linux-kernel - [PATCH 41/42] ext4: Avoid double dirtying of super block in ext4_put

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Message-Id: <1223525160-9887-42-git-send-email-tytso@mit.edu>
Date:	Thu,  9 Oct 2008 00:05:59 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	Andi Kleen <andi@...stfloor.org>, Andi Kleen <ak@...ux.intel.com>
Subject: [PATCH 41/42] ext4: Avoid double dirtying of super block in ext4_put_super()

From: Andi Kleen <andi@...stfloor.org>

While reading code I noticed that ext4_put_super() dirties the
superblock bh twice. It is always done in ext4_commit_super()
too. Remove the redundant dirty operation.
Should be a nop semantically.

Signed-off-by: Andi Kleen <ak@...ux.intel.com>
---
 fs/ext4/super.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 9c02146..7d86560 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -512,8 +512,6 @@ static void ext4_put_super(struct super_block *sb)
 	if (!(sb->s_flags & MS_RDONLY)) {
 		EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
 		es->s_state = cpu_to_le16(sbi->s_mount_state);
-		BUFFER_TRACE(sbi->s_sbh, "marking dirty");
-		mark_buffer_dirty(sbi->s_sbh);
 		ext4_commit_super(sb, es, 1);
 	}
 	if (sbi->s_proc) {
-- 
1.5.6.1.205.ge2c7.dirty

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