Merge tag 'md-6.9-20240305' of https://git.kernel.org/pub/scm/linux/kernel/git/song...

Pull MD fixes from Song:

"This set fixes two issues:

 1. dmraid regression since 6.7 kernels. This issue was initially
    reported in [1]. This set of fix has been reviewed and tested by
    md and dm folks.

 2. raid5 hang since 6.7 kernel, reported in [2]. We haven't got a
    better fix for this issue yet. This revert is a workaround. It has
    been applied to 6.7 stable kernels [3], and proved to be affective.
    We will look more into this issue for a better fix.

 [1] https://lore.kernel.org/linux-raid/e5e8afe2-e9a8-49a2-5ab0-958d4065c55e@redhat.com/
 [2] https://lore.kernel.org/linux-raid/20240123005700.9302-1-dan@danm.net/
 [3] 87165c64fe1a in linux-6.7.y branch."

* tag 'md-6.9-20240305' of https://git.kernel.org/pub/scm/linux/kernel/git/song/md:
  dm-raid: fix lockdep waring in "pers->hot_add_disk"
  dm-raid456, md/raid456: fix a deadlock for dm-raid456 while io concurrent with reshape
  dm-raid: add a new helper prepare_suspend() in md_personality
  md/dm-raid: don't call md_reap_sync_thread() directly
  dm-raid: really frozen sync_thread during suspend
  md: add a new helper reshape_interrupted()
  md: export helper md_is_rdwr()
  md: export helpers to stop sync_thread
  md: don't clear MD_RECOVERY_FROZEN for new dm-raid until resume
  Revert "Revert "md/raid5: Wait for MD_SB_CHANGE_PENDING in raid5d""