tree: https://github.com/intel/linux-intel-lts.git 5.10/preempt-rt head: 92cafac7cc9c1af94b9b5b61e35fbbd39d4f5854 commit: 3aeb5198342e78c3f2ed6bc9431e492a4550cd2a [12539/17820] fbmem: Mark proc_fb_seq_ops as __maybe_unused config: riscv-randconfig-r042-20211018 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project d245f2e8597bfb52c34810a328d42b990e4af1a4) 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 riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # 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/preempt-rt git checkout 3aeb5198342e78c3f2ed6bc9431e492a4550cd2a # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=riscv 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. Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for LOCKDEP Depends on DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT && (FRAME_POINTER || MIPS || PPC || S390 || MICROBLAZE || ARM || ARC || X86) Selected by - PROVE_LOCKING && DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT - DEBUG_LOCK_ALLOC && DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT 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