Merge branch 'uek4/4.5-xen-backport.v2' of git://ca-git.us.oracle.com/linux-dkiper...

* 'uek4/4.5-xen-backport.v2' of git://ca-git.us.oracle.com/linux-dkiper-public: (42 commits)
  xen: fix potential integer overflow in queue_reply
  xen/scsiback: avoid warnings when adding multiple LUNs to a domain
  xen/scsiback: correct frontend counting
  xen/blkfront: realloc ring info in blkif_resume
  xen-netfront: request Tx response events more often
  cleancache: constify cleancache_ops structure
  xen-netback: free queues after freeing the net device
  xen-netback: delete NAPI instance when queue fails to initialize
  xen-netback: use skb to determine number of required guest Rx requests
  xen/gntdev: add ioctl for grant copy
  xen/blkfront: Fix crash if backend doesn't follow the right states.
  xen/blkback: Fix two memory leaks.
  xen/blkback: make st_ statistics per ring
  xen/blkfront: Handle non-indirect grant with 64KB pages
  xen-blkfront: Introduce blkif_ring_get_request
  xen-blkback: clear PF_NOFREEZE for xen_blkif_schedule()
  xen/blkback: Free resources if connect_ring failed.
  xen/blocks: Return -EXX instead of -1
  xen/blkback: make pool of persistent grants and free pages per-queue
  xen/blkback: get the number of hardware queues/rings from blkfront
  ...

OraBug: 23268939 - Backport Linux v4.5 Linux Xen patches

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>