[GIT PULL] MD update for 4.9-rc3

Hi Linus, Please pull MD changes for 4.9-rc3. There are several bug fixes queued: - Fix raid5-cache recovery bugs - Fix discard IO error handling for raid1/10 - Fix array sync writes bogus position to superblock - Fix IO error handling for raid array with external metadata Thanks, Shaohua The

[GIT PULL] MD update for 4.9-rc3

Hi Linus, Please pull MD changes for 4.9-rc3. There are several bug fixes queued: - Fix raid5-cache recovery bugs - Fix discard IO error handling for raid1/10 - Fix array sync writes bogus position to superblock - Fix IO error handling for raid array with external metadata Thanks, Shaohua The