Hi Guenter, FYI, the error/warning still remains. tree: https://github.com/intel/linux-intel-lts.git 5.10/yocto head: 2dafc777a64181d42982628c7f5907a03da5f070 commit: 3aeb5198342e78c3f2ed6bc9431e492a4550cd2a [12185/20393] fbmem: Mark proc_fb_seq_ops as __maybe_unused config: i386-randconfig-a002 (https://download.01.org/0day-ci/archive/20220210/202202102235.1jMCsDQH-lk...) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project aa845d7a245d85c441d0bd44fc7b6c3be8f3de8d) 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 # https://github.com/intel/linux-intel-lts/commit/3aeb5198342e78c3f2ed6bc94... git remote add intel-lts https://github.com/intel/linux-intel-lts.git git fetch --no-tags intel-lts 5.10/yocto git checkout 3aeb5198342e78c3f2ed6bc9431e492a4550cd2a # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash arch/x86/crypto/ drivers/video/fbdev/core/ 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 __maybe_unused seq_operations proc_fb_seq_ops = { ^ include/linux/compiler_attributes.h:267:56: note: expanded from macro '__maybe_unused' #define __maybe_unused __attribute__((__unused__)) ^ include/linux/seq_file.h:31:8: note: previous definition is here struct seq_operations { ^ 1 warning generated. vim +736 drivers/video/fbdev/core/fbmem.c 735 737 .start = fb_seq_start, 738 .next = fb_seq_next, 739 .stop = fb_seq_stop, 740 .show = fb_seq_show, 741 }; 742 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org