linux-kernel - Re: [PATCH] riscv: Explicitly specify the build id style in vDSO Makefile again

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Date:   Fri, 20 Nov 2020 16:14:09 -0800 (PST)
From:   Palmer Dabbelt <palmerdabbelt@...gle.com>
To:     natechancellor@...il.com
CC:     linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        clang-built-linux@...glegroups.com, natechancellor@...il.com
Subject:     Re: [PATCH] riscv: Explicitly specify the build id style in vDSO Makefile again

On Sun, 08 Nov 2020 12:37:37 PST (-0800), natechancellor@...il.com wrote:
> Commit a96843372331 ("kbuild: explicitly specify the build id style")
> explicitly set the build ID style to SHA1. Commit c2c81bb2f691 ("RISC-V:
> Fix the VDSO symbol generaton for binutils-2.35+") undid this change,
> likely unintentionally.
>
> Restore it so that the build ID style stays consistent across the tree
> regardless of linker.
>
> Fixes: c2c81bb2f691 ("RISC-V: Fix the VDSO symbol generaton for binutils-2.35+")
> Signed-off-by: Nathan Chancellor <natechancellor@...il.com>
> ---
>  arch/riscv/kernel/vdso/Makefile | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/riscv/kernel/vdso/Makefile b/arch/riscv/kernel/vdso/Makefile
> index cb8f9e4cfcbf..0cfd6da784f8 100644
> --- a/arch/riscv/kernel/vdso/Makefile
> +++ b/arch/riscv/kernel/vdso/Makefile
> @@ -44,7 +44,7 @@ SYSCFLAGS_vdso.so.dbg = $(c_flags)
>  $(obj)/vdso.so.dbg: $(src)/vdso.lds $(obj-vdso) FORCE
>  	$(call if_changed,vdsold)
>  SYSCFLAGS_vdso.so.dbg = -shared -s -Wl,-soname=linux-vdso.so.1 \
> -	-Wl,--build-id -Wl,--hash-style=both
> +	-Wl,--build-id=sha1 -Wl,--hash-style=both
>
>  # We also create a special relocatable object that should mirror the symbol
>  # table and layout of the linked DSO. With ld --just-symbols we can then
>
> base-commit: c2c81bb2f69138f902e1a58d3bef6ad97fb8a92c

Sorry about that.  This is on fixes.