770 	struct mem_cgroup_reclaim_iter *uninitialized_var(iter);  in mem_cgroup_iter()
796 		iter = &mz->iter[reclaim->priority];  in mem_cgroup_iter()
798 		if (prev && reclaim->generation != iter->generation)  in mem_cgroup_iter()
802 			pos = READ_ONCE(iter->position);  in mem_cgroup_iter()
813 			(void)cmpxchg(&iter->position, pos, NULL);  in mem_cgroup_iter()
856 		(void)cmpxchg(&iter->position, pos, memcg);  in mem_cgroup_iter()
862 			iter->generation++;  in mem_cgroup_iter()
864 			reclaim->generation = iter->generation;  in mem_cgroup_iter()
893 	struct mem_cgroup_reclaim_iter *iter;  in invalidate_reclaim_iterators()  local
902 				iter = &mz->iter[i];  in invalidate_reclaim_iterators()
903 				cmpxchg(&iter->position,  in invalidate_reclaim_iterators()
915 #define for_each_mem_cgroup_tree(iter, root)		\  argument
916 	for (iter = mem_cgroup_iter(root, NULL, NULL);	\
917 	     iter != NULL;				\
918 	     iter = mem_cgroup_iter(root, iter, NULL))
920 #define for_each_mem_cgroup(iter)			\  argument
921 	for (iter = mem_cgroup_iter(NULL, NULL, NULL);	\
922 	     iter != NULL;				\
923 	     iter = mem_cgroup_iter(NULL, iter, NULL))
941 	struct mem_cgroup *iter;  in mem_cgroup_scan_tasks()  local
946 	for_each_mem_cgroup_tree(iter, memcg) {  in mem_cgroup_scan_tasks()
950 		css_task_iter_start(&iter->css, &it);  in mem_cgroup_scan_tasks()
955 			mem_cgroup_iter_break(memcg, iter);  in mem_cgroup_scan_tasks()
1154 	struct mem_cgroup *iter;  in mem_cgroup_print_oom_info()  local
1182 	for_each_mem_cgroup_tree(iter, memcg) {  in mem_cgroup_print_oom_info()
1184 		pr_cont_cgroup_path(iter->css.cgroup);  in mem_cgroup_print_oom_info()
1191 				K(mem_cgroup_read_stat(iter, i)));  in mem_cgroup_print_oom_info()
1196 				K(mem_cgroup_nr_lru_pages(iter, BIT(i))));  in mem_cgroup_print_oom_info()
1209 	struct mem_cgroup *iter;  in mem_cgroup_count_children()  local
1211 	for_each_mem_cgroup_tree(iter, memcg)  in mem_cgroup_count_children()
1413 	struct mem_cgroup *iter, *failed = NULL;  in mem_cgroup_oom_trylock()  local
1417 	for_each_mem_cgroup_tree(iter, memcg) {  in mem_cgroup_oom_trylock()
1418 		if (iter->oom_lock) {  in mem_cgroup_oom_trylock()
1423 			failed = iter;  in mem_cgroup_oom_trylock()
1424 			mem_cgroup_iter_break(memcg, iter);  in mem_cgroup_oom_trylock()
1427 			iter->oom_lock = true;  in mem_cgroup_oom_trylock()
1435 		for_each_mem_cgroup_tree(iter, memcg) {  in mem_cgroup_oom_trylock()
1436 			if (iter == failed) {  in mem_cgroup_oom_trylock()
1437 				mem_cgroup_iter_break(memcg, iter);  in mem_cgroup_oom_trylock()
1440 			iter->oom_lock = false;  in mem_cgroup_oom_trylock()
1452 	struct mem_cgroup *iter;  in mem_cgroup_oom_unlock()  local
1456 	for_each_mem_cgroup_tree(iter, memcg)  in mem_cgroup_oom_unlock()
1457 		iter->oom_lock = false;  in mem_cgroup_oom_unlock()
1463 	struct mem_cgroup *iter;  in mem_cgroup_mark_under_oom()  local
1466 	for_each_mem_cgroup_tree(iter, memcg)  in mem_cgroup_mark_under_oom()
1467 		iter->under_oom++;  in mem_cgroup_mark_under_oom()
1473 	struct mem_cgroup *iter;  in mem_cgroup_unmark_under_oom()  local
1480 	for_each_mem_cgroup_tree(iter, memcg)  in mem_cgroup_unmark_under_oom()
1481 		if (iter->under_oom > 0)  in mem_cgroup_unmark_under_oom()
1482 			iter->under_oom--;  in mem_cgroup_unmark_under_oom()
2728 	struct mem_cgroup *iter;  in tree_stat()  local
2733 	for_each_mem_cgroup_tree(iter, memcg) {  in tree_stat()
2735 			stat[i] += mem_cgroup_read_stat(iter, i);  in tree_stat()
2741 	struct mem_cgroup *iter;  in tree_events()  local
2746 	for_each_mem_cgroup_tree(iter, memcg) {  in tree_events()
2748 			events[i] += mem_cgroup_read_events(iter, i);  in tree_events()
2757 		struct mem_cgroup *iter;  in mem_cgroup_usage()  local
2759 		for_each_mem_cgroup_tree(iter, memcg) {  in mem_cgroup_usage()
2760 			val += mem_cgroup_read_stat(iter,  in mem_cgroup_usage()
2762 			val += mem_cgroup_read_stat(iter,  in mem_cgroup_usage()
2765 				val += mem_cgroup_read_stat(iter,  in mem_cgroup_usage()
3120 		struct mem_cgroup *iter;  in memcg_numa_stat_show()  local
3123 		for_each_mem_cgroup_tree(iter, memcg)  in memcg_numa_stat_show()
3124 			nr += mem_cgroup_nr_lru_pages(iter, stat->lru_mask);  in memcg_numa_stat_show()
3128 			for_each_mem_cgroup_tree(iter, memcg)  in memcg_numa_stat_show()
3130 					iter, nid, stat->lru_mask);  in memcg_numa_stat_show()
3349 	struct mem_cgroup *iter;  in mem_cgroup_oom_notify()  local
3351 	for_each_mem_cgroup_tree(iter, memcg)  in mem_cgroup_oom_notify()
3352 		mem_cgroup_oom_notify_cb(iter);  in mem_cgroup_oom_notify()