linux-kernel - Re: [PATCH v4 mips-next 2/7] MIPS: vmlinux.lds.S: add ".gnu.attributes" to DISCARDS

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Message-ID: <20210108211207.GB2547542@ubuntu-m3-large-x86>
Date:   Fri, 8 Jan 2021 14:12:07 -0700
From:   Nathan Chancellor <natechancellor@...il.com>
To:     Alexander Lobakin <alobakin@...me>
Cc:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Arnd Bergmann <arnd@...db.de>,
        Kees Cook <keescook@...omium.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Fangrui Song <maskray@...gle.com>,
        Huacai Chen <chenhuacai@...nel.org>,
        Pei Huang <huangpei@...ngson.cn>,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        Sami Tolvanen <samitolvanen@...gle.com>,
        Ingo Molnar <mingo@...nel.org>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Corey Minyard <cminyard@...sta.com>,
        linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arch@...r.kernel.org, stable@...r.kernel.org,
        clang-built-linux@...glegroups.com
Subject: Re: [PATCH v4 mips-next 2/7] MIPS: vmlinux.lds.S: add
 ".gnu.attributes" to DISCARDS

On Thu, Jan 07, 2021 at 12:34:53PM +0000, Alexander Lobakin wrote:
> Discard GNU attributes (MIPS FP type, GNU Hash etc.) at link time
> as kernel doesn't use it at all.
> Solves a dozen of the following ld warnings (one per every file):
> 
> mips-alpine-linux-musl-ld: warning: orphan section `.gnu.attributes'
> from `arch/mips/kernel/head.o' being placed in section
> `.gnu.attributes'
> mips-alpine-linux-musl-ld: warning: orphan section `.gnu.attributes'
> from `init/main.o' being placed in section `.gnu.attributes'
> 
> Signed-off-by: Alexander Lobakin <alobakin@...me>

Reviewed-by: Nathan Chancellor <natechancellor@...il.com>

> ---
>  arch/mips/kernel/vmlinux.lds.S | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/mips/kernel/vmlinux.lds.S b/arch/mips/kernel/vmlinux.lds.S
> index 83e27a181206..16468957cba2 100644
> --- a/arch/mips/kernel/vmlinux.lds.S
> +++ b/arch/mips/kernel/vmlinux.lds.S
> @@ -221,6 +221,7 @@ SECTIONS
>  		/* ABI crap starts here */
>  		*(.MIPS.abiflags)
>  		*(.MIPS.options)
> +		*(.gnu.attributes)
>  		*(.options)
>  		*(.pdr)
>  		*(.reginfo)
> -- 
> 2.30.0
> 
>