next-20251002: arm64: gcc-8-defconfig: Assembler messages: Error: unknown architectural extension `simd;'

[Arnd Bergmann]

On Mon, Oct 6, 2025, at 13:31, Naresh Kamboju wrote:
> + linux-rdma at vger.kernel.org
>
> On Mon, 6 Oct 2025 at 17:00, Naresh Kamboju <naresh.kamboju at linaro.org> wrote:
>> ### Build error log
>> /tmp/cclfMnj9.s: Assembler messages:
>> /tmp/cclfMnj9.s:656: Error: unknown architectural extension `simd;'
>> make[8]: *** [scripts/Makefile.build:287:
>> drivers/net/ethernet/mellanox/mlx5/core/wc.o] Error 1
>>
>> Suspecting commit,
>> $ git blame -L 269 drivers/net/ethernet/mellanox/mlx5/core/wc.c
>> fd8c8216648cd8 (Patrisious Haddad 2025-09-29 00:08:08 +0300 269)
>>          (".arch_extension simd;\n\t"
>> fd8c8216648cd net/mlx5: Improve write-combining test reliability for
>> ARM64 Grace CPUs
>>
>> ## Source
>> * Kernel version: 6.17.0
>> * Git tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/next/linux-next.git
>> * Git commit: 47a8d4b89844f5974f634b4189a39d5ccbacd81c
>> * Architectures: arm64
>> * Toolchains: gcc-8
>> * Kconfigs: defconfig
>>

Nathan already analyzed the problem and suggested a fix, but I could
not find a patch on the mailing list so far and sent his suggestion
now. Please check

https://lore.kernel.org/all/20251006115640.497169-1-arnd@kernel.org/

    Arnd