tree: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git queue-4.19 head: e19f9c9b9d08b80587c0b922a18a383acaee5133 commit: e19f9c9b9d08b80587c0b922a18a383acaee5133 [2/2] powerpc/sstep: Fix load-store and update emulation config: powerpc-allyesconfig (attached as .config) compiler: powerpc64-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-4.19 git checkout e19f9c9b9d08b80587c0b922a18a383acaee5133 # 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 warnings (new ones prefixed by >>): In file included from arch/powerpc/include/asm/book3s/64/mmu-hash.h:24, from arch/powerpc/include/asm/book3s/64/mmu.h:30, from arch/powerpc/include/asm/mmu.h:313, from arch/powerpc/include/asm/lppaca.h:36, from arch/powerpc/include/asm/paca.h:21, from arch/powerpc/include/asm/current.h:16, from include/linux/mutex.h:14, from include/linux/notifier.h:14, from include/linux/kprobes.h:35, from arch/powerpc/lib/sstep.c:12: arch/powerpc/include/asm/book3s/64/pgtable.h:1292:15: warning: type qualifiers ignored on function return type [-Wignored-qualifiers] 1292 | static inline const int pud_pfn(pud_t pud) | ^~~~~ arch/powerpc/lib/sstep.c: In function 'analyse_instr': arch/powerpc/lib/sstep.c:2554:4: error: 'fallthrough' undeclared (first use in this function) 2554 | fallthrough; | ^~~~~~~~~~~ arch/powerpc/lib/sstep.c:2554:4: note: each undeclared identifier is reported only once for each function it appears in arch/powerpc/lib/sstep.c:2559:5: error: label 'unknown_opcode' used but not defined 2559 | goto unknown_opcode; | ^~~~ 2552 | if (ra == rd) | ^ arch/powerpc/lib/sstep.c:2555:3: note: here 2555 | case STORE: | ^~~~ vim +2552 arch/powerpc/lib/sstep.c 2546 2547 } 2548 2549 if (OP_IS_LOAD_STORE(op->type) && (op->type & UPDATE)) { 2550 switch (GETTYPE(op->type)) { 2551 case LOAD: 2553 goto unknown_opcode; 2554 fallthrough; 2555 case STORE: 2556 case LOAD_FP: 2557 case STORE_FP: 2558 if (ra == 0) 2559 goto unknown_opcode; 2560 } 2561 } 2562 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org