dm bufio: use BUG_ON instead of conditional call to BUG

Signed-off-by: NAnup Limbu <anuplimbu14@gmail.com>
Signed-off-by: NMike Snitzer <snitzer@redhat.com>

drivers/md/dm-bufio.c

@@ -1928,8 +1928,7 @@ static void __exit dm_bufio_exit(void)
 		bug = 1;
 	}
 
-	if (bug)
-		BUG();
+	BUG_ON(bug);
 }
 
 module_init(dm_bufio_init)