Date: Fri, 31 Mar 2017 14:38:17 +0100
From: James Hogan <james.hogan@imgtec.com>
To: Kees Cook <keescook@chromium.org>
CC: Al Viro <viro@zeniv.linux.org.uk>,
        linux-arch <linux-arch@vger.kernel.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Richard Henderson <rth@twiddle.net>,
        Russell King <linux@armlinux.org.uk>,
        Will Deacon <will.deacon@arm.com>,
        Haavard Skinnemoen <hskinnemoen@gmail.com>,
        Vineet Gupta <vgupta@synopsys.com>, Steven Miao <realmz6@gmail.com>,
        Jesper Nilsson <jesper.nilsson@axis.com>,
        Mark Salter <msalter@redhat.com>,
        Yoshinori Sato <ysato@users.sourceforge.jp>,
        Richard Kuo <rkuo@codeaurora.org>, Tony Luck <tony.luck@intel.com>,
        Geert Uytterhoeven <geert@linux-m68k.org>,
        Michal Simek <monstr@monstr.eu>, David Howells <dhowells@redhat.com>,
        Ley Foon Tan <lftan@altera.com>, Jonas Bonn <jonas@southpole.se>,
        Helge Deller <deller@gmx.de>,
        Martin Schwidefsky <schwidefsky@de.ibm.com>,
        Ralf Baechle <ralf@linux-mips.org>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Chen Liqin <liqin.linux@gmail.com>,
        "David S. Miller" <davem@davemloft.net>,
        Chris Metcalf <cmetcalf@mellanox.com>,
        Richard Weinberger <richard@nod.at>, Guan Xuetao <gxt@mprc.pku.edu.cn>,
        Thomas Gleixner <tglx@linutronix.de>, Chris Zankel <chris@zankel.net>
Subject: Re: [RFC][CFT][PATCHSET v1] uaccess unification
Message-ID: <20170331133817.GH31606@jhogan-linux.le.imgtec.org>
References: <20170329055706.GH29622@ZenIV.linux.org.uk>
 <CAGXu5j+R1gNpuUv1=795t7PGwyLznVCGrRovy5ZXb69SmA0NJA@mail.gmail.com>
MIME-Version: 1.0
Content-Type: multipart/signed; micalg=pgp-sha256;
        protocol="application/pgp-signature"; boundary="6S+CllbbV/7E5K18"
Content-Disposition: inline
In-Reply-To: <CAGXu5j+R1gNpuUv1=795t7PGwyLznVCGrRovy5ZXb69SmA0NJA@mail.gmail.com>
User-Agent: Mutt/1.5.24 (2015-08-30)
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1790
Lines: 47

--6S+CllbbV/7E5K18
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

On Thu, Mar 30, 2017 at 05:21:32PM -0700, Kees Cook wrote:
> On Tue, Mar 28, 2017 at 10:57 PM, Al Viro <viro@zeniv.linux.org.uk> wrote:
> > At the moment I have that conversion done for everything except ia64 and
> > metag.  Once everything is converted, I'll remove ARCH_HAS_RAW_COPY_USER
> > and make generic stuff unconditional; at the same point
> > HAVE_ARCH_HARDENED_USERCOPY will be gone (becoming unconditionally true=
).
>=20
> Yay! :)

In the mean time should ARCH_HAS_RAW_COPY_USER select
HAVE_ARCH_HARDENED_USERCOPY?

FWIW I already have patches for metag to enable RAW_COPY_USER that just
need some more testing (mainly due to prerequisite user copy fixes), but
I don't know about ia64

Cheers
James

--6S+CllbbV/7E5K18
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: Digital signature

-----BEGIN PGP SIGNATURE-----
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=f3v1
-----END PGP SIGNATURE-----

--6S+CllbbV/7E5K18--