tree: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git pending-5.14 head: 59866f9b89f5e40470ac87841bce5bf6eacdfdf6 commit: 5f907f2abe30e022918ddea8d07ead241765d3d8 [46/120] firmware: arm_ffa: Add missing remove callback to ffa_bus_type config: arm64-randconfig-r024-20211018 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project d245f2e8597bfb52c34810a328d42b990e4af1a4) 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 arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git/c... git remote add sashal-stable https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git git fetch --no-tags sashal-stable pending-5.14 git checkout 5f907f2abe30e022918ddea8d07ead241765d3d8 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=arm64 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 >>): .remove = ffa_device_remove, ^~~~~~~~~~~~~~~~~ 1 error generated. vim +96 drivers/firmware/arm_ffa/bus.c 91 92 struct bus_type ffa_bus_type = { 93 .name = "arm_ffa", 94 .match = ffa_device_match, 95 .probe = ffa_device_probe, 97 .uevent = ffa_device_uevent, 98 .dev_groups = ffa_device_attributes_groups, 99 }; 100 EXPORT_SYMBOL_GPL(ffa_bus_type); 101 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org