From c62988ec0910a2d480fecb2f0140a36fcdc7b691 Mon Sep 17 00:00:00 2001
From: majianpeng <majianpeng@gmail.com>
Date: Wed, 19 Jun 2013 15:12:06 +0800
Subject: ceph: avoid meaningless calling ceph_caps_revoking if sync_mode ==
 WB_SYNC_ALL.

Signed-off-by: Jianpeng Ma <majianpeng@gmail.com>
Reviewed-by: Sage Weil <sage@inktank.com>

diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index 3500b74..afb2fc2 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -666,8 +666,8 @@ static int ceph_writepages_start(struct address_space *mapping,
 	 * integrity write (e.g., O_SYNC write or fsync()), or if our
 	 * cap is being revoked.
 	 */
-	do_sync = wbc->sync_mode == WB_SYNC_ALL;
-	if (ceph_caps_revoking(ci, CEPH_CAP_FILE_BUFFER))
+	if ((wbc->sync_mode == WB_SYNC_ALL) ||
+		ceph_caps_revoking(ci, CEPH_CAP_FILE_BUFFER))
 		do_sync = 1;
 	dout("writepages_start %p dosync=%d (mode=%s)\n",
 	     inode, do_sync,
-- 
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