Re: [PATCH 15/27] block: use bdev_alignment_offset in part_alignment_offset_show

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Hi Christoph,

On Wed, Apr 06, 2022 at 06:05:04AM +0000, Christoph Hellwig wrote:
> From: Christoph Hellwig <hch@xxxxxx>
> Subject: [PATCH 15/27] block: use bdev_alignment_offset in
>  part_alignment_offset_show
> 
> Replace the open coded offset calculation with the proper helper.
> This is an ABI change in that the -1 for a misaligned partition is
> properly propagated, which can be considered a bug fix and maches

s/maches/matches/

> what is done on the whole device.
> 
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
> ---
>  block/partitions/core.c | 6 +-----
>  1 file changed, 1 insertion(+), 5 deletions(-)
> 
> diff --git a/block/partitions/core.c b/block/partitions/core.c
> index 2ef8dfa1e5c85..240b3fff521e4 100644
> --- a/block/partitions/core.c
> +++ b/block/partitions/core.c
> @@ -200,11 +200,7 @@ static ssize_t part_ro_show(struct device *dev,
>  static ssize_t part_alignment_offset_show(struct device *dev,
>  					  struct device_attribute *attr, char *buf)
>  {
> -	struct block_device *bdev = dev_to_bdev(dev);
> -
> -	return sprintf(buf, "%u\n",
> -		queue_limit_alignment_offset(&bdev_get_queue(bdev)->limits,
> -				bdev->bd_start_sect));
> +	return sprintf(buf, "%u\n", bdev_alignment_offset(dev_to_bdev(dev)));

Should this now be %d instead of %u, there are one or two examples of
both in the rest of the patch series.

Alan




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