Hi Atish, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: a9c9a6f741cdaa2fa9ba24a790db8d07295761e3 commit: d7071743db31b4f6898b1c742e4b451bb4bc4b02 RISC-V: Add EFI stub support. date: 11 months ago config: riscv-randconfig-r022-20210904 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 1104e3258b5064e7110cc297e2cec60ac9acfc0a) 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 riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d7071743db31b4f6898b1c742e4b451bb4bc4b02 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout d7071743db31b4f6898b1c742e4b451bb4bc4b02 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): >> security/integrity/platform_certs/keyring_handler.c:62:30: warning: no previous prototype for function 'get_handler_for_db' [-Wmissing-prototypes] __init efi_element_handler_t get_handler_for_db(const efi_guid_t *sig_type) ^ security/integrity/platform_certs/keyring_handler.c:62:8: note: declare 'static' if the function is not intended to be used outside of this translation unit __init efi_element_handler_t get_handler_for_db(const efi_guid_t *sig_type) ^ static >> security/integrity/platform_certs/keyring_handler.c:73:30: warning: no previous prototype for function 'get_handler_for_dbx' [-Wmissing-prototypes] __init efi_element_handler_t get_handler_for_dbx(const efi_guid_t *sig_type) ^ security/integrity/platform_certs/keyring_handler.c:73:8: note: declare 'static' if the function is not intended to be used outside of this translation unit __init efi_element_handler_t get_handler_for_dbx(const efi_guid_t *sig_type) ^ static 2 warnings generated. vim +/get_handler_for_db +62 security/integrity/platform_certs/keyring_handler.c ad723674d67584 Nayna Jain 2019-11-10 57 ad723674d67584 Nayna Jain 2019-11-10 58 /* ad723674d67584 Nayna Jain 2019-11-10 59 * Return the appropriate handler for particular signature list types found in ad723674d67584 Nayna Jain 2019-11-10 60 * the UEFI db and MokListRT tables. ad723674d67584 Nayna Jain 2019-11-10 61 */ ad723674d67584 Nayna Jain 2019-11-10 @62 __init efi_element_handler_t get_handler_for_db(const efi_guid_t *sig_type) ad723674d67584 Nayna Jain 2019-11-10 63 { ad723674d67584 Nayna Jain 2019-11-10 64 if (efi_guidcmp(*sig_type, efi_cert_x509_guid) == 0) ad723674d67584 Nayna Jain 2019-11-10 65 return add_to_platform_keyring; ad723674d67584 Nayna Jain 2019-11-10 66 return 0; ad723674d67584 Nayna Jain 2019-11-10 67 } ad723674d67584 Nayna Jain 2019-11-10 68 ad723674d67584 Nayna Jain 2019-11-10 69 /* ad723674d67584 Nayna Jain 2019-11-10 70 * Return the appropriate handler for particular signature list types found in ad723674d67584 Nayna Jain 2019-11-10 71 * the UEFI dbx and MokListXRT tables. ad723674d67584 Nayna Jain 2019-11-10 72 */ ad723674d67584 Nayna Jain 2019-11-10 @73 __init efi_element_handler_t get_handler_for_dbx(const efi_guid_t *sig_type) :::::: The code at line 62 was first introduced by commit :::::: ad723674d6758478829ee766e3f1a2a24d56236f x86/efi: move common keyring handler functions to new file :::::: TO: Nayna Jain :::::: CC: Michael Ellerman --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org