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From:   Masahiro Yamada <yamada.masahiro@socionext.com>
Date:   Thu, 16 May 2019 13:58:56 +0900
Message-ID: <CAK7LNASZnRrSsZSrnw41kintGfmpyj3iz-Vjduk7w3k9iSih-w@mail.gmail.com>
Subject: Re: [PATCH] arm64: vdso: Explicitly add build-id option
To:     Laura Abbott <labbott@redhat.com>
Cc:     Will Deacon <will.deacon@arm.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@lists.infradead.org>
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On Thu, May 16, 2019 at 4:51 AM Laura Abbott <labbott@redhat.com> wrote:
>
> Commit 691efbedc60d ("arm64: vdso: use $(LD) instead of $(CC) to
> link VDSO") switched to using LD explicitly. The --build-id option
> needs to be passed explicitly, similar to x86. Add this option.
>
> Fixes: 691efbedc60d ("arm64: vdso: use $(LD) instead of $(CC) to link VDSO")
> Signed-off-by: Laura Abbott <labbott@redhat.com>
> ---
>  arch/arm64/kernel/vdso/Makefile | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm64/kernel/vdso/Makefile b/arch/arm64/kernel/vdso/Makefile
> index 744b9dbaba03..ca209103cd06 100644
> --- a/arch/arm64/kernel/vdso/Makefile
> +++ b/arch/arm64/kernel/vdso/Makefile
> @@ -13,6 +13,7 @@ targets := $(obj-vdso) vdso.so vdso.so.dbg
>  obj-vdso := $(addprefix $(obj)/, $(obj-vdso))
>
>  ldflags-y := -shared -nostdlib -soname=linux-vdso.so.1 \
> +               $(call ld-option, --build-id) \
>                 $(call ld-option, --hash-style=sysv) -n -T
>
>  # Disable gcov profiling for VDSO code


I missed that. Sorry.

You can add  --build-id without $(call ld-option,...)
because it is supported by our minimal version of toolchain.

See commit log of 1e0221374e for example.


Otherwise, looks good to me.

Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>


--
Best Regards

Masahiro Yamada