tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git x86/fpu head: fb58f76671de512da1ee76a77977eb6edb4d0071 commit: 8388f5d27cf18ab67cb40c4ff289c5ab3f721369 [5/9] jump_label, x86: Improve error when we fail expected text config: x86_64-randconfig-a003-20210309 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project cd9a69289c7825d54450cb6829fef2c8e0f1963a) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?... git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git git fetch --no-tags peterz-queue x86/fpu git checkout 8388f5d27cf18ab67cb40c4ff289c5ab3f721369 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): addr, addr, addr, expect, init, type); ^ 1 error generated. vim +/init +42 arch/x86/kernel/jump_label.c 18 19 static const void * 20 __jump_label_set_jump_code(struct jump_entry *entry, enum jump_label_type type) 21 { 22 const void *expect, *code; 23 const void *addr, *dest; 24 25 addr = (void *)jump_entry_code(entry); 26 dest = (void *)jump_entry_target(entry); 27 28 code = text_gen_insn(JMP32_INSN_OPCODE, addr, dest); 29 30 if (type == JUMP_LABEL_JMP) 31 expect = x86_nops[5]; 32 else 33 expect = code; 34 35 if (memcmp(addr, expect, JUMP_LABEL_NOP_SIZE)) { 36 /* 37 * The location is not an op that we were expecting. 38 * Something went wrong. Crash the box, as something could be 39 * corrupting the kernel. 40 */ 41 pr_crit("jump_label: Fatal kernel bug, unexpected op at %pS [%p] (%5ph != %5ph)) init:%d type:%d\n", 43 BUG(); 44 } 45 46 if (type == JUMP_LABEL_NOP) 47 code = x86_nops[5]; 48 49 return code; 50 } 51 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org