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Date:	Thu, 15 Oct 2015 10:57:29 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	"Darrick J. Wong" <darrick.wong@...cle.com>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: [PATCH 6/8] ext4: make the bitmap read routines return real
 error codes

On Mon, Oct 12, 2015 at 02:54:58PM -0700, Darrick J. Wong wrote:
>   * Return buffer_head on success or NULL in case of failure.
>   */
> -struct buffer_head *
> -ext4_read_block_bitmap_nowait(struct super_block *sb, ext4_group_t block_group)
> +int
> +ext4_read_block_bitmap_nowait(struct super_block *sb, ext4_group_t block_group,
> +			      struct buffer_head **bbh)


Is there a reason why you didn't use the ERR_PTR convention?

>  
> -struct buffer_head *
> -ext4_read_block_bitmap(struct super_block *sb, ext4_group_t block_group)
> +int
> +ext4_read_block_bitmap(struct super_block *sb, ext4_group_t block_group,
> +		       struct buffer_head **bbh)

And here....

>   * Return buffer_head of bitmap on success or NULL.
>   */
> -static struct buffer_head *
> -ext4_read_inode_bitmap(struct super_block *sb, ext4_group_t block_group)
> +static int
> +ext4_read_inode_bitmap(struct super_block *sb, ext4_group_t block_group,
> +		       struct buffer_head **bbh)
>  {

And here....

					- Ted
					
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