linux-kernel - Re: [PATCH v5 00/18] Rework READ

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Message-ID: <875zcyzh6r.fsf@nanos.tec.linutronix.de>
Date:   Thu, 14 May 2020 17:09:48 +0200
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Peter Zijlstra <peterz@...radead.org>,
        Marco Elver <elver@...gle.com>
Cc:     Will Deacon <will@...nel.org>,
        kasan-dev <kasan-dev@...glegroups.com>,
        LKML <linux-kernel@...r.kernel.org>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Dmitry Vyukov <dvyukov@...gle.com>
Subject: Re: [PATCH v5 00/18] Rework READ_ONCE() to improve codegen

Peter Zijlstra <peterz@...radead.org> writes:
> On Thu, May 14, 2020 at 03:35:58PM +0200, Marco Elver wrote:
>> Any preferences?
>
> I suppose DTRT, if we then write the Makefile rule like:
>
> KCSAN_SANITIZE := KCSAN_FUNCTION_ATTRIBUTES
>
> and set that to either 'y'/'n' depending on the compiler at hand
> supporting enough magic to make it all work.
>
> I suppose all the sanitize stuff is most important for developers and
> we tend to have the latest compiler versions anyway, right?

Developers and CI/testing stuff. Yes we really should require a sane
compiler instead of introducing boatloads of horrible workarounds all
over the place which then break when the code changes slightly.

Thanks,

        tglx