linux-kernel - Re: [PATCHv3 06/11] asm-generic: mm_hooks: allow hooks to be overridden individually

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Date:   Wed, 18 Apr 2018 12:38:16 +0100
From:   Mark Rutland <mark.rutland@....com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Catalin Marinas <catalin.marinas@....com>, cdall@...nel.org,
        drjones@...hat.com, kvmarm@...ts.cs.columbia.edu,
        linux-arch <linux-arch@...r.kernel.org>,
        Marc Zyngier <marc.zyngier@....com>,
        Ramana Radhakrishnan <ramana.radhakrishnan@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Will Deacon <will.deacon@....com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Adam Wallis <awallis@...eaurora.org>,
        Kernel Hardening <kernel-hardening@...ts.openwall.com>
Subject: Re: [PATCHv3 06/11] asm-generic: mm_hooks: allow hooks to be
 overridden individually

On Tue, Apr 17, 2018 at 09:56:02PM +0200, Arnd Bergmann wrote:
> On Tue, Apr 17, 2018 at 8:37 PM, Mark Rutland <mark.rutland@....com> wrote:
> > Currently, an architecture must either implement all of the mm hooks
> > itself, or use all of those provided by the asm-generic implementation.
> > When an architecture only needs to override a single hook, it must copy
> > the stub implementations from the asm-generic version.
> >
> > To avoid this repetition, allow each hook to be overridden indiviually,
> > by placing each under an #ifndef block. As architectures providing their
> > own hooks can't include this file today, this shouldn't adversely affect
> > any existing hooks.
> >
> > Signed-off-by: Mark Rutland <mark.rutland@....com>
> > Cc: Arnd Bergmann <arnd@...db.de>
> > Cc: linux-arch@...r.kernel.org
> 
> Acked-by: Arnd Bergmann <arnd@...db.de>

Cheers!

Mark.