linux-kernel - Re: [PATCH] binfmt_elf: Extract .note.gnu.property from an ELF file

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Message-ID: <20190501213709.GD28500@bombadil.infradead.org>
Date:   Wed, 1 May 2019 14:37:09 -0700
From:   Matthew Wilcox <willy@...radead.org>
To:     Yu-cheng Yu <yu-cheng.yu@...el.com>
Cc:     x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-mm@...ck.org,
        linux-arch@...r.kernel.org, linux-api@...r.kernel.org,
        Arnd Bergmann <arnd@...db.de>,
        Andy Lutomirski <luto@...capital.net>,
        Balbir Singh <bsingharora@...il.com>,
        Cyrill Gorcunov <gorcunov@...il.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Eugene Syromiatnikov <esyr@...hat.com>,
        Florian Weimer <fweimer@...hat.com>,
        "H.J. Lu" <hjl.tools@...il.com>, Jann Horn <jannh@...gle.com>,
        Jonathan Corbet <corbet@....net>,
        Kees Cook <keescook@...omium.org>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Nadav Amit <nadav.amit@...il.com>,
        Oleg Nesterov <oleg@...hat.com>, Pavel Machek <pavel@....cz>,
        Peter Zijlstra <peterz@...radead.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        "Ravi V. Shankar" <ravi.v.shankar@...el.com>,
        Vedvyas Shanbhogue <vedvyas.shanbhogue@...el.com>,
        Dave Martin <Dave.Martin@....com>
Subject: Re: [PATCH] binfmt_elf: Extract .note.gnu.property from an ELF file

On Wed, May 01, 2019 at 02:12:17PM -0700, Yu-cheng Yu wrote:
> +++ b/fs/Kconfig.binfmt
> @@ -35,6 +35,10 @@ config COMPAT_BINFMT_ELF
>  config ARCH_BINFMT_ELF_STATE
>  	bool
>  
> +config ARCH_USE_GNU_PROPERTY
> +	bool
> +	depends on 64BIT

I don't think this is right.  I think you should get rid of the depends line
and instead select the symbol from each of argh64 and x86 Kconfig files.