tree 1a6d775a568d477089b85690160f11b07a812180
parent ac15ac0669d5f5ce7fddec0d9cf3721c42d77a2c
author Al Viro <viro@zeniv.linux.org.uk> 1426897052 -0400
committer Al Viro <viro@zeniv.linux.org.uk> 1428805605 -0400

aio: lift iov_iter_init() into aio_setup_..._rw()

the only non-trivial detail is that we do it before rw_verify_area(),
so we'd better cap the length ourselves in aio_setup_single_rw()
case (for vectored case rw_copy_check_uvector() will do that for us).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>