On 5/21/21 7:50 AM, Christoph Hellwig wrote:

Untangle the mess around blk_alloc_devt by moving the check for
the used allocation scheme into the callers.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
  block/blk.h             |  4 +-
  block/genhd.c           | 96 ++++++++++++++++-------------------------
  block/partitions/core.c | 15 +++++--
  3 files changed, 49 insertions(+), 66 deletions(-)

... and also fixes an issue with GENHD_FL_UP remained set in an error 
path in __device_add_disk().

Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                Kernel Storage Architect
hare@suse.de                              +49 911 74053 688
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