Merge tag 'md-6.16-20250513' of https://git.kernel.org/pub/scm/linux/kernel/git/mdrai...

Merge tag 'md-6.16-20250513' of https://git./linux/kernel/git/mdraid/linux into for-6.16/block

Pull MD changes from Yu Kuai:

- Fix that normal IO can be starved by sync IO, found by mkfs on newly
  created large raid5, with some clean up patches for bdev inflight
  counters.

* tag 'md-6.16-20250513' of https://git.kernel.org/pub/scm/linux/kernel/git/mdraid/linux:
  md: clean up accounting for issued sync IO
  md: fix is_mddev_idle()
  md: add a new api sync_io_depth
  md: record dm-raid gendisk in mddev
  block: export API to get the number of bdev inflight IO
  block: clean up blk_mq_in_flight_rw()
  block: WARN if bdev inflight counter is negative
  block: reuse part_in_flight_rw for part_in_flight
  blk-mq: remove blk_mq_in_flight()