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Date:   Wed, 6 Mar 2019 15:12:37 +0100
From:   Peter Zijlstra <>
To:     Dmitry Vyukov <>
Cc:     Linus Torvalds <>,
        Thomas Gleixner <>,
        "H. Peter Anvin" <>,
        Julien Thierry <>,
        Will Deacon <>,
        Andy Lutomirski <>,
        Ingo Molnar <>,
        Catalin Marinas <>,
        James Morse <>,,
        Brian Gerst <>,
        Josh Poimboeuf <>,
        Andy Lutomirski <>,
        Borislav Petkov <>,
        Denys Vlasenko <>,
        LKML <>,
        Andrey Ryabinin <>
Subject: Re: [PATCH 1/8] kasan,x86: Frob kasan_report() in an exception

On Wed, Mar 06, 2019 at 03:01:33PM +0100, Dmitry Vyukov wrote:
> On Wed, Mar 6, 2019 at 2:57 PM Peter Zijlstra <> wrote:

> > I've not found callers of __asan_report_load* with AC=1 in the kernel
> > yet. Under what condtions does GCC emit calls to these functions?
> Then compiler inlines fast path into generated code and only calls
> into runtime to report errors (also, faster, this should be a default
> for anything other than tiny ROM controllers).

*sigh*, clearly I've not build enough kernels yet... Lemme go try that.

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