[PATCH 01/26] block: refactor device number setup in __device_add_disk

[Christoph Hellwig]

On Sun, May 23, 2021 at 09:46:01AM +0200, Hannes Reinecke wrote:
> ... and also fixes an issue with GENHD_FL_UP remained set in an error path 
> in __device_add_disk().

Well, the error path in __device_add_disk is a complete disaster right
now, but Luis is looking into it fortunately.