From ac15ac0669d5f5ce7fddec0d9cf3721c42d77a2c Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Fri, 20 Mar 2015 20:10:21 -0400
Subject: [PATCH] lift iov_iter into {compat_,}do_readv_writev()

get it closer to matching {compat_,}rw_copy_check_uvector().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Reading git-format-patch failed