Hi Jinzhou, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 17e7124aad766b3f158943acb51467f86220afe9 commit: ecaafb7b5ab6406587341d8727f237b3ee00dedf drm/amdgpu: Add secure display TA interface date: 3 months ago config: arm64-randconfig-r035-20210409 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project dd453a1389b6a7e6d9214b449d3c54981b1a89b6) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout ecaafb7b5ab6406587341d8727f237b3ee00dedf # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): static const struct file_operations amdgpu_securedisplay_debugfs_ops = { ^ 1 warning generated. vim +/amdgpu_securedisplay_debugfs_ops +159 drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c 158 160 .owner = THIS_MODULE, 161 .read = NULL, 162 .write = amdgpu_securedisplay_debugfs_write, 163 .llseek = default_llseek 164 }; 165 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org