From 240f3905f513cd5f27cc3f79bf03bf3f88323f41 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Wed, 5 Feb 2014 12:14:11 -0500
Subject: [PATCH] process_vm_access: switch to
 copy_page_to_iter/iov_iter_copy_from_user

... rather than open-coding those.  As a side benefit, we get much saner
loop calling those; we can just feed entire pages, instead of the "copy
would span the iovec boundary, let's do it in two loop iterations" mess.

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