Dont touch fs_struct in usermodehelper

This test seems to be unnecessary since we always have rootfs mounted before
calling a usermodehelper.
Signed-off-by: NAndreas Gruenbacher <agruen@suse.de>
Signed-off-by: NJan Blunck <jblunck@suse.de>
Acked-by: NChristoph Hellwig <hch@lst.de>
Acked-by: NGreg KH <greg@kroah.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

kernel/kmod.c

@@ -173,10 +173,7 @@ static int ____call_usermodehelper(void *data)
 	 */
 	set_user_nice(current, 0);
 
-	retval = -EPERM;
-	if (current->fs->root)
-		retval = kernel_execve(sub_info->path,
-				sub_info->argv, sub_info->envp);
+	retval = kernel_execve(sub_info->path, sub_info->argv, sub_info->envp);
 
 	/* Exec failed? */
 	sub_info->retval = retval;