Re: [PATCH 04/10] ext4: factor out journalled block zeroing range

[Jan Kara <jack@suse.cz>]

On Tue 10-03-26 09:40:55, Zhang Yi wrote:
> From: Zhang Yi <yi.zhang@huawei.com>
> 
> Refactor __ext4_block_zero_page_range() by separating the block zeroing
> operations for ordered data mode and journal data mode into two distinct
> functions:
> 
>   - ext4_block_do_zero_range(): handles non-journal data mode with
>     ordered data support
>   - ext4_block_journalled_zero_range(): handles journal data mode
> 
> Also extract a common helper, ext4_block_get_zero_range(), to handle
> buffer head and folio retrieval, along with the associated error
> handling. This prepares for converting the partial block zero range to
> the iomap infrastructure.
> 
> Signed-off-by: Zhang Yi <yi.zhang@huawei.com>

Just one nit below. Otherwise feel free to add:

Reviewed-by: Jan Kara <jack@suse.cz>

> diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
> index 52c6a86ad9f9..d63d455831b9 100644
> --- a/fs/ext4/inode.c
> +++ b/fs/ext4/inode.c
> @@ -4002,13 +4002,12 @@ void ext4_set_aops(struct inode *inode)
>   * ext4_punch_hole, etc) which needs to be properly zeroed out. Otherwise a
>   * racing writeback can come later and flush the stale pagecache to disk.
>   */
> -static int __ext4_block_zero_page_range(handle_t *handle,
> -		struct address_space *mapping, loff_t from, loff_t length,
> -		bool *did_zero)
> +static struct buffer_head *ext4_block_get_zero_range(struct inode *inode,
> +				      loff_t from, loff_t length)

I'd call this function ext4_load_tail_bh() and AFAICT the 'length' argument
is unused so it can be dropped.

								Honza
-- 
Jan Kara <jack@suse.com>
SUSE Labs, CR