[PATCH 12/26] bcache: convert to blk_alloc_disk/blk_cleanup_disk

[Christoph Hellwig]

On Fri, May 21, 2021 at 02:15:32PM +0800, Coly Li wrote:
> The  above 2 lines are added on purpose to prevent an refcount
> underflow. It is from commit 86da9f736740 ("bcache: fix refcount
> underflow in bcache_device_free()").
> 
> Maybe add a parameter to blk_cleanup_disk() or checking (disk->flags &
> GENHD_FL_UP) inside blk_cleanup_disk() ?

Please take a look at patch 4 in the series.