ref_system       2911 kernel/trace/trace_events_hist.c 	char *s, *ref_system = NULL, *ref_event = NULL, *ref_var = str;
ref_system       2920 kernel/trace/trace_events_hist.c 			ref_system = strsep(&str, ".");
ref_system       2934 kernel/trace/trace_events_hist.c 	s = local_field_var_ref(hist_data, ref_system, ref_event, ref_var);
ref_system       2936 kernel/trace/trace_events_hist.c 		hist_field = parse_var_ref(hist_data, ref_system,