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