···195195static void mnt_ns_tree_remove(struct mnt_namespace *ns)196196{197197 /* remove from global mount namespace list */198198- if (!is_anon_ns(ns)) {198198+ if (!RB_EMPTY_NODE(&ns->mnt_ns_tree_node)) {199199 mnt_ns_tree_write_lock();200200 rb_erase(&ns->mnt_ns_tree_node, &mnt_ns_tree);201201 list_bidir_del_rcu(&ns->mnt_ns_list);