# Re: \[PATCH 04/29\] md: use bdev\_nr\_sectors instead of open coding it

- From: Song Liu \<song@kernel.org\>
- Date: 2021-10-13 21:14:48 
- List: linux-bcache
- Page: https://ratatoskr.run/linux-bcache/2021/10/215924
- Thread: https://ratatoskr.run/linux-block/2021/10/215820/t.md

```text
On Tue, Oct 12, 2021 at 11:12 PM Kees Cook [ref] wrote:
>
> On Wed, Oct 13, 2021 at 07:10:17AM +0200, Christoph Hellwig wrote:
> > Use the proper helper to read the block device size.
> >
> > Signed-off-by: Christoph Hellwig <hch@lst.de>
>
> I think it might make sense, as you suggest earlier, to add a "bytes"
> helper. This is the first user in the series needing:
>
>         bdev_nr_sectors(...bdev) << SECTOR_SHIFT
>
> Reviewed-by: Kees Cook <redacted>

Acked-by: Song Liu <song@kernel.org>
```