static void alpha_pmu_stop()

in kernel/perf_event.c [532:549]

• 15 lines of code
• 5 McCabe index (conditional complexity)

static void alpha_pmu_stop(struct perf_event *event, int flags)
{
	struct hw_perf_event *hwc = &event->hw;
	struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);

	if (!(hwc->state & PERF_HES_STOPPED)) {
		cpuc->idx_mask &= ~(1UL<<hwc->idx);
		hwc->state |= PERF_HES_STOPPED;
	}

	if ((flags & PERF_EF_UPDATE) && !(hwc->state & PERF_HES_UPTODATE)) {
		alpha_perf_event_update(event, hwc, hwc->idx, 0);
		hwc->state |= PERF_HES_UPTODATE;
	}

	if (cpuc->enabled)
		wrperfmon(PERFMON_CMD_DISABLE, (1UL<<hwc->idx));
}