linux-kernel - Re: [PATCHv2 02/14] fork: allow arch-override of VMAP stack alignment

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Date:   Tue, 15 Aug 2017 17:39:55 +0100
From:   Mark Rutland <mark.rutland@....com>
To:     Andy Lutomirski <luto@...capital.net>
Cc:     "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Catalin Marinas <catalin.marinas@....com>,
        James Morse <james.morse@....com>,
        Laura Abbott <labbott@...hat.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Matt Fleming <matt@...eblueprint.co.uk>,
        Will Deacon <will.deacon@....com>,
        "kernel-hardening@...ts.openwall.com" 
        <kernel-hardening@...ts.openwall.com>,
        Kees Cook <keescook@...omium.org>
Subject: Re: [PATCHv2 02/14] fork: allow arch-override of VMAP stack alignment

On Tue, Aug 15, 2017 at 09:33:18AM -0700, Andy Lutomirski wrote:
> On Tue, Aug 15, 2017 at 9:30 AM, Mark Rutland <mark.rutland@....com> wrote:
> > On Tue, Aug 15, 2017 at 09:09:36AM -0700, Andy Lutomirski wrote:

> >> This looks okay, but it might make sense to move that to a header file
> >> so THREAD_ALIGN is always available.
> >
> > I was a little worried about breaking things, since arches don't define
> > THREAD_SIZE in a consistent location.
> >
> > Looking again, it looks like those are all transitiviely included into
> > each arch's <asm/thread_info.h>, so I think I can move this into
> > <linux/thread_info.h>, which'll have to be added to kernel.fork.c's
> > includes.
> >
> > Are you happy with the below fixup?
> 
> LGTM.

Cool. I've folded that in and pushed the updated branch.

Thanks,
Mark.