tree: https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux-next.git 20211118-sysctl-cleanups-set-04-v4 head: be45d1710bab2a205a293605be8696ecf8571084 commit: 764cf5b53fe8fefda5bbf35b59d6d179753ea5bc [18/41] firmware_loader: move firmware sysctl to its own files config: hexagon-randconfig-r014-20211118 (attached as .config) 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/mcgrof/linux-next.git/com... git remote add mcgrof-next https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux-next.git git fetch --no-tags mcgrof-next 20211118-sysctl-cleanups-set-04-v4 git checkout 764cf5b53fe8fefda5bbf35b59d6d179753ea5bc # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/base/firmware_loader/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): unregister_sysctl_table(hdr); ^ 1 error generated. vim +/hdr +62 drivers/base/firmware_loader/fallback_table.c 59 60 void unregister_firmware_config_sysctl(void) 61 { --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org