linux-kernel - Re: [PATCH 06/27] BKL: Remove BKL from ext3 fill

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Message-ID: <20091105115539.GA12770@duck.suse.cz>
Date:	Thu, 5 Nov 2009 12:55:39 +0100
From:	Jan Kara <jack@...e.cz>
To:	Jan Blunck <jblunck@...e.de>
Cc:	linux-fsdevel@...r.kernel.org, Matthew Wilcox <matthew@....cx>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andreas Dilger <adilger@....com>, Jan Kara <jack@...e.cz>,
	Al Viro <viro@...iv.linux.org.uk>,
	Theodore Ts'o <tytso@....edu>, linux-ext4@...r.kernel.org
Subject: Re: [PATCH 06/27] BKL: Remove BKL from ext3 fill_super()

On Mon 02-11-09 11:04:46, Jan Blunck wrote:
> The BKL is protecting nothing than two memory allocations here.
  The patch looks good.
Acked-by: Jan Kara <jack@...e.cz>
  Should I merge it or will you do it with other patches?

									Honza
> 
> Signed-off-by: Jan Blunck <jblunck@...e.de>
> ---
>  fs/ext3/super.c |   13 +------------
>  1 files changed, 1 insertions(+), 12 deletions(-)
> 
> diff --git a/fs/ext3/super.c b/fs/ext3/super.c
> index 38261a5..4b635b7 100644
> --- a/fs/ext3/super.c
> +++ b/fs/ext3/super.c
> @@ -1568,19 +1568,14 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
>  	__le32 features;
>  	int err;
>  
> -	lock_kernel();
> -
>  	sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
> -	if (!sbi) {
> -		unlock_kernel();
> +	if (!sbi)
>  		return -ENOMEM;
> -	}
>  
>  	sbi->s_blockgroup_lock =
>  		kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
>  	if (!sbi->s_blockgroup_lock) {
>  		kfree(sbi);
> -		unlock_kernel();
>  		return -ENOMEM;
>  	}
>  	sb->s_fs_info = sbi;
> @@ -1589,8 +1584,6 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
>  	sbi->s_resgid = EXT3_DEF_RESGID;
>  	sbi->s_sb_block = sb_block;
>  
> -	unlock_kernel();
> -
>  	blocksize = sb_min_blocksize(sb, EXT3_MIN_BLOCK_SIZE);
>  	if (!blocksize) {
>  		printk(KERN_ERR "EXT3-fs: unable to set blocksize\n");
> @@ -1996,8 +1989,6 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
>  		test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA ? "ordered":
>  		"writeback");
>  
> -	lock_kernel();
> -	unlock_kernel();
>  	return 0;
>  
>  cantfind_ext3:
> @@ -2027,8 +2018,6 @@ out_fail:
>  	sb->s_fs_info = NULL;
>  	kfree(sbi->s_blockgroup_lock);
>  	kfree(sbi);
> -	lock_kernel();
> -	unlock_kernel();
>  	return ret;
>  }
>  
> -- 
> 1.6.4.2
> 
-- 
Jan Kara <jack@...e.cz>
SUSE Labs, CR
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