linux-kernel - [PATCH 27/30] fat: do not send discards as barriers

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Date:	Wed, 25 Aug 2010 17:47:44 +0200
From:	Tejun Heo <tj@...nel.org>
To:	jaxboe@...ionio.com, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, linux-scsi@...r.kernel.org,
	linux-ide@...r.kernel.org, linux-raid@...r.kernel.org, hch@....de,
	James.Bottomley@...e.de, tytso@....edu, chris.mason@...cle.com,
	swhiteho@...hat.com, konishi.ryusuke@....ntt.co.jp,
	dm-devel@...hat.com, vst@...b.net, jack@...e.cz,
	rwheeler@...hat.com, hare@...e.de, neilb@...e.de,
	rusty@...tcorp.com.au, mst@...hat.com, jeremy@...p.org,
	snitzer@...hat.com, k-ueda@...jp.nec.com
Cc:	Christoph Hellwig <hch@...radead.org>, Tejun Heo <tj@...nel.org>
Subject: [PATCH 27/30] fat: do not send discards as barriers

From: Christoph Hellwig <hch@...radead.org>

fat already uses synchronous discards, no need to add I/O barriers.

Signed-off-by: Christoph Hellwig <hch@....de>
Signed-off-by: Tejun Heo <tj@...nel.org>
---
 fs/fat/fatent.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/fs/fat/fatent.c b/fs/fat/fatent.c
index 3a56a82..f9a0b7a 100644
--- a/fs/fat/fatent.c
+++ b/fs/fat/fatent.c
@@ -579,7 +579,7 @@ int fat_free_clusters(struct inode *inode, int cluster)
 					fat_clus_to_blknr(sbi, first_cl),
 					nr_clus * sbi->sec_per_clus,
 					GFP_NOFS,
-					BLKDEV_IFL_WAIT | BLKDEV_IFL_BARRIER);
+					BLKDEV_IFL_WAIT);
 
 				first_cl = cluster;
 			}
-- 
1.7.1

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