include/linux/efi.h:1101:34: warning: passing 1-byte aligned argument to 4-byte aligned parameter 2 of 'get_var' may result in an unaligned pointer access

[kernel test robot]

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/?id=e1ac4b2406d94eddce8ac2c5ab4235f6075a9602
        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 <l...@intel.com>

All warnings (new ones prefixed by >>):

   In file included from drivers/firmware/dmi_scan.c:8:
>> include/linux/efi.h:1101:34: warning: passing 1-byte aligned argument to 
>> 4-byte aligned parameter 2 of 'get_var' may result in an unaligned pointer 
>> access [-Walign-mismatch]
           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:
>> include/linux/efi.h:1101:34: warning: passing 1-byte aligned argument to 
>> 4-byte aligned parameter 2 of 'get_var' may result in an unaligned pointer 
>> access [-Walign-mismatch]
           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:
>> include/linux/efi.h:1101:34: warning: passing 1-byte aligned argument to 
>> 4-byte aligned parameter 2 of 'get_var' may result in an unaligned pointer 
>> access [-Walign-mismatch]
           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);
> 1101          status = get_var(L"SecureBoot", &EFI_GLOBAL_VARIABLE_GUID, 
> NULL, &size,
  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-...@lists.01.org

.config.gz
Description: application/gzip