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authorYury Norov <yury.norov@gmail.com>2022-02-10 23:48:56 +0100
committerWill Deacon <will@kernel.org>2022-02-15 15:38:57 +0100
commit95ed57c73bbcffa02cbb1d61c19484c2ec6de094 (patch)
tree868ab4d1a7d99ade05dc3729f5dc705d10387d87 /drivers/perf/arm-cci.c
parentperf: Replace acpi_bus_get_device() (diff)
downloadlinux-95ed57c73bbcffa02cbb1d61c19484c2ec6de094.tar.xz
linux-95ed57c73bbcffa02cbb1d61c19484c2ec6de094.zip
perf: replace bitmap_weight with bitmap_empty where appropriate
In some places, drivers/perf code calls bitmap_weight() to check if any bit of a given bitmap is set. It's better to use bitmap_empty() in that case because bitmap_empty() stops traversing the bitmap as soon as it finds first set bit, while bitmap_weight() counts all bits unconditionally. Signed-off-by: Yury Norov <yury.norov@gmail.com> Acked-by: Mark Rutland <mark.rutland@arm.com> Link: https://lore.kernel.org/r/20220210224933.379149-13-yury.norov@gmail.com Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'drivers/perf/arm-cci.c')
-rw-r--r--drivers/perf/arm-cci.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/perf/arm-cci.c b/drivers/perf/arm-cci.c
index 54aca3a62814..96e09fa40909 100644
--- a/drivers/perf/arm-cci.c
+++ b/drivers/perf/arm-cci.c
@@ -1096,7 +1096,7 @@ static void cci_pmu_enable(struct pmu *pmu)
{
struct cci_pmu *cci_pmu = to_cci_pmu(pmu);
struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events;
- int enabled = bitmap_weight(hw_events->used_mask, cci_pmu->num_cntrs);
+ bool enabled = !bitmap_empty(hw_events->used_mask, cci_pmu->num_cntrs);
unsigned long flags;
if (!enabled)