5822 				 struct perf_event *output_event);
5868 			struct perf_event *output_event;  in _perf_ioctl()  local
5873 			output_event = output.file->private_data;  in _perf_ioctl()
5874 			ret = perf_event_set_output(event, output_event);  in _perf_ioctl()
12190 perf_event_set_output(struct perf_event *event, struct perf_event *output_event)  in perf_event_set_output()  argument
12195 	if (!output_event) {  in perf_event_set_output()
12201 	if (event == output_event)  in perf_event_set_output()
12207 	if (output_event->cpu != event->cpu)  in perf_event_set_output()
12213 	if (output_event->cpu == -1 && output_event->hw.target != event->hw.target)  in perf_event_set_output()
12219 	if (output_event->clock != event->clock)  in perf_event_set_output()
12226 	if (is_write_backward(output_event) != is_write_backward(event))  in perf_event_set_output()
12232 	if (has_aux(event) && has_aux(output_event) &&  in perf_event_set_output()
12233 	    event->pmu != output_event->pmu)  in perf_event_set_output()
12243 	mutex_lock_double(&event->mmap_mutex, &output_event->mmap_mutex);  in perf_event_set_output()
12249 	if (output_event) {  in perf_event_set_output()
12251 		rb = ring_buffer_get(output_event);  in perf_event_set_output()
12267 	if (output_event)  in perf_event_set_output()
12268 		mutex_unlock(&output_event->mmap_mutex);  in perf_event_set_output()
12355 	struct perf_event *group_leader = NULL, *output_event = NULL;  in SYSCALL_DEFINE5()  local
12438 			output_event = group_leader;  in SYSCALL_DEFINE5()
12612 	if (output_event) {  in SYSCALL_DEFINE5()
12613 		err = perf_event_set_output(event, output_event);  in SYSCALL_DEFINE5()