tree: https://github.com/0day-ci/linux/commits/UPDATE-20200516-195607/Jordan-Ni... head: dae797aa7e7f8d885f42df4c29129e8135bc7b1c commit: 31f742bb39071e0fddf791ddb8dc998312c5bca0 [24/30] powerpc: Test prefixed code patching config: powerpc-defconfig (attached as .config) compiler: powerpc64-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 31f742bb39071e0fddf791ddb8dc998312c5bca0 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day GCC_VERSION=9.3.0 make.cross ARCH=powerpc If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>, old ones prefixed by <<): arch/powerpc/lib/code-patching.c: In function 'test_prefixed_patching': 708 | ppc_inst_prefix(OP_PREFIX << 26, 0x00000000), | ^~~~~~~~~~~~~~~ | ppc_inst_read 708 | ppc_inst_prefix(OP_PREFIX << 26, 0x00000000), | ^~~~~~~~~ | FSCR_PREFIX arch/powerpc/lib/code-patching.c:708:24: note: each undeclared identifier is reported only once for each function it appears in cc1: all warnings being treated as errors vim +708 arch/powerpc/lib/code-patching.c 699 700 #ifdef __powerpc64__ 701 static void __init test_prefixed_patching(void) 702 { 703 extern unsigned int code_patching_test1[]; 704 extern unsigned int code_patching_test1_expected[]; 705 extern unsigned int end_code_patching_test1[]; 706 707 __patch_instruction((struct ppc_inst *)code_patching_test1, 709 (struct ppc_inst *)code_patching_test1); 710 711 check(!memcmp(code_patching_test1, 712 code_patching_test1_expected, 713 sizeof(unsigned int) * 714 (end_code_patching_test1 - code_patching_test1))); 715 } 716 #endif 717 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org