userns: Convert devtmpfs to use GLOBAL_ROOT_UID and GLOBAL_ROOT_GID

Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>

drivers/base/devtmpfs.c

@@ -309,8 +309,8 @@ static int handle_remove(const char *nodename, struct device *dev)
 			 * before unlinking this node, reset permissions
 			 * of possible references like hardlinks
 			 */
-			newattrs.ia_uid = 0;
-			newattrs.ia_gid = 0;
+			newattrs.ia_uid = GLOBAL_ROOT_UID;
+			newattrs.ia_gid = GLOBAL_ROOT_GID;
 			newattrs.ia_mode = stat.mode & ~0777;
 			newattrs.ia_valid =
 				ATTR_UID|ATTR_GID|ATTR_MODE;

init/Kconfig

@@ -932,7 +932,6 @@ config UIDGID_CONVERTED
 	depends on NET_9P = n
 
 	# Filesystems
-	depends on DEVTMPFS = n
 	depends on XENFS = n
 
 	depends on 9P_FS = n