tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 2e9a9857569ec27e64d2ddd01294bbe3c736acb1 commit: 2340e5b0b93c2d5c1519371bac0fd3acb0fb925d [1114/3040] [RFC] drivers: gpio: PrimeCell PL061 in Rust config: arm64-buildonly-randconfig-r003-20220408 (https://download.01.org/0day-ci/archive/20220408/202204081643.OiIBxOdF-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project c29a51b3a257908aebc01cd7c4655665db317d66) 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/next/linux-next.git/commit/?id=2340e5b0b93c2d5c1519371bac0fd3acb0fb925d git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 2340e5b0b93c2d5c1519371bac0fd3acb0fb925d # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>, old ones prefixed by <<): >> ERROR: modpost: "build_error" [drivers/gpio/gpio_pl061_rust.ko] undefined! -- 0-DAY CI Kernel Test Service https://01.org/lkp