Hi all,

this series first cleans up gendisk allocation in the md driver to remove
the ERESTARTSYS hack in blkdev_get, then further refactors blkdev_get
and then finally moves bd_mutex into the gendisk as having separate locks
for the whole device vs partitions just complicates locking in places that
add an remove partitions a lot.

Note that this series sits on top of the for-5.13/drivers branch as that
has the ->revalidate_disk cleanup.

Diffstat:
 Documentation/filesystems/locking.rst |    2 
 block/genhd.c                         |   55 +++-----
 block/partitions/core.c               |   45 +++----
 drivers/block/loop.c                  |   14 +-
 drivers/block/xen-blkfront.c          |    8 -
 drivers/block/zram/zram_drv.c         |   18 +-
 drivers/block/zram/zram_drv.h         |    2 
 drivers/md/md.c                       |  204 ++++++++++++++++-----------------
 drivers/md/md.h                       |    6 
 drivers/s390/block/dasd_genhd.c       |    8 -
 drivers/scsi/sd.c                     |    4 
 fs/block_dev.c                        |  208 +++++++++++++++-------------------
 fs/btrfs/volumes.c                    |    2 
 fs/super.c                            |    8 -
 include/linux/blk_types.h             |    4 
 include/linux/genhd.h                 |    6 
 init/do_mounts.c                      |   10 -
 17 files changed, 279 insertions(+), 325 deletions(-)