[PATCH] jbd: use BUILD_BUG_ON in journal init

Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
Acked-by: NStephen Tweedie <sct@redhat.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

fs/jbd/journal.c

@@ -2047,13 +2047,7 @@ static int __init journal_init(void)
 {
 	int ret;
 
-/* Static check for data structure consistency.  There's no code
- * invoked --- we'll just get a linker failure if things aren't right.
- */
-	extern void journal_bad_superblock_size(void);
-	if (sizeof(struct journal_superblock_s) != 1024)
-		journal_bad_superblock_size();
-
+	BUILD_BUG_ON(sizeof(struct journal_superblock_s) != 1024);
 
 	ret = journal_init_caches();
 	if (ret != 0)