Thread (11 messages) 11 messages, 6 authors, 2025-09-16

Re: [PATCH net-next V2] net/mlx5: Improve write-combining test reliability for ARM64 Grace CPUs

From: kernel test robot <hidden>
Date: 2025-09-16 05:45:55
Also in: linux-mm, linux-rdma, lkml, llvm, oe-kbuild-all

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@intel.com/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@intel.com/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 [off-list ref]
| Closes: https://lore.kernel.org/oe-kbuild-all/202509161338.Kq88HUjH-lkp@intel.com/ (local)

All errors (new ones prefixed by >>):
quoted
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
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