tm_ref           2256 kernel/trace/trace_events.c 	atomic_set(&file->tm_ref, 0);
tm_ref            447 kernel/trace/trace_events_trigger.c 		if (atomic_inc_return(&file->tm_ref) > 1)
tm_ref            452 kernel/trace/trace_events_trigger.c 		if (atomic_dec_return(&file->tm_ref) > 0)