Re: [PATCH v2 0/4] Add invalidate_disk() helper for drivers to invalidate the gendisk

[Yongji Xie <xieyongji@bytedance.com>]

Ping

On Wed, Sep 22, 2021 at 8:37 PM Xie Yongji <xieyongji@bytedance.com> wrote:
>
> This series comes from Christoph Hellwig's suggestion [1]. Some block
> device drivers such as loop driver and nbd driver need to invalidate
> the gendisk when the backend is detached so that the gendisk can be
> reused by the new backend. Now the invalidation is done in device
> driver with their own ways. To avoid code duplication and hide
> some internals of the implementation, this series adds a block layer
> helper and makes both loop driver and nbd driver use it.
>
> [1] https://lore.kernel.org/all/YTmqJHd7YWAQ2lZ7@infradead.org/
>
> V1 to V2:
> - Rename invalidate_gendisk() to invalidate_disk()
> - Add a cleanup patch to remove bdev checks and bdev variable in __loop_clr_fd()
>
> Xie Yongji (4):
>   block: Add invalidate_disk() helper to invalidate the gendisk
>   loop: Use invalidate_disk() helper to invalidate gendisk
>   loop: Remove the unnecessary bdev checks and unused bdev variable
>   nbd: Use invalidate_disk() helper on disconnect
>
>  block/genhd.c         | 20 ++++++++++++++++++++
>  drivers/block/loop.c  | 15 ++++-----------
>  drivers/block/nbd.c   | 12 +++---------
>  include/linux/genhd.h |  2 ++
>  4 files changed, 29 insertions(+), 20 deletions(-)
>
> --
> 2.11.0
>