Merge tag 'md/4.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md

Merge tag 'md/4.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md

Pull MD fixes from Shaohua Li:
 "Several patches for MD. One notable is making flush bios sync, others
  fix small issues"

* tag 'md/4.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md:
  md: Make flush bios explicitely sync
  md: report sector of stripes with check mismatches
  md: uuid debug statement now in processor byte order.
  md-cluster: fix potential lock issue in add_new_disk