Hi Nayna, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: d15be546031cf65a0fc34879beca02fd90fe7ac7 commit: ad723674d6758478829ee766e3f1a2a24d56236f x86/efi: move common keyring handler functions to new file date: 9 months ago config: ia64-randconfig-r025-20200723 (attached as .config) compiler: ia64-linux-gcc (GCC) 9.3.0 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 git checkout ad723674d6758478829ee766e3f1a2a24d56236f # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=ia64 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 arch/ia64/include/asm/pgtable.h:154, from include/linux/mm.h:99, from arch/ia64/include/asm/uaccess.h:38, from include/linux/uaccess.h:11, from arch/ia64/include/asm/sections.h:11, from include/linux/interrupt.h:20, from include/linux/rtc.h:17, from include/linux/efi.h:20, from security/integrity/platform_certs/keyring_handler.c:7: arch/ia64/include/asm/mmu_context.h: In function 'reload_context': arch/ia64/include/asm/mmu_context.h:137:41: warning: variable 'old_rr4' set but not used [-Wunused-but-set-variable] 137 | unsigned long rr0, rr1, rr2, rr3, rr4, old_rr4; | ^~~~~~~ security/integrity/platform_certs/keyring_handler.c: At top level: 62 | __init efi_element_handler_t get_handler_for_db(const efi_guid_t *sig_type) | ^~~~~~~~~~~~~~~~~~ 73 | __init efi_element_handler_t get_handler_for_dbx(const efi_guid_t *sig_type) | ^~~~~~~~~~~~~~~~~~~ vim +/get_handler_for_db +62 security/integrity/platform_certs/keyring_handler.c 57 58 /* 59 * Return the appropriate handler for particular signature list types found in 60 * the UEFI db and MokListRT tables. 61 */ 63 { 64 if (efi_guidcmp(*sig_type, efi_cert_x509_guid) == 0) 65 return add_to_platform_keyring; 66 return 0; 67 } 68 69 /* 70 * Return the appropriate handler for particular signature list types found in 71 * the UEFI dbx and MokListXRT tables. 72 */ --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org