28 static void nmi_timer_callback(struct perf_event *event,  in nmi_timer_callback()  argument
32 	event->hw.interrupts = 0;       /* don't throttle interrupts */  in nmi_timer_callback()
38 	struct perf_event *event = per_cpu(nmi_timer_events, cpu);  in nmi_timer_start_cpu()  local
40 	if (!event) {  in nmi_timer_start_cpu()
41 		event = perf_event_create_kernel_counter(&nmi_timer_attr, cpu, NULL,  in nmi_timer_start_cpu()
43 		if (IS_ERR(event))  in nmi_timer_start_cpu()
44 			return PTR_ERR(event);  in nmi_timer_start_cpu()
45 		per_cpu(nmi_timer_events, cpu) = event;  in nmi_timer_start_cpu()
48 	if (event && ctr_running)  in nmi_timer_start_cpu()
49 		perf_event_enable(event);  in nmi_timer_start_cpu()
56 	struct perf_event *event = per_cpu(nmi_timer_events, cpu);  in nmi_timer_stop_cpu()  local
58 	if (event && ctr_running)  in nmi_timer_stop_cpu()
59 		perf_event_disable(event);  in nmi_timer_stop_cpu()
108 	struct perf_event *event;  in nmi_timer_shutdown()  local
114 		event = per_cpu(nmi_timer_events, cpu);  in nmi_timer_shutdown()
115 		if (!event)  in nmi_timer_shutdown()
117 		perf_event_disable(event);  in nmi_timer_shutdown()
119 		perf_event_release_kernel(event);  in nmi_timer_shutdown()