tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 05a59d79793d482f628a31753c671f2e92178a21 commit: e1ac4b2406d94eddce8ac2c5ab4235f6075a9602 efi: generalize efi_get_secureboot date: 4 months ago config: x86_64-randconfig-a016-20210308 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project cd9a69289c7825d54450cb6829fef2c8e0f1963a) 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 # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout e1ac4b2406d94eddce8ac2c5ab4235f6075a9602 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 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 drivers/firmware/dmi_scan.c:8: status = get_var(L"SecureBoot", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size, ^ include/linux/efi.h:1109:24: warning: passing 1-byte aligned argument to 4-byte aligned parameter 2 of 'get_var' may result in an unaligned pointer access [-Walign-mismatch] get_var(L"SetupMode", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size, &setupmode); ^ 2 warnings generated. -- In file included from init/main.c:50: status = get_var(L"SecureBoot", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size, ^ include/linux/efi.h:1109:24: warning: passing 1-byte aligned argument to 4-byte aligned parameter 2 of 'get_var' may result in an unaligned pointer access [-Walign-mismatch] get_var(L"SetupMode", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size, &setupmode); ^ init/main.c:766:20: warning: no previous prototype for function 'mem_encrypt_init' [-Wmissing-prototypes] void __init __weak mem_encrypt_init(void) { } ^ init/main.c:766:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void __init __weak mem_encrypt_init(void) { } ^ static 3 warnings generated. -- In file included from arch/x86/mm/ioremap.c:18: status = get_var(L"SecureBoot", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size, ^ include/linux/efi.h:1109:24: warning: passing 1-byte aligned argument to 4-byte aligned parameter 2 of 'get_var' may result in an unaligned pointer access [-Walign-mismatch] get_var(L"SetupMode", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size, &setupmode); ^ arch/x86/mm/ioremap.c:737:17: warning: no previous prototype for function 'early_memremap_pgprot_adjust' [-Wmissing-prototypes] pgprot_t __init early_memremap_pgprot_adjust(resource_size_t phys_addr, ^ arch/x86/mm/ioremap.c:737:1: note: declare 'static' if the function is not intended to be used outside of this translation unit pgprot_t __init early_memremap_pgprot_adjust(resource_size_t phys_addr, ^ static 3 warnings generated. vim +/get_var +1101 include/linux/efi.h 1092 1093 static inline 1094 enum efi_secureboot_mode efi_get_secureboot_mode(efi_get_variable_t *get_var) 1095 { 1096 u8 secboot, setupmode = 0; 1097 efi_status_t status; 1098 unsigned long size; 1099 1100 size = sizeof(secboot); 1102 &secboot); 1103 if (status == EFI_NOT_FOUND) 1104 return efi_secureboot_mode_disabled; 1105 if (status != EFI_SUCCESS) 1106 return efi_secureboot_mode_unknown; 1107 1108 size = sizeof(setupmode); 1109 get_var(L"SetupMode", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size, &setupmode); 1110 if (secboot == 0 || setupmode == 1) 1111 return efi_secureboot_mode_disabled; 1112 return efi_secureboot_mode_enabled; 1113 } 1114 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org