[git pull] splice fixups

[Al Viro <viro@ZenIV.linux.org.uk>]

	A couple of fixups for interaction of pipe-backed iov_iter with
O_DIRECT reads + constification of a couple of primitives in uio.h missed
by previous rounds.  Kudos to davej - his fuzzing has caught those bugs.

	One conflict in mm/filemap.c, resolved in an obvious way.

The following changes since commit a949e63992469fed87aef197347960ced31701b8:

  pipe: fix comment in pipe_buf_operations (2016-10-05 18:24:00 -0400)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git work.splice_read

for you to fetch changes up to cd27e455042da85b088bdd3a6e00da1d5b4df9f1:

  [btrfs] fix check_direct_IO() for non-iovec iterators (2016-10-10 13:58:16 -0400)

----------------------------------------------------------------
Al Viro (3):
      fix ITER_PIPE interaction with direct_IO
      constify iov_iter_count() and iter_is_iovec()
      [btrfs] fix check_direct_IO() for non-iovec iterators

 fs/btrfs/inode.c    |  2 +-
 fs/splice.c         | 12 +++---------
 fs/xfs/xfs_file.c   |  2 +-
 include/linux/uio.h |  4 ++--
 mm/filemap.c        |  2 +-
 5 files changed, 8 insertions(+), 14 deletions(-)