tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: cb690f5238d71f543f4ce874aa59237cf53a877c commit: 800149a77c2cb8746a94457939b1ba1e37d2c14e riscv: sifive: Apply errata "cip-453" patch date: 7 months ago config: riscv-randconfig-c006-20211109 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project f3798ad5fa845771846599f3c088016e3aef800c) 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://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 800149a77c2cb8746a94457939b1ba1e37d2c14e # 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 >>): if (arch_id != 0x8000000000000007 || ~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~ 1 warning generated. vim +26 arch/riscv/errata/sifive/errata.c 18 19 static bool errata_cip_453_check_func(unsigned long arch_id, unsigned long impid) 20 { 21 /* 22 * Affected cores: 23 * Architecture ID: 0x8000000000000007 24 * Implement ID: 0x20181004 <= impid <= 0x20191105 25 */ 27 (impid < 0x20181004 || impid > 0x20191105)) 28 return false; 29 return true; 30 } 31 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org