linux-kernel - Re: [PATCH v3] arm64: sysreg: make mrs_s and msr

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Date:   Tue, 23 Apr 2019 15:55:07 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Catalin Marinas <catalin.marinas@....com>
Cc:     Will Deacon <will.deacon@....com>,
        Alex Matveev <alxmtvv@...il.com>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Yury Norov <ynorov@...iumnetworks.com>,
        Matthias Kaehlcke <mka@...omium.org>,
        Sami Tolvanen <samitolvanen@...gle.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3] arm64: sysreg: make mrs_s and msr_s macros work with
 Clang and LTO

On Mon, Apr 15, 2019 at 7:38 AM Kees Cook <keescook@...omium.org> wrote:
> +#define __msr_s(r, v)                                          \
> +       DEFINE_MSR_S                                            \
> +"      msr_s " __stringify(r) ", %x0\n"                        \
> +       UNDEFINE_MSR_S : : "rZ" (v)

BTW ... is "%x0" a typo here? Shouldn't this just be "%0"?

-- 
Kees Cook