ref_var          2911 kernel/trace/trace_events_hist.c 	char *s, *ref_system = NULL, *ref_event = NULL, *ref_var = str;
ref_var          2930 kernel/trace/trace_events_hist.c 			ref_var = str;
ref_var          2934 kernel/trace/trace_events_hist.c 	s = local_field_var_ref(hist_data, ref_system, ref_event, ref_var);
ref_var          2937 kernel/trace/trace_events_hist.c 					   ref_event, ref_var);