remove unused bh in calls to ext234_get_group_desc

ext[234]_get_group_desc never tests the bh argument, and only sets it if it
is passed in; it is perfectly happy with a NULL bh argument.  But, many
callers send one in and never use it.  May as well call with NULL like
other callers who don't use the bh.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index 1b102a1..8481817 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -1028,7 +1028,7 @@
 		goto Einval;
 
 	block_group = (ino - 1) / EXT2_INODES_PER_GROUP(sb);
-	gdp = ext2_get_group_desc(sb, block_group, &bh);
+	gdp = ext2_get_group_desc(sb, block_group, NULL);
 	if (!gdp)
 		goto Egdp;
 	/*