876 	struct mem_cgroup_reclaim_iter *uninitialized_var(iter);  in mem_cgroup_iter()
902 		iter = &mz->iter[reclaim->priority];  in mem_cgroup_iter()
904 		if (prev && reclaim->generation != iter->generation)  in mem_cgroup_iter()
908 			pos = READ_ONCE(iter->position);  in mem_cgroup_iter()
919 			(void)cmpxchg(&iter->position, pos, NULL);  in mem_cgroup_iter()
971 		(void)cmpxchg(&iter->position, pos, memcg);  in mem_cgroup_iter()
977 			iter->generation++;  in mem_cgroup_iter()
979 			reclaim->generation = iter->generation;  in mem_cgroup_iter()
1008 	struct mem_cgroup_reclaim_iter *iter;  in invalidate_reclaim_iterators()  local
1018 					iter = &mz->iter[i];  in invalidate_reclaim_iterators()
1019 					cmpxchg(&iter->position,  in invalidate_reclaim_iterators()
1032 #define for_each_mem_cgroup_tree(iter, root)		\  argument
1033 	for (iter = mem_cgroup_iter(root, NULL, NULL);	\
1034 	     iter != NULL;				\
1035 	     iter = mem_cgroup_iter(root, iter, NULL))
1037 #define for_each_mem_cgroup(iter)			\  argument
1038 	for (iter = mem_cgroup_iter(NULL, NULL, NULL);	\
1039 	     iter != NULL;				\
1040 	     iter = mem_cgroup_iter(NULL, iter, NULL))
1255 	struct mem_cgroup *iter;  in mem_cgroup_print_oom_info()  local
1284 	for_each_mem_cgroup_tree(iter, memcg) {  in mem_cgroup_print_oom_info()
1286 		pr_cont_cgroup_path(iter->css.cgroup);  in mem_cgroup_print_oom_info()
1293 				K(mem_cgroup_read_stat(iter, i)));  in mem_cgroup_print_oom_info()
1298 				K(mem_cgroup_nr_lru_pages(iter, BIT(i))));  in mem_cgroup_print_oom_info()
1312 	struct mem_cgroup *iter;  in mem_cgroup_count_children()  local
1314 	for_each_mem_cgroup_tree(iter, memcg)  in mem_cgroup_count_children()
1345 	struct mem_cgroup *iter;  in mem_cgroup_out_of_memory()  local
1365 	for_each_mem_cgroup_tree(iter, memcg) {  in mem_cgroup_out_of_memory()
1369 		css_task_iter_start(&iter->css, &it);  in mem_cgroup_out_of_memory()
1383 				mem_cgroup_iter_break(memcg, iter);  in mem_cgroup_out_of_memory()
1579 	struct mem_cgroup *iter, *failed = NULL;  in mem_cgroup_oom_trylock()  local
1583 	for_each_mem_cgroup_tree(iter, memcg) {  in mem_cgroup_oom_trylock()
1584 		if (iter->oom_lock) {  in mem_cgroup_oom_trylock()
1589 			failed = iter;  in mem_cgroup_oom_trylock()
1590 			mem_cgroup_iter_break(memcg, iter);  in mem_cgroup_oom_trylock()
1593 			iter->oom_lock = true;  in mem_cgroup_oom_trylock()
1601 		for_each_mem_cgroup_tree(iter, memcg) {  in mem_cgroup_oom_trylock()
1602 			if (iter == failed) {  in mem_cgroup_oom_trylock()
1603 				mem_cgroup_iter_break(memcg, iter);  in mem_cgroup_oom_trylock()
1606 			iter->oom_lock = false;  in mem_cgroup_oom_trylock()
1618 	struct mem_cgroup *iter;  in mem_cgroup_oom_unlock()  local
1622 	for_each_mem_cgroup_tree(iter, memcg)  in mem_cgroup_oom_unlock()
1623 		iter->oom_lock = false;  in mem_cgroup_oom_unlock()
1629 	struct mem_cgroup *iter;  in mem_cgroup_mark_under_oom()  local
1632 	for_each_mem_cgroup_tree(iter, memcg)  in mem_cgroup_mark_under_oom()
1633 		iter->under_oom++;  in mem_cgroup_mark_under_oom()
1639 	struct mem_cgroup *iter;  in mem_cgroup_unmark_under_oom()  local
1646 	for_each_mem_cgroup_tree(iter, memcg)  in mem_cgroup_unmark_under_oom()
1647 		if (iter->under_oom > 0)  in mem_cgroup_unmark_under_oom()
1648 			iter->under_oom--;  in mem_cgroup_unmark_under_oom()
2821 	struct mem_cgroup *iter;  in tree_stat()  local
2824 	for_each_mem_cgroup_tree(iter, memcg)  in tree_stat()
2825 		val += mem_cgroup_read_stat(iter, idx);  in tree_stat()
3133 		struct mem_cgroup *iter;  in memcg_numa_stat_show()  local
3136 		for_each_mem_cgroup_tree(iter, memcg)  in memcg_numa_stat_show()
3137 			nr += mem_cgroup_nr_lru_pages(iter, stat->lru_mask);  in memcg_numa_stat_show()
3141 			for_each_mem_cgroup_tree(iter, memcg)  in memcg_numa_stat_show()
3143 					iter, nid, stat->lru_mask);  in memcg_numa_stat_show()
3363 	struct mem_cgroup *iter;  in mem_cgroup_oom_notify()  local
3365 	for_each_mem_cgroup_tree(iter, memcg)  in mem_cgroup_oom_notify()
3366 		mem_cgroup_oom_notify_cb(iter);  in mem_cgroup_oom_notify()