linux-kernel - Re: [PATCH] arm64: remove special treatment for the link order of head.o

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Message-ID: <Y0hF4XfsgKxevNzj@fjasle.eu>
Date:   Thu, 13 Oct 2022 19:07:45 +0200
From:   Nicolas Schier <nicolas@...sle.eu>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-arch@...r.kernel.org,
        Ard Biesheuvel <ardb@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: remove special treatment for the link order of
 head.o

On Thu, Oct 13, 2022 at 08:35:00AM +0900, Masahiro Yamada wrote:
> Date: Thu, 13 Oct 2022 08:35:00 +0900
> From: Masahiro Yamada <masahiroy@...nel.org>
> To: Catalin Marinas <catalin.marinas@....com>, Will Deacon
>  <will@...nel.org>, linux-arm-kernel@...ts.infradead.org
> Cc: linux-arch@...r.kernel.org, Ard Biesheuvel <ardb@...nel.org>, Masahiro
>  Yamada <masahiroy@...nel.org>, Nicolas Schier <nicolas@...sle.eu>,
>  linux-kernel@...r.kernel.org
> Subject: [PATCH] arm64: remove special treatment for the link order of
>  head.o
> Message-Id: <20221012233500.156764-1-masahiroy@...nel.org>
> X-Mailer: git-send-email 2.34.1
> 
> In the previous discussion (see the Link tag), Ard pointed out that
> arm/arm64/kernel/head.o does not need any special treatment - the only
> piece that must appear right at the start of the binary image is the
> image header which is emitted into .head.text.
> 
> The linker script does the right thing to do. The build system does
> not need to manipulate the link order of head.o.
> 
> Link: https://lore.kernel.org/lkml/CAMj1kXH77Ja8bSsq2Qj8Ck9iSZKw=1F8Uy-uAWGVDm4-CG=EuA@mail.gmail.com/
> Suggested-by: Ard Biesheuvel <ardb@...nel.org>
> Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
> ---

Reviewed-by: Nicolas Schier <nicolas@...sle.eu>

>  scripts/head-object-list.txt | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/scripts/head-object-list.txt b/scripts/head-object-list.txt
> index b16326a92c45..f226e45e3b7b 100644
> --- a/scripts/head-object-list.txt
> +++ b/scripts/head-object-list.txt
> @@ -15,7 +15,6 @@ arch/alpha/kernel/head.o
>  arch/arc/kernel/head.o
>  arch/arm/kernel/head-nommu.o
>  arch/arm/kernel/head.o
> -arch/arm64/kernel/head.o
>  arch/csky/kernel/head.o
>  arch/hexagon/kernel/head.o
>  arch/ia64/kernel/head.o
> -- 
> 2.34.1

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