[PATCH v2 0/2] Introduce bdev_zone_is_seq()

[Damien Le Moal <dlemoal@kernel.org>]

Allow file systems to safely access a block device gendisk bitmap of
conventional zones to determine a zone type by:
1) Patch 1 - changing the gendisk conv_zones_bitmap to be RCU protected
2) Patch 2 - Introducing the helper function bdev_zone_is_seq()

This is in preparation for use in btrfs to remove the btrfs-managed
bitmap of conventional zones and in zoned support for xfs.

Changes from v1:
 - Use rcu_dereference() in disk_zone_is_conv() (patch 1) and rebase
   patch 2, as suggested by Christoph.

Damien Le Moal (2):
  block: RCU protect disk->conv_zones_bitmap
  block: Add a public bdev_zone_is_seq() helper

 block/blk-zoned.c      | 42 ++++++++++++++++++++++++------------------
 include/linux/blkdev.h | 29 ++++++++++++++++++++++++++++-
 2 files changed, 52 insertions(+), 19 deletions(-)

-- 
2.47.0