vfs: live vfsmounts never have NULL ->mnt_sb

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

drivers/usb/core/inode.c

@@ -264,7 +264,7 @@ static int remount(struct super_block *sb, int *flags, char *data)
 		return -EINVAL;
 	}
 
-	if (usbfs_mount && usbfs_mount->mnt_sb)
+	if (usbfs_mount)
 		update_sb(usbfs_mount->mnt_sb);
 
 	return 0;
@@ -500,10 +500,9 @@ static int fs_create_by_name (const char *name, mode_t mode,
 	 * have around.
 	 */
 	if (!parent ) {
-		if (usbfs_mount && usbfs_mount->mnt_sb) {
+		if (usbfs_mount)
 			parent = usbfs_mount->mnt_root;
 	}
-	}
 
 	if (!parent) {
 		dbg("Ah! can not find a parent!");

fs/configfs/dir.c

@@ -311,7 +311,7 @@ static int configfs_create_dir(struct config_item * item, struct dentry *dentry)
 
 	if (item->ci_parent)
 		parent = item->ci_parent->ci_dentry;
-	else if (configfs_mount && configfs_mount->mnt_sb)
+	else if (configfs_mount)
 		parent = configfs_mount->mnt_root;
 	else
 		return -EFAULT;