Merge tag 'md-next-20231208' of https://git.kernel.org/pub/scm/linux/kernel/git/song...

Pull MD updates from Song:

"1. Fix/Cleanup RCU usage from conf->disks[i].rdev, by Yu Kuai;
 2. Fix raid5 hang issue, by Junxiao Bi;
 3. Add Yu Kuai as Reviewer of the md subsystem."

* tag 'md-next-20231208' of https://git.kernel.org/pub/scm/linux/kernel/git/song/md:
  md: synchronize flush io with array reconfiguration
  MAINTAINERS: SOFTWARE RAID: Add Yu Kuai as Reviewer
  md/md-multipath: remove rcu protection to access rdev from conf
  md/raid5: remove rcu protection to access rdev from conf
  md/raid1: remove rcu protection to access rdev from conf
  md/raid10: remove rcu protection to access rdev from conf
  md: remove flag RemoveSynchronized
  Revert "md/raid5: Wait for MD_SB_CHANGE_PENDING in raid5d"
  md: bypass block throttle for superblock update