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xtensa: simplify xtensa_pmu_irq_handler

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Use for_each_set_bit() instead of open-coding it to simplify the code.

Signed-off-by: Xu Wang <vulab@iscas.ac.cn>
Message-Id: <20200708062023.7986-1-vulab@iscas.ac.cn>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
This commit is contained in:
Xu Wang 2020-07-08 06:20:23 +00:00 committed by Max Filippov
parent 0d5ab14442
commit ee769ebbe9
1 changed files with 1 additions and 3 deletions
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4
arch/xtensa/kernel/perf_event.c
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@ -362,9 +362,7 @@ irqreturn_t xtensa_pmu_irq_handler(int irq, void *dev_id)
struct xtensa_pmu_events *ev = this_cpu_ptr(&xtensa_pmu_events);
unsigned i;
for (i = find_first_bit(ev->used_mask, XCHAL_NUM_PERF_COUNTERS);
i < XCHAL_NUM_PERF_COUNTERS;
i = find_next_bit(ev->used_mask, XCHAL_NUM_PERF_COUNTERS, i + 1)) {
for_each_set_bit(i, ev->used_mask, XCHAL_NUM_PERF_COUNTERS) {
uint32_t v = get_er(XTENSA_PMU_PMSTAT(i));
struct perf_event *event = ev->event[i];
struct hw_perf_event *hwc = &event->hw;