vfs.git, part 5: iov_iter infrastructure work

A couple of iov_iter updates. Please, pull from

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

Shortlog:
Al Viro (2):
iov_iter: constify {csum_and_,}copy_to_iter()
iov_iter: export import_single_range()

Diffstat:

 include/linux/uio.h |  4 ++--
 lib/iov_iter.c      | 11 ++++++-----
 2 files changed, 8 insertions(+), 7 deletions(-)