tree: https://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux.git v5.10/ffa head: 9ce10ec03a756e0d3eccc023202850b73f32763b commit: 9ce10ec03a756e0d3eccc023202850b73f32763b [9/9] firmware: arm_ffa: Add support for MEM_* interfaces config: x86_64-randconfig-a003-20201111 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project a7b65741441556d295079fc4f2391d99fd1c1111) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux.git/co... git remote add skn https://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux.git git fetch --no-tags skn v5.10/ffa git checkout 9ce10ec03a756e0d3eccc023202850b73f32763b # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross 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 errors (new ones prefixed by >>): In file included from <built-in>:1: bool use_txbuf; ^ u64 tag; ^ u32 flags; ^ ./usr/include/linux/arm_ffa.h:55:2: error: unknown type name 'u32' u32 nattrs; ^ ./usr/include/linux/arm_ffa.h:57:2: error: unknown type name 'u64' u64 *g_handle; ^ 5 errors generated. --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org