Re: [PATCH net-next V2] net/mlx5: Improve write-combining test reliability for ARM64 Grace CPUs
From: kernel test robot
Date: Tue Sep 16 2025 - 01:46:10 EST
Hi Tariq,
kernel test robot noticed the following build errors:
[auto build test ERROR on 1f24a240974589ce42f70502ccb3ff3f5189d69a]
url: https://github.com/intel-lab-lkp/linux/commits/Tariq-Toukan/net-mlx5-Improve-write-combining-test-reliability-for-ARM64-Grace-CPUs/20250915-163901
base: 1f24a240974589ce42f70502ccb3ff3f5189d69a
patch link: https://lore.kernel.org/r/1757925308-614943-1-git-send-email-tariqt%40nvidia.com
patch subject: [PATCH net-next V2] net/mlx5: Improve write-combining test reliability for ARM64 Grace CPUs
config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20250916/202509161338.Kq88HUjH-lkp@xxxxxxxxx/config)
compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250916/202509161338.Kq88HUjH-lkp@xxxxxxxxx/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202509161338.Kq88HUjH-lkp@xxxxxxxxx/
All errors (new ones prefixed by >>):
>> drivers/net/ethernet/mellanox/mlx5/core/lib/wc_neon_iowrite64_copy.c:9:3: error: instruction requires: neon
9 | ("ld1 {v0.16b, v1.16b, v2.16b, v3.16b}, [%0]\n\t"
| ^
<inline asm>:1:2: note: instantiated into assembly here
1 | ld1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x19]
| ^
drivers/net/ethernet/mellanox/mlx5/core/lib/wc_neon_iowrite64_copy.c:9:48: error: instruction requires: neon
9 | ("ld1 {v0.16b, v1.16b, v2.16b, v3.16b}, [%0]\n\t"
| ^
<inline asm>:2:2: note: instantiated into assembly here
2 | st1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x20]
| ^
2 errors generated.
vim +9 drivers/net/ethernet/mellanox/mlx5/core/lib/wc_neon_iowrite64_copy.c
5
6 void mlx5_wc_neon_iowrite64_copy(void __iomem *to, const void *from)
7 {
8 asm volatile
> 9 ("ld1 {v0.16b, v1.16b, v2.16b, v3.16b}, [%0]\n\t"
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki