From: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Date: Fri, 3 Jan 2014 10:22:57 +0000 (+0800)
Subject: Btrfs: only fua the first superblock when writting supers
X-Git-Tag: upstream/snapshot3+hdmi~3409^2~75
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e8117c26b24098496b6011aabe84e43e0189a506;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

Btrfs: only fua the first superblock when writting supers

We only intent to fua the first superblock in every device from
comments, fix it.

Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
---

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 0400a26..9850a51 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -3133,7 +3133,10 @@ static int write_dev_supers(struct btrfs_device *device,
 		 * we fua the first super.  The others we allow
 		 * to go down lazy.
 		 */
-		ret = btrfsic_submit_bh(WRITE_FUA, bh);
+		if (i == 0)
+			ret = btrfsic_submit_bh(WRITE_FUA, bh);
+		else
+			ret = btrfsic_submit_bh(WRITE_SYNC, bh);
 		if (ret)
 			errors++;
 	}