57 -0700 |
| commit | a37e94fe7c428ff4663f22966e142e7610ed049d (patch) | |
| tree | 63749fad647f426a7b900a800f5a6c170172d6b5 /drivers | |
| parent | 4aec74bccf5d047347bdfef3638e3031dd75c0a0 (diff) | |
| download | lwn-a37e94fe7c428ff4663f22966e142e7610ed049d.tar.gz lwn-a37e94fe7c428ff4663f22966e142e7610ed049d.zip | |
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: Yury Norov <yury.norov@gmail.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_pmu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_pmu.c b/drivers/gpu/drm/i915/i915_pmu.c index cfc21042499d..7299ed9937dd 100644 --- a/drivers/gpu/drm/i915/i915_pmu.c +++ b/drivers/gpu/drm/i915/i915_pmu.c @@ -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; |