Hi Alexandre, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on linus/master] [also build test WARNING on v6.2-rc6 next-20230131] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Alexandre-Ghiti/riscv-Split-early-and-final-KASAN-population-functions/20230125-163113 patch link: https://lore.kernel.org/r/20230125082333.1577572-3-alexghiti%40rivosinc.com patch subject: [PATCH v3 2/6] riscv: Rework kasan population functions config: riscv-randconfig-r006-20230201 (https://download.01.org/0day-ci/archive/20230201/202302010819.RAsjyv6V-lkp@xxxxxxxxx/config) compiler: riscv64-linux-gcc (GCC) 12.1.0 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/intel-lab-lkp/linux/commit/c18726e8d14edbd59ec19854b4eb06d83fff716f git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Alexandre-Ghiti/riscv-Split-early-and-final-KASAN-population-functions/20230125-163113 git checkout c18726e8d14edbd59ec19854b4eb06d83fff716f # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=riscv olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash arch/riscv/mm/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> arch/riscv/mm/kasan_init.c:442:6: warning: no previous prototype for 'create_tmp_mapping' [-Wmissing-prototypes] 442 | void create_tmp_mapping(void) | ^~~~~~~~~~~~~~~~~~ vim +/create_tmp_mapping +442 arch/riscv/mm/kasan_init.c 441 > 442 void create_tmp_mapping(void) 443 { 444 void *ptr; 445 p4d_t *base_p4d; 446 447 /* 448 * We need to clean the early mapping: this is hard to achieve "in-place", 449 * so install a temporary mapping like arm64 and x86 do. 450 */ 451 memcpy(tmp_pg_dir, swapper_pg_dir, sizeof(pgd_t) * PTRS_PER_PGD); 452 453 /* Copy the last p4d since it is shared with the kernel mapping. */ 454 if (pgtable_l5_enabled) { 455 ptr = (p4d_t *)pgd_page_vaddr(*pgd_offset_k(KASAN_SHADOW_END)); 456 memcpy(tmp_p4d, ptr, sizeof(p4d_t) * PTRS_PER_P4D); 457 set_pgd(&tmp_pg_dir[pgd_index(KASAN_SHADOW_END)], 458 pfn_pgd(PFN_DOWN(__pa(tmp_p4d)), PAGE_TABLE)); 459 base_p4d = tmp_p4d; 460 } else { 461 base_p4d = (p4d_t *)tmp_pg_dir; 462 } 463 464 /* Copy the last pud since it is shared with the kernel mapping. */ 465 if (pgtable_l4_enabled) { 466 ptr = (pud_t *)p4d_page_vaddr(*(base_p4d + p4d_index(KASAN_SHADOW_END))); 467 memcpy(tmp_pud, ptr, sizeof(pud_t) * PTRS_PER_PUD); 468 set_p4d(&base_p4d[p4d_index(KASAN_SHADOW_END)], 469 pfn_p4d(PFN_DOWN(__pa(tmp_pud)), PAGE_TABLE)); 470 } 471 } 472 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
