Hi Kevin, kernel test robot noticed the following build errors:
[auto build test ERROR on 6de23f81a5e08be8fbf5e8d7e9febc72a5b5f27f] url: https://github.com/intel-lab-lkp/linux/commits/Kevin-Brodsky/mm-Introduce-kpkeys/20260228-020115 base: 6de23f81a5e08be8fbf5e8d7e9febc72a5b5f27f patch link: https://lore.kernel.org/r/20260227175518.3728055-24-kevin.brodsky%40arm.com patch subject: [PATCH v6 23/30] arm64: kpkeys: Ensure the linear map can be modified config: arm64-randconfig-001-20260228 (https://download.01.org/0day-ci/archive/20260228/[email protected]/config) compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project 9a109fbb6e184ec9bcce10615949f598f4c974a9) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260228/[email protected]/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <[email protected]> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/ All errors (new ones prefixed by >>): >> arch/arm64/mm/pageattr.c:100:3: error: call to undeclared function >> 'arm64_supports_kpkeys_hardened_pgtables'; ISO C99 and later do not support >> implicit function declarations [-Wimplicit-function-declaration] 100 | arm64_supports_kpkeys_hardened_pgtables(); | ^ 1 error generated. -- >> arch/arm64/mm/mmu.c:768:3: error: call to undeclared function >> 'arm64_supports_kpkeys_hardened_pgtables'; ISO C99 and later do not support >> implicit function declarations [-Wimplicit-function-declaration] 768 | arm64_supports_kpkeys_hardened_pgtables(); | ^ 1 error generated. vim +/arm64_supports_kpkeys_hardened_pgtables +100 arch/arm64/mm/pageattr.c 86 87 bool can_set_direct_map(void) 88 { 89 /* 90 * rodata_full, DEBUG_PAGEALLOC and a Realm guest all require linear 91 * map to be mapped at page granularity, so that it is possible to 92 * protect/unprotect single pages. 93 * 94 * KFENCE pool requires page-granular mapping if initialized late. 95 * 96 * Realms need to make pages shared/protected at page granularity. 97 */ 98 return rodata_full || debug_pagealloc_enabled() || 99 arm64_kfence_can_set_direct_map() || is_realm_world() || > 100 arm64_supports_kpkeys_hardened_pgtables(); 101 } 102 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
