bio_map_user_iov(): switch to iov_iter_get_pages()/iov_iter_advance()

... and to hell with iov_for_each() nonsense

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2017-09-23 16:08:57 -04:00
commit 076098e51b