[dm-devel] [PATCH 36/44] block: allocate struct hd_struct as part of struct bdev_inode

[Christoph Hellwig]

On Thu, Nov 26, 2020 at 07:00:48PM +0100, Jan Kara wrote:
> > I don't think hd_struct holds a reference to block_device, does it?
> > bdev_alloc() now just assigns bdev->bd_part->bdev = bdev...
> 
> Now I understood this is probably correct - each partition (including
> gendisk as 0 partition) holds the initial bdev reference and only when
> corresponding kobject is getting destroyed we stop holding onto that
> reference. Right?

Yes.