tree: https://github.com/jcmvbkbc/linux-xtensa xtensa-5.12-rochester head: c590cacf4bfbe4167acb4b5d6c0fd5c5df0ba38a commit: 2937756c60b8d00662cf5ca679fc9acfd0ecd920 [20/21] WIP: xtensa: add dump_tlb config: xtensa-allyesconfig (attached as .config) compiler: xtensa-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://github.com/jcmvbkbc/linux-xtensa/commit/2937756c60b8d00662cf5ca67... git remote add jcmvbkbc-xtensa https://github.com/jcmvbkbc/linux-xtensa git fetch --no-tags jcmvbkbc-xtensa xtensa-5.12-rochester git checkout 2937756c60b8d00662cf5ca679fc9acfd0ecd920 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=xtensa 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 >>): 212 | void dump_tlb_entry(unsigned w, unsigned e, bool dtlb) | ^~~~~~~~~~~~~~ 225 | void dump_tlb(void) | ^~~~~~~~ arch/xtensa/mm/tlb.c:286:6: warning: no previous prototype for 'check_tlb_sanity' [-Wmissing-prototypes] 286 | void check_tlb_sanity(void) | ^~~~~~~~~~~~~~~~ vim +/dump_tlb_entry +212 arch/xtensa/mm/tlb.c 211 213 { 214 unsigned tlbidx = w | (e << PAGE_SHIFT); 215 unsigned r0 = dtlb ? 216 read_dtlb_virtual(tlbidx) : read_itlb_virtual(tlbidx); 217 unsigned r1 = dtlb ? 218 read_dtlb_translation(tlbidx) : read_itlb_translation(tlbidx); 219 unsigned vpn = (r0 & PAGE_MASK) | (e << PAGE_SHIFT); 220 221 pr_info("%cTLB[%d][%d]: v=%08x, p=%08x, vaddr=%08x\n", 222 dtlb ? 'D' : 'I', w, e, r0, r1, vpn); 223 } 224 226 { 227 unsigned w, e; 228 229 for (w = 7; w < 9; ++w) 230 for (e = 0; e < 4; ++e) 231 dump_tlb_entry(w, e, 1); 232 } 233 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org