tree: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git queue-5.4 head: 74cb9d74e6b6e93cae875cc04536f543eacb1704 commit: c3be26ccd0ade97c537a79b2a8467f1f6aaef0e4 [184/189] powerpc/sstep: Fix load-store and update emulation config: powerpc-mpc8540_ads_defconfig (attached as .config) compiler: powerpc-linux-gcc (GCC) 9.3.0 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://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git/c... git remote add sashal-linux-stable https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git git fetch --no-tags sashal-linux-stable queue-5.4 git checkout c3be26ccd0ade97c537a79b2a8467f1f6aaef0e4 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc 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 >>): arch/powerpc/lib/sstep.c: In function 'analyse_instr': 2670 | goto unknown_opcode; | ^~~~ arch/powerpc/lib/sstep.c:1168:31: error: variable 'rc' set but not used [-Werror=unused-but-set-variable] 1168 | unsigned int opcode, ra, rb, rc, rd, spr, u; | ^~ cc1: all warnings being treated as errors -- arch/powerpc/lib/sstep.c: In function 'analyse_instr': 2670 | goto unknown_opcode; | ^~~~ arch/powerpc/lib/sstep.c:1168:31: warning: variable 'rc' set but not used [-Wunused-but-set-variable] 1168 | unsigned int opcode, ra, rb, rc, rd, spr, u; | ^~ vim +/unknown_opcode +2670 arch/powerpc/lib/sstep.c 2657 2658 } 2659 2660 if (OP_IS_LOAD_STORE(op->type) && (op->type & UPDATE)) { 2661 switch (GETTYPE(op->type)) { 2662 case LOAD: 2663 if (ra == rd) 2664 goto unknown_opcode; 2665 fallthrough; 2666 case STORE: 2667 case LOAD_FP: 2668 case STORE_FP: 2669 if (ra == 0) 2671 } 2672 } 2673 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org