linux-kernel - Re: [kbuild-all] Re: [PATCH v2 6/9] KVM: arm64: Detect and handle hypervisor stack overflows

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Message-ID: <CAMj1kXEfsxj44t13rpgNddvTeM3qgfv5zU_xpnxn7HV3xUN2YA@mail.gmail.com>
Date:   Fri, 25 Feb 2022 16:38:10 +0100
From:   Ard Biesheuvel <ardb@...nel.org>
To:     "Chen, Rong A" <rong.a.chen@...el.com>
Cc:     Marc Zyngier <maz@...nel.org>,
        Kalesh Singh <kaleshsingh@...gle.com>,
        kernel test robot <lkp@...el.com>, llvm@...ts.linux.dev,
        kbuild-all@...ts.01.org, Will Deacon <will@...nel.org>,
        Quentin Perret <qperret@...gle.com>,
        Fuad Tabba <tabba@...gle.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Android Kernel Team <kernel-team@...roid.com>,
        Catalin Marinas <catalin.marinas@....com>,
        James Morse <james.morse@....com>,
        Alexandru Elisei <alexandru.elisei@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Mark Rutland <mark.rutland@....com>,
        Pasha Tatashin <pasha.tatashin@...een.com>,
        Joey Gouly <joey.gouly@....com>,
        Peter Collingbourne <pcc@...gle.com>,
        Andrew Scull <ascull@...gle.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Zenghui Yu <yuzenghui@...wei.com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        kvmarm <kvmarm@...ts.cs.columbia.edu>
Subject: Re: [kbuild-all] Re: [PATCH v2 6/9] KVM: arm64: Detect and handle
 hypervisor stack overflows

On Fri, 25 Feb 2022 at 03:12, Chen, Rong A <rong.a.chen@...el.com> wrote:
>
>
>

> Hi Marc, Ard,
>
> We have ignored the warning related to asmlinkage according to the below
> advice:
>
> https://lore.kernel.org/lkml/CAMj1kXHrRYagSVniSetHdG15rkQS+fm4zVOtN=Zda3W0QaEoJA@mail.gmail.com/
>

Excellent! Thanks for implementing this - I wasn't aware that you
adopted this suggestion.

> do you want the bot ignore such warning if asmlinkage not specified?
>

Even though I think this warning has little value, I think asmlinkage
is sufficient for us to avoid it for symbols that are exported for use
by assembler code.

So I don't think this additional change is needed.

-- 
Ard.