--- open.c.0	Wed Feb  9 12:53:07 2000
+++ open.c	Wed Feb  9 12:53:44 2000
@@ -898,16 +898,9 @@
  */
 asmlinkage long sys_vhangup(void)
 {
-	int ret = -EPERM;
-
 	if (!capable(CAP_SYS_TTY_CONFIG))
-		goto out;
-	/* If there is a controlling tty, hang it up */
-	lock_kernel();
+		return -EPERM;
 	if (current->tty)
 		tty_vhangup(current->tty);
-	unlock_kernel();
-	ret = 0;
-out:
-	return ret;
+	return 0;
 }

.