md/4.1-rc4-fixes

md fixes for 4.1-rc4

- one serious RAID0 data corruption - caused by recent bugfix that wasn't
  reviewed properly.
- one raid5 fix in new code (a couple more of those to come).
- one little fix to stop static analysis complaining about silly rcu
  annotation.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2
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=jXKM
-----END PGP SIGNATURE-----