+ linux-rdma@vger.kernel.org
On Mon, 6 Oct 2025 at 17:00, Naresh Kamboju naresh.kamboju@linaro.org wrote:
[Resending with typo correction in the subject next tag]
The arm64 defconfig builds failed on the Linux next-20251002 tag build due to following build warnings / errors with gcc-8 toolchain.
- arm64, build
- gcc-8-defconfig
First seen on next-20251002 Good: next-20250929 Bad: next-20251002..next-20251003
Regression Analysis:
- New regression? yes
- Reproducibility? yes
Build regression: next-20251002: arm64: gcc-8-defconfig: Assembler messages: Error: unknown architectural extension `simd;'
Reported-by: Linux Kernel Functional Testing lkft@linaro.org
### 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
## Build
- Build log: https://storage.tuxsuite.com/public/linaro/lkft/builds/33YUHcFKTLSBTOxNIJqF9...
- Build details:
https://regressions.linaro.org/lkft/linux-next-master/next-20251003/build/gc...
- Build plan: https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/builds/33YUHcFKTL...
- Build link: https://storage.tuxsuite.com/public/linaro/lkft/builds/33YUHcFKTLSBTOxNIJqF9...
- Kernel config:
https://storage.tuxsuite.com/public/linaro/lkft/builds/33YUHcFKTLSBTOxNIJqF9...
## Steps to reproduce
- tuxmake --runtime podman --target-arch arm64 --toolchain gcc-8
--kconfig defconfig
-- Linaro LKFT