linux-kernel - [PATCHv2 3/6] hfs: remove extra mdb write on unmount

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Message-Id: <1342103329-17526-4-git-send-email-dedekind1@gmail.com>
Date:	Thu, 12 Jul 2012 17:28:46 +0300
From:	Artem Bityutskiy <dedekind1@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Al Viro <viro@...IV.linux.org.uk>
Cc:	Linux FS Maling List <linux-fsdevel@...r.kernel.org>,
	Linux Kernel Maling List <linux-kernel@...r.kernel.org>
Subject: [PATCHv2 3/6] hfs: remove extra mdb write on unmount

From: Artem Bityutskiy <artem.bityutskiy@...ux.intel.com>

HFS calls 'hfs_write_super()' from 'hfs_put_super()' in order to write the MDB
to the media. However, it is not needed because VFS calls '->sync_fs()' before
calling '->put_super()' - so by the time we are in 'hfs_write_super()', the MDB
is already synchronized.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@...ux.intel.com>
---
 fs/hfs/super.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)

diff --git a/fs/hfs/super.c b/fs/hfs/super.c
index f7c06bb..47e4119 100644
--- a/fs/hfs/super.c
+++ b/fs/hfs/super.c
@@ -74,8 +74,6 @@ static int hfs_sync_fs(struct super_block *sb, int wait)
  */
 static void hfs_put_super(struct super_block *sb)
 {
-	if (sb->s_dirt)
-		hfs_write_super(sb);
 	hfs_mdb_close(sb);
 	/* release the MDB's resources */
 	hfs_mdb_put(sb);
-- 
1.7.7.6

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