perf_ibs_enable_event  412 arch/x86/events/amd/ibs.c 	perf_ibs_enable_event(perf_ibs, hwc, period >> 4);
perf_ibs_enable_event  675 arch/x86/events/amd/ibs.c 		perf_ibs_enable_event(perf_ibs, hwc, period);