static inline u32 nds32_pmu_read_counter()

in kernel/perf_event_cpu.c [495:522]

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

static inline u32 nds32_pmu_read_counter(struct perf_event *event)
{
	struct nds32_pmu *cpu_pmu = to_nds32_pmu(event->pmu);
	struct hw_perf_event *hwc = &event->hw;
	int idx = hwc->idx;
	u32 count = 0;

	if (!nds32_pfm_counter_valid(cpu_pmu, idx)) {
		pr_err("CPU reading wrong counter %d\n", idx);
	} else {
		switch (idx) {
		case PFMC0:
			count = __nds32__mfsr(NDS32_SR_PFMC0);
			break;
		case PFMC1:
			count = __nds32__mfsr(NDS32_SR_PFMC1);
			break;
		case PFMC2:
			count = __nds32__mfsr(NDS32_SR_PFMC2);
			break;
		default:
			pr_err
			    ("%s: CPU has no performance counters %d\n",
			     __func__, idx);
		}
	}
	return count;
}