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

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Message-ID: <CANpmjNPmZv6TBQJ93TRuxCxJCpvJy8+XS5u9+ucOE2eEebEw9Q@mail.gmail.com>
Date:   Thu, 14 May 2020 15:07:08 +0200
From:   Marco Elver <elver@...gle.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Will Deacon <will@...nel.org>, LKML <linux-kernel@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        "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

On Thu, 14 May 2020 at 14:27, Peter Zijlstra <peterz@...radead.org> wrote:
>
> On Thu, May 14, 2020 at 01:01:04PM +0100, Will Deacon wrote:
>
> > > +#if __has_feature(undefined_sanitizer)
> >
> > Hmm, this might want to be __has_feature(undefined_behavior_sanitizer)
> > (and damn is that hard for a Brit to type out!)
>
> (I know right, it should be behaviour, dammit!)
>
> I tried without the condition, eg.:
>
> +#define __no_sanitize_undefined \
> +               __attribute__((no_sanitize("undefined")))
>
> and it still generated UBSAN gunk.

Which ubsan calls are left? I'm trying to reproduce.

Thanks,
-- Marco