149 	if (WARN_ON(!call->class))  in trace_define_field()
164 	if (WARN_ON(!call->class))  in trace_define_field_ext()
251 	struct trace_event_fields *field = call->class->fields_array;  in test_field()
534 						 call->class->probe,  in trace_event_reg()
538 					    call->class->probe,  in trace_event_reg()
545 						 call->class->perf_probe,  in trace_event_reg()
549 					    call->class->perf_probe,  in trace_event_reg()
652 			call->class->reg(call, TRACE_REG_UNREGISTER, file);  in __ftrace_event_enable_disable()
698 			ret = call->class->reg(call, TRACE_REG_REGISTER, file);  in __ftrace_event_enable_disable()
1031 		if (!name || !call->class || !call->class->reg)  in __ftrace_set_clr_event_nolock()
1039 		    strcmp(match, call->class->system) != 0)  in __ftrace_set_clr_event_nolock()
1042 		if (sub && strcmp(sub, call->class->system) != 0)  in __ftrace_set_clr_event_nolock()
1223 		if (call->class && call->class->reg &&  in t_next()
1286 	if (strcmp(call->class->system, TRACE_SYSTEM) != 0)  in t_show()
1287 		seq_printf(m, "%s:", call->class->system);  in t_show()
1453 		    !trace_event_name(call) || !call->class || !call->class->reg)  in system_enable_read()
1456 		if (system && strcmp(call->class->system, system->name) != 0)  in system_enable_read()
2388 		struct trace_event_fields *field = call->class->fields_array;  in event_define_fields()
2427 	if (strcmp(call->class->system, TRACE_SYSTEM) != 0) {  in event_create_dir()
2428 		d_events = event_subsystem_dir(tr, call->class->system, file, parent);  in event_create_dir()
2441 	if (call->class->reg && !(call->flags & TRACE_EVENT_FL_IGNORE_ENABLE))  in event_create_dir()
2446 	if (call->event.type && call->class->reg)  in event_create_dir()
2482 	if (call->event.type && call->class->reg)  in event_create_dir()
2547 	if (call->class->raw_init) {  in event_init()
2548 		ret = call->class->raw_init(call);  in event_init()
2753 		if (!last_system || call->class->system != last_system) {  in trace_event_eval_update()
2756 			last_system = call->class->system;  in trace_event_eval_update()
2770 			if (call->class->system == map[i]->system) {  in trace_event_eval_update()
3060 		if (!name || !call->class)  in __find_event_file()
3064 		    strcmp(system, call->class->system) == 0)  in __find_event_file()
3077 	if (!file || !file->event_call->class->reg ||  in find_event_file()
3254 		   edata->file->event_call->class->system,  in event_enable_print()
3924 		if (!call->class || !call->class->probe)  in event_trace_self_tests()
3934 		if (call->class->system &&  in event_trace_self_tests()
3935 		    strcmp(call->class->system, "syscalls") == 0)  in event_trace_self_tests()