Merge branch 'uek4/xsa155' of git://ca-git.us.oracle.com/linux-konrad-public into...

Merge branch 'uek4/xsa155' of git://ca-git.us.oracle.com/linux-konrad-public into topic/uek-4.1/xen

* 'uek4/xsa155' of git://ca-git.us.oracle.com/linux-konrad-public:
  xen/pciback: Save xen_pci_op commands before processing it
  xen-scsiback: safely copy requests
  xen-blkback: read from indirect descriptors only once
  xen-blkback: only read request operation from shared ring once
  xen-netback: use RING_COPY_REQUEST() throughout
  xen-netback: don't use last request to determine minimum Tx credit
  xen: Add RING_COPY_REQUEST()