IO fixes for 4.7-rc

Hi Linus,

Three small fixes that have been queued up and tested for this series. This pull request contains:

- A bug fix for xen-blkfront from Bob Liu, fixing an issue with incomplete requests during migration.

- A fix for an ancient issue in retrieving the IO priority of a different PID than self, preventing that task from going away while we access it. From Omar.

- A writeback fix from Tahsin, fixing a case where we'd call ihold() with a zero ref count inode.

Please pull!

git://git.kernel.dk/linux-block.git for-linus

----------------------------------------------------------------
Bob Liu (1):
xen-blkfront: save uncompleted reqs in blkfront_resume()

Jens Axboe (1):
Merge branch 'stable/for-jens-4.7' of git://git.kernel.org/.../konrad/xen into for-linus

Omar Sandoval (1):
block: fix use-after-free in sys_ioprio_get()

Tahsin Erdogan (1):
writeback: inode cgroup wb switch should not call ihold()

 block/ioprio.c               |  2 +
 drivers/block/xen-blkfront.c | 91 +++++++++++++++++++-------------------------
 fs/fs-writeback.c            |  2 +-
 3 files changed, 43 insertions(+), 52 deletions(-)

Jens Axboe