ftrace_event_open 1795 kernel/trace/trace_events.c 	return ftrace_event_open(inode, file, seq_ops);
ftrace_event_open 1813 kernel/trace/trace_events.c 	ret = ftrace_event_open(inode, file, seq_ops);
ftrace_event_open 1834 kernel/trace/trace_events.c 	ret = ftrace_event_open(inode, file, seq_ops);