452 static void __get_system_dir(struct ftrace_subsystem_dir *dir)  in __get_system_dir()  argument
454 	WARN_ON_ONCE(dir->ref_count == 0);  in __get_system_dir()
455 	dir->ref_count++;  in __get_system_dir()
456 	__get_system(dir->subsystem);  in __get_system_dir()
459 static void __put_system_dir(struct ftrace_subsystem_dir *dir)  in __put_system_dir()  argument
461 	WARN_ON_ONCE(dir->ref_count == 0);  in __put_system_dir()
463 	WARN_ON_ONCE(system_refcount(dir->subsystem) == 1 && dir->ref_count != 1);  in __put_system_dir()
465 	__put_system(dir->subsystem);  in __put_system_dir()
466 	if (!--dir->ref_count)  in __put_system_dir()
467 		kfree(dir);  in __put_system_dir()
470 static void put_system(struct ftrace_subsystem_dir *dir)  in put_system()  argument
473 	__put_system_dir(dir);  in put_system()
477 static void remove_subsystem(struct ftrace_subsystem_dir *dir)  in remove_subsystem()  argument
479 	if (!dir)  in remove_subsystem()
482 	if (!--dir->nr_events) {  in remove_subsystem()
483 		tracefs_remove_recursive(dir->entry);  in remove_subsystem()
484 		list_del(&dir->list);  in remove_subsystem()
485 		__put_system_dir(dir);  in remove_subsystem()
491 	struct dentry *dir = file->dir;  in remove_event_file_dir()  local
494 	if (dir) {  in remove_event_file_dir()
495 		spin_lock(&dir->d_lock);	/* probably unneeded */  in remove_event_file_dir()
496 		list_for_each_entry(child, &dir->d_subdirs, d_child) {  in remove_event_file_dir()
500 		spin_unlock(&dir->d_lock);  in remove_event_file_dir()
502 		tracefs_remove_recursive(dir);  in remove_event_file_dir()
832 	struct ftrace_subsystem_dir *dir = filp->private_data;  in system_enable_read()  local
833 	struct event_subsystem *system = dir->subsystem;  in system_enable_read()
836 	struct trace_array *tr = dir->tr;  in system_enable_read()
877 	struct ftrace_subsystem_dir *dir = filp->private_data;  in system_enable_write()  local
878 	struct event_subsystem *system = dir->subsystem;  in system_enable_write()
901 	ret = __ftrace_set_clr_event(dir->tr, NULL, name, NULL, val);  in system_enable_write()
1136 	struct ftrace_subsystem_dir *dir = NULL; /* Initialize for gcc */  in subsystem_open()  local
1147 		list_for_each_entry(dir, &tr->systems, list) {  in subsystem_open()
1148 			if (dir == inode->i_private) {  in subsystem_open()
1150 				if (dir->nr_events) {  in subsystem_open()
1151 					__get_system_dir(dir);  in subsystem_open()
1152 					system = dir->subsystem;  in subsystem_open()
1166 	WARN_ON(!dir);  in subsystem_open()
1170 		put_system(dir);  in subsystem_open()
1177 		put_system(dir);  in subsystem_open()
1185 	struct ftrace_subsystem_dir *dir;  in system_tr_open()  local
1196 	dir = kzalloc(sizeof(*dir), GFP_KERNEL);  in system_tr_open()
1197 	if (!dir) {  in system_tr_open()
1202 	dir->tr = tr;  in system_tr_open()
1207 		kfree(dir);  in system_tr_open()
1211 	filp->private_data = dir;  in system_tr_open()
1218 	struct ftrace_subsystem_dir *dir = file->private_data;  in subsystem_release()  local
1220 	trace_array_put(dir->tr);  in subsystem_release()
1227 	if (dir->subsystem)  in subsystem_release()
1228 		put_system(dir);  in subsystem_release()
1230 		kfree(dir);  in subsystem_release()
1239 	struct ftrace_subsystem_dir *dir = filp->private_data;  in subsystem_filter_read()  local
1240 	struct event_subsystem *system = dir->subsystem;  in subsystem_filter_read()
1266 	struct ftrace_subsystem_dir *dir = filp->private_data;  in subsystem_filter_write()  local
1283 	err = apply_subsystem_event_filter(dir, buf);  in subsystem_filter_write()
1503 	struct ftrace_subsystem_dir *dir;  in event_subsystem_dir()  local
1508 	list_for_each_entry(dir, &tr->systems, list) {  in event_subsystem_dir()
1509 		system = dir->subsystem;  in event_subsystem_dir()
1511 			dir->nr_events++;  in event_subsystem_dir()
1512 			file->system = dir;  in event_subsystem_dir()
1513 			return dir->entry;  in event_subsystem_dir()
1526 	dir = kmalloc(sizeof(*dir), GFP_KERNEL);  in event_subsystem_dir()
1527 	if (!dir)  in event_subsystem_dir()
1537 	dir->entry = tracefs_create_dir(name, parent);  in event_subsystem_dir()
1538 	if (!dir->entry) {  in event_subsystem_dir()
1544 	dir->tr = tr;  in event_subsystem_dir()
1545 	dir->ref_count = 1;  in event_subsystem_dir()
1546 	dir->nr_events = 1;  in event_subsystem_dir()
1547 	dir->subsystem = system;  in event_subsystem_dir()
1548 	file->system = dir;  in event_subsystem_dir()
1550 	entry = tracefs_create_file("filter", 0644, dir->entry, dir,  in event_subsystem_dir()
1558 	trace_create_file("enable", 0644, dir->entry, dir,  in event_subsystem_dir()
1561 	list_add(&dir->list, &tr->systems);  in event_subsystem_dir()
1563 	return dir->entry;  in event_subsystem_dir()
1566 	kfree(dir);  in event_subsystem_dir()
1569 	if (!dir || !system)  in event_subsystem_dir()
1596 	file->dir = tracefs_create_dir(name, d_events);  in event_create_dir()
1597 	if (!file->dir) {  in event_create_dir()
1603 		trace_create_file("enable", 0644, file->dir, file,  in event_create_dir()
1608 		trace_create_file("id", 0444, file->dir,  in event_create_dir()
1626 	trace_create_file("filter", 0644, file->dir, file,  in event_create_dir()
1634 		trace_create_file("trigger", 0644, file->dir, file,  in event_create_dir()
1637 	trace_create_file("format", 0444, file->dir, call,  in event_create_dir()
2763 	struct ftrace_subsystem_dir *dir;  in event_trace_self_tests()  local
2819 	list_for_each_entry(dir, &tr->systems, list) {  in event_trace_self_tests()
2821 		system = dir->subsystem;  in event_trace_self_tests()