Merge tag 'pull-iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull iov_iter updates from Al Viro:
 "iov_iter work; most of that is about getting rid of direction
  misannotations and (hopefully) preventing more of the same for the
  future"

* tag 'pull-iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  use less confusing names for iov_iter direction initializers
  iov_iter: saner checks for attempt to copy to/from iterator
  [xen] fix "direction" argument of iov_iter_kvec()
  [vhost] fix 'direction' argument of iov_iter_{init,bvec}()
  [target] fix iov_iter_bvec() "direction" argument
  [s390] memcpy_real(): WRITE is "data source", not destination...
  [s390] zcore: WRITE is "data source", not destination...
  [infiniband] READ is "data destination", not source...
  [fsi] WRITE is "data source", not destination...
  [s390] copy_oldmem_kernel() - WRITE is "data source", not destination
  csum_and_copy_to_iter(): handle ITER_DISCARD
  get rid of unlikely() on page_copy_sane() calls

diff --cc arch/s390/kernel/crash_dump.c
Simple merge

diff --cc crypto/testmgr.c
Simple merge

diff --cc drivers/acpi/pfr_update.c
Simple merge

diff --cc drivers/block/drbd/drbd_receiver.c
Simple merge

diff --cc drivers/char/random.c
Simple merge

diff --cc drivers/infiniband/ulp/rtrs/rtrs-clt.c
Simple merge

diff --cc drivers/s390/char/zcore.c
Simple merge

diff --cc fs/btrfs/ioctl.c
Simple merge

diff --cc fs/cifs/file.c
Simple merge

diff --cc fs/coredump.c
Simple merge

diff --cc fs/nfsd/vfs.c
Simple merge

diff --cc fs/ocfs2/cluster/tcp.c
Simple merge

diff --cc fs/proc/vmcore.c
Simple merge

diff --cc fs/read_write.c
Simple merge

diff --cc kernel/trace/trace_events_user.c
Simple merge

diff --cc mm/madvise.c
Simple merge

diff --cc net/bluetooth/6lowpan.c
Simple merge

diff --cc net/ipv4/tcp.c
Simple merge

diff --cc net/sunrpc/xprtsock.c
Simple merge

diff --cc net/tipc/topsrv.c
Simple merge