From: Yury Norov (NVIDIA) Date: Tue, 16 Dec 2025 01:20:03 +0000 (-0500) Subject: drivers: perf: use bitmap_empty() where appropriate X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0c7c64146f707ffe7abd5d11c9828d8129903ab5;p=thirdparty%2Flinux.git drivers: perf: use bitmap_empty() where appropriate bitmap_empty() is more verbose and efficient, as it stops traversing bitmaps as soon as the 1st set bit found. Switch perf code to using bitmap_empty() where appropriate, and correspondingly use boolean types. Signed-off-by: Yury Norov (NVIDIA) Signed-off-by: Will Deacon --- diff --git a/drivers/perf/riscv_pmu_sbi.c b/drivers/perf/riscv_pmu_sbi.c index 7dd282da67cef..9dcc22fd48ef8 100644 --- a/drivers/perf/riscv_pmu_sbi.c +++ b/drivers/perf/riscv_pmu_sbi.c @@ -1244,7 +1244,7 @@ static int riscv_pm_pmu_notify(struct notifier_block *b, unsigned long cmd, { struct riscv_pmu *rvpmu = container_of(b, struct riscv_pmu, riscv_pm_nb); struct cpu_hw_events *cpuc = this_cpu_ptr(rvpmu->hw_events); - int enabled = bitmap_weight(cpuc->used_hw_ctrs, RISCV_MAX_COUNTERS); + bool enabled = !bitmap_empty(cpuc->used_hw_ctrs, RISCV_MAX_COUNTERS); struct perf_event *event; int idx; diff --git a/drivers/perf/starfive_starlink_pmu.c b/drivers/perf/starfive_starlink_pmu.c index 5e5a672b42294..964897c2baa91 100644 --- a/drivers/perf/starfive_starlink_pmu.c +++ b/drivers/perf/starfive_starlink_pmu.c @@ -450,8 +450,7 @@ static int starlink_pmu_pm_notify(struct notifier_block *b, starlink_pmu_pm_nb); struct starlink_hw_events *hw_events = this_cpu_ptr(starlink_pmu->hw_events); - int enabled = bitmap_weight(hw_events->used_mask, - STARLINK_PMU_MAX_COUNTERS); + bool enabled = !bitmap_empty(hw_events->used_mask, STARLINK_PMU_MAX_COUNTERS); struct perf_event *event; int idx;