This patch should be merged with ext4-online-defrag-relocate-file-data.patch

It originally came from ext4_journal_credits_fix_for_writepages.patch,
but was split off when this patch was moved into the stable part of
the patch queue.

Cc: Akira Fujita <a-fujita@rs.jp.nec.com>
Cc: Takashi Sato <t-sato@yk.jp.nec.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
---

Index: linux-2.6.26-git6/fs/ext4/defrag.c
===================================================================
--- linux-2.6.26-git6.orig/fs/ext4/defrag.c	2008-07-25 17:39:23.000000000 -0700
+++ linux-2.6.26-git6/fs/ext4/defrag.c	2008-07-25 17:39:52.000000000 -0700
@@ -1494,7 +1495,7 @@ ext4_defrag_partial(struct inode *tmp_in
 	 * It needs twice the amount of ordinary journal buffers because
 	 * inode and tmp_inode may change each different metadata blocks.
 	 */
-	jblocks = ext4_writepage_trans_blocks(org_inode) * 2;
+	jblocks = ext4_writepages_trans_blocks(org_inode, 1) * 2;
 	handle = ext4_journal_start(org_inode, jblocks);
 	if (IS_ERR(handle)) {
 		ret = PTR_ERR(handle);