ACK: [SRU][Xenial][PATCH 1/1] bcache: partition support: add 16 minors per bcacheN device

[Po-Hsu Lin]

On Sun, Jul 30, 2017 at 10:52 PM, Joseph Salisbury <joseph.salisbury at canonical.com> wrote:
> From: Eric Wheeler <git at linux.ewheeler.net>
>
> BugLink: http://bugs.launchpad.net/bugs/1705493
>
> Signed-off-by: Eric Wheeler <bcache at linux.ewheeler.net>
> Tested-by: Wido den Hollander <wido at widodh.nl>
> (cherry picked from commit b8c0d911ac5285e6be8967713271a51bdc5a936a)
> Signed-off-by: Joseph Salisbury <joseph.salisbury at canonical.com>
Clean cherry-pick with positive test result.

Acked-by: Po-Hsu Lin <po-hsu.lin at canonical.com>

> ---
>  drivers/md/bcache/super.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
> index cc55e08..11e976e 100644
> --- a/drivers/md/bcache/super.c
> +++ b/drivers/md/bcache/super.c
> @@ -58,6 +58,7 @@ static wait_queue_head_t unregister_wait;
>  struct workqueue_struct *bcache_wq;
>
>  #define BTREE_MAX_PAGES                (256 * 1024 / PAGE_SIZE)
> +#define BCACHE_MINORS          16 /* partition support */
>
>  /* Superblock */
>
> @@ -781,8 +782,10 @@ static int bcache_device_init(struct bcache_device *d, unsigned block_size,
>         if (minor < 0)
>                 return minor;
>
> +       minor *= BCACHE_MINORS;
> +
>         if (!(d->bio_split = bioset_create(4, offsetof(struct bbio, bio))) ||
> -           !(d->disk = alloc_disk(1))) {
> +           !(d->disk = alloc_disk(BCACHE_MINORS))) {
>                 ida_simple_remove(&bcache_minor, minor);
>                 return -ENOMEM;
>         }
> --
> 2.7.4
>
>
> --
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