tree: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git pending-4.19 head: 9e4326e6556760bf597f715b985ba9f69bcce320 commit: 9e4326e6556760bf597f715b985ba9f69bcce320 [82/82] module: limit enabling module.sig_enforce config: arm-randconfig-r016-20210622 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 7c8a507272587f181ec29401453949ebcd8fec65) 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 arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git/c... git remote add sashal-linux-stable https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git git fetch --no-tags sashal-linux-stable pending-4.19 git checkout 9e4326e6556760bf597f715b985ba9f69bcce320 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm 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 set_module_sig_enforced(void) ^ kernel/module.c:275:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void set_module_sig_enforced(void) ^ static kernel/module.c:4488:6: warning: no previous prototype for function 'module_layout' [-Wmissing-prototypes] void module_layout(struct module *mod, ^ kernel/module.c:4488:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void module_layout(struct module *mod, ^ static 2 warnings generated. ld.lld: warning: lld uses blx instruction, no object with architecture supporting feature detected vim +/set_module_sig_enforced +275 kernel/module.c 274 276 { 277 sig_enforce = true; 278 } 279 #else 280 #define sig_enforce false 281 #endif 282 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org