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From:   "Jason A. Donenfeld" <Jason@zx2c4.com>
Date:   Fri, 5 Oct 2018 19:37:44 +0200
Message-ID: <CAHmME9pgJ_2GGDUVsbQXcNRfh3yACqFG+5uemFRMZkb8LdH95g@mail.gmail.com>
Subject: Re: [RFC PATCH 1/9] kernel: add support for patchable function pointers
To:     Andrew Lutomirski <luto@kernel.org>
Cc:     Ard Biesheuvel <ard.biesheuvel@linaro.org>,
        Peter Zijlstra <peterz@infradead.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Eric Biggers <ebiggers@kernel.org>,
        Samuel Neves <sneves@dei.uc.pt>, Arnd Bergmann <arnd@arndb.de>,
        Herbert Xu <herbert@gondor.apana.org.au>,
        David Miller <davem@davemloft.net>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will.deacon@arm.com>, benh@kernel.crashing.org,
        paulus@samba.org, Michael Ellerman <mpe@ellerman.id.au>,
        Thomas Gleixner <tglx@linutronix.de>, mingo@redhat.com,
        Kees Cook <keescook@chromium.org>,
        "Martin K. Petersen" <martin.petersen@oracle.com>,
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On Fri, Oct 5, 2018 at 7:29 PM Andy Lutomirski <luto@kernel.org> wrote:
> (None of this is to say that I disagree with Jason, though -- I'm not
> entirely convinced that this makes sense for Zinc.  But maybe it can
> be done in a way that makes everyone happy.)

Zinc indeed will continue to push in the simpler and more minimal
direction. Down the line I'm open to trying and benching a few
different ways of going about it with dynamic patching -- something
that will be pretty easy to experiment with given the lean structure
of Zinc -- but for the initial merge I intend to do it the way it is,
which is super fast and pretty straightforward to follow.

Jason