diff --git a/include/linux/user_namespace.h b/include/linux/user_namespace.h
index 9217169..4e79b3c 100644
--- a/include/linux/user_namespace.h
+++ b/include/linux/user_namespace.h
@@ -39,6 +39,7 @@
 	struct key		*persistent_keyring_register;
 	struct rw_semaphore	persistent_keyring_register_sem;
 #endif
+	struct work_struct	work;
 };
 
 extern struct user_namespace init_user_ns;
@@ -54,12 +55,12 @@
 
 extern int create_user_ns(struct cred *new);
 extern int unshare_userns(unsigned long unshare_flags, struct cred **new_cred);
-extern void free_user_ns(struct user_namespace *ns);
+extern void __put_user_ns(struct user_namespace *ns);
 
 static inline void put_user_ns(struct user_namespace *ns)
 {
 	if (ns && atomic_dec_and_test(&ns->count))
-		free_user_ns(ns);
+		__put_user_ns(ns);
 }
 
 struct seq_operations;