[PATCH] uml: Kill a compilation warning

Kill a compilation warning.
Signed-off-by: NJeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

arch/um/kernel/exec.c

@@ -39,9 +39,9 @@ static long execve1(char *file, char __user * __user *argv,
 		    char __user *__user *env)
 {
         long error;
+#ifdef CONFIG_TTY_LOG
 	struct tty_struct *tty;
 
-#ifdef CONFIG_TTY_LOG
 	mutex_lock(&tty_mutex);
 	tty = get_current_tty();
 	if (tty)