442 static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg)  in mem_cgroup_is_root()  function
492 			BUG_ON(mem_cgroup_is_root(sk->sk_cgrp->memcg));  in sock_update_memcg()
500 		if (!mem_cgroup_is_root(memcg) &&  in sock_update_memcg()
522 	if (!memcg || mem_cgroup_is_root(memcg))  in tcp_proto_cgroup()
2230 	if (mem_cgroup_is_root(memcg))  in try_charge()
2344 	if (mem_cgroup_is_root(memcg))  in cancel_charge()
2714 	VM_BUG_ON(mem_cgroup_is_root(memcg));  in __memcg_kmem_commit_charge()
2731 	VM_BUG_ON_PAGE(mem_cgroup_is_root(memcg), page);  in __memcg_kmem_uncharge_pages()
3068 	if (mem_cgroup_is_root(memcg))  in mem_cgroup_force_empty_write()
3133 	if (mem_cgroup_is_root(memcg)) {  in mem_cgroup_usage()
3311 		if (mem_cgroup_is_root(memcg)) { /* Can't set limit on root */  in mem_cgroup_write()
4967 		if (!mem_cgroup_is_root(mc.from))  in __mem_cgroup_clear_mc()
4974 		if (!mem_cgroup_is_root(mc.to))  in __mem_cgroup_clear_mc()
5606 	if (!mem_cgroup_is_root(memcg)) {  in uncharge_batch()
5622 	if (!mem_cgroup_is_root(memcg))  in uncharge_batch()
5843 	if (!mem_cgroup_is_root(memcg))  in mem_cgroup_swapout()
5869 		if (!mem_cgroup_is_root(memcg))  in mem_cgroup_uncharge_swap()