Merge branch 'for-5.8/block' into for-next

Merge branch 'for-5.8/block' into for-next

* for-5.8/block:
  zonefs: use REQ_OP_ZONE_APPEND for sync DIO
  block: export bio_release_pages and bio_iov_iter_get_pages
  null_blk: Support REQ_OP_ZONE_APPEND
  scsi: sd_zbc: emulate ZONE_APPEND commands
  scsi: sd_zbc: factor out sanity checks for zoned commands
  block: Modify revalidate zones
  block: introduce blk_req_zone_write_trylock
  block: Introduce REQ_OP_ZONE_APPEND
  block: rename __bio_add_pc_page to bio_add_hw_page
  block: provide fallbacks for blk_queue_zone_is_seq and blk_queue_zone_no