xtensa: simplify xtensa_pmu_irq_handler (ee769ebb) · Commits · 戴 / test

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:

arch/xtensa/kernel/perf_event.c

+1 −3

Original line number	Diff line number	Diff line
		@@ -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;