bts_event 928 arch/x86/events/perf_event.h unsigned int hw_event, bts_event; bts_event 934 arch/x86/events/perf_event.h bts_event = x86_pmu.event_map(PERF_COUNT_HW_BRANCH_INSTRUCTIONS); bts_event 936 arch/x86/events/perf_event.h return hw_event == bts_event && period == 1;