Re: [PATCH 5/5] fs/block_dev: replace GENHD_FL_UP with GENHD_FL_DISK_ADDED

[Christoph Hellwig]

On Tue, Jul 20, 2021 at 11:20:48AM -0700, Luis Chamberlain wrote:
> The GENHD_FL_DISK_ADDED flag is what we really want, as the
> flag GENHD_FL_UP could be set on a semi-initialized device.

No.  Here we must reject opens once del_gendisk has been called.