linux-kernel - Re: [PATCHv5 4/4] arm64: Add build salt to the vDSO

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Message-ID: <20180704173615.GC9668@arm.com>
Date:   Wed, 4 Jul 2018 18:36:15 +0100
From:   Will Deacon <will.deacon@....com>
To:     Laura Abbott <labbott@...hat.com>
Cc:     mjw@...oraproject.org, "H . J . Lu" <hjl.tools@...il.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Andy Lutomirski <luto@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        X86 ML <x86@...nel.org>, linux-kernel@...r.kernel.org,
        Nick Clifton <nickc@...hat.com>,
        Cary Coutant <ccoutant@...il.com>,
        linux-kbuild@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        Michael Ellerman <mpe@...erman.id.au>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCHv5 4/4] arm64: Add build salt to the vDSO

On Tue, Jul 03, 2018 at 04:34:30PM -0700, Laura Abbott wrote:
> 
> The vDSO needs to have a unique build id in a similar manner
> to the kernel and modules. Use the build salt macro.
> 
> Signed-off-by: Laura Abbott <labbott@...hat.com>
> ---
> v5: I was previously focused on x86 only but since powerpc gave a patch,
> I figured I would do arm64 since the changes were also fairly simple.
> ---
>  arch/arm64/kernel/vdso/note.S | 3 +++
>  1 file changed, 3 insertions(+)

If you drop the trailing semicolon, then:

Acked-by: Will Deacon <will.deacon@....com>

Will

> diff --git a/arch/arm64/kernel/vdso/note.S b/arch/arm64/kernel/vdso/note.S
> index b82c85e5d972..2c429dfd3f45 100644
> --- a/arch/arm64/kernel/vdso/note.S
> +++ b/arch/arm64/kernel/vdso/note.S
> @@ -22,7 +22,10 @@
>  #include <linux/uts.h>
>  #include <linux/version.h>
>  #include <linux/elfnote.h>
> +#include <linux/build-salt.h>
>  
>  ELFNOTE_START(Linux, 0, "a")
>  	.long LINUX_VERSION_CODE
>  ELFNOTE_END
> +
> +BUILD_SALT;
> -- 
> 2.17.1
>