linux-kernel - [PATCH] fs:ext3: remove lock_buffer in bclean() and setup_new_group

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Date:	Sun,  2 Dec 2012 01:40:28 +0000
From:	Cong Ding <dinggnu@...il.com>
To:	Jan Kara <jack@...e.cz>, Andrew Morton <akpm@...ux-foundation.org>,
	Andreas Dilger <adilger.kernel@...ger.ca>,
	linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	Cong Ding <dinggnu@...il.com>
Subject: [PATCH] fs:ext3: remove lock_buffer in bclean() and setup_new_group_blocks

it's not necessary to lock the buffers because no one touches them
beyond the file system.

Signed-off-by: Cong Ding <dinggnu@...il.com>
---
 fs/ext3/resize.c |    4 ----
 1 files changed, 0 insertions(+), 4 deletions(-)

diff --git a/fs/ext3/resize.c b/fs/ext3/resize.c
index 0f814f3..f76fcd6 100644
--- a/fs/ext3/resize.c
+++ b/fs/ext3/resize.c
@@ -122,10 +122,8 @@ static struct buffer_head *bclean(handle_t *handle, struct super_block *sb,
 		brelse(bh);
 		bh = ERR_PTR(err);
 	} else {
-		lock_buffer(bh);
 		memset(bh->b_data, 0, sb->s_blocksize);
 		set_buffer_uptodate(bh);
-		unlock_buffer(bh);
 	}
 
 	return bh;
@@ -242,10 +240,8 @@ static int setup_new_group_blocks(struct super_block *sb,
 			brelse(gdb);
 			goto exit_bh;
 		}
-		lock_buffer(gdb);
 		memcpy(gdb->b_data, sbi->s_group_desc[i]->b_data, gdb->b_size);
 		set_buffer_uptodate(gdb);
-		unlock_buffer(gdb);
 		err = ext3_journal_dirty_metadata(handle, gdb);
 		if (err) {
 			brelse(gdb);
-- 
1.7.4.5

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