Merge tag 'md/4.12-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md

Pull MD bugfix from Shaohua Li:
 "One bug fix from Neil Brown for MD. The bug was introduced in this
  cycle"

* tag 'md/4.12-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md:
  md: initialise ->writes_pending in personality modules.