Merge branch 'md-next' of https://github.com/liu-song-6/linux into for-5.2/block

Pull MD changes from Song.

* 'md-next' of https://github.com/liu-song-6/linux:
  md: add __acquires/__releases annotations to handle_active_stripes
  md: add __acquires/__releases annotations to (un)lock_two_stripes
  md: mark md_cluster_mod static
  md: use correct type in super_1_sync
  md: use correct type in super_1_load
  md: use correct types in md_bitmap_print_sb
  md: add a missing endianness conversion in check_sb_changes
  md: add mddev->pers to avoid potential NULL pointer dereference