tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 8ab774587903771821b59471cc723bba6d893942 commit: d391c58271072d0b0fad93c82018d495b2633448 drivers/firmware: move x86 Generic System Framebuffers support date: 4 months ago config: x86_64-randconfig-r005-20211116 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project fbe72e41b99dc7994daac300d208a955be3e4a0a) 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 # 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 d391c58271072d0b0fad93c82018d495b2633448 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 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 >>): void efifb_setup_from_dmi(struct screen_info *si, const char *opt) ^ drivers/firmware/efi/sysfb_efi.c:70:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void efifb_setup_from_dmi(struct screen_info *si, const char *opt) ^ static drivers/firmware/efi/sysfb_efi.c:270:1: warning: attribute declaration must precede definition [-Wignored-attributes] __init void sysfb_apply_efi_quirks(void) ^ include/linux/init.h:50:17: note: expanded from macro '__init' #define __init __section(".init.text") __cold __latent_entropy __noinitretpoline __nocfi ^ include/linux/compiler_attributes.h:263:56: note: expanded from macro '__section' #define __section(section) __attribute__((__section__(section))) ^ include/linux/sysfb.h:65:20: note: previous definition is here static inline void sysfb_apply_efi_quirks(void) ^ drivers/firmware/efi/sysfb_efi.c:270:1: warning: attribute declaration must precede definition [-Wignored-attributes] __init void sysfb_apply_efi_quirks(void) ^ include/linux/init.h:50:41: note: expanded from macro '__init' #define __init __section(".init.text") __cold __latent_entropy __noinitretpoline __nocfi ^ include/linux/compiler_attributes.h:92:56: note: expanded from macro '__cold' #define __cold __attribute__((__cold__)) ^ include/linux/sysfb.h:65:20: note: previous definition is here static inline void sysfb_apply_efi_quirks(void) ^ drivers/firmware/efi/sysfb_efi.c:270:1: warning: attribute declaration must precede definition [-Wignored-attributes] __init void sysfb_apply_efi_quirks(void) ^ include/linux/init.h:50:84: note: expanded from macro '__init' #define __init __section(".init.text") __cold __latent_entropy __noinitretpoline __nocfi ^ include/linux/compiler-clang.h:65:33: note: expanded from macro '__nocfi' #define __nocfi __attribute__((__no_sanitize__("cfi"))) ^ include/linux/sysfb.h:65:20: note: previous definition is here static inline void sysfb_apply_efi_quirks(void) ^ drivers/firmware/efi/sysfb_efi.c:270:13: error: redefinition of 'sysfb_apply_efi_quirks' __init void sysfb_apply_efi_quirks(void) ^ include/linux/sysfb.h:65:20: note: previous definition is here static inline void sysfb_apply_efi_quirks(void) ^ 4 warnings and 1 error generated. vim +/efifb_setup_from_dmi +70 drivers/firmware/efi/sysfb_efi.c 2995e506276bfd arch/x86/kernel/sysfb_efi.c David Herrmann 2013-08-02 69 21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25 @70 void efifb_setup_from_dmi(struct screen_info *si, const char *opt) 21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25 71 { 21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25 72 int i; 21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25 73 21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25 74 for (i = 0; i < M_UNKNOWN; i++) { 21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25 75 if (efifb_dmi_list[i].base != 0 && 21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25 76 !strcmp(opt, efifb_dmi_list[i].optname)) { 21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25 77 si->lfb_base = efifb_dmi_list[i].base; 21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25 78 si->lfb_linelength = efifb_dmi_list[i].stride; 21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25 79 si->lfb_width = efifb_dmi_list[i].width; 21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25 80 si->lfb_height = efifb_dmi_list[i].height; 21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25 81 } 21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25 82 } 21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25 83 } 21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25 84 :::::: The code at line 70 was first introduced by commit :::::: 21289ec02b41c4b928a0b3de1778b325d714eea3 x86/efi/efifb: Move DMI based quirks handling out of generic code :::::: TO: Ard Biesheuvel <ard.biesheuvel(a)linaro.org&gt; :::::: CC: Ingo Molnar <mingo(a)kernel.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org