Hi Anup, FYI, the error/warning still remains. tree: https://github.com/avpatel/linux.git riscv_kvm_aia_v1 head: 02cc9f6a02a4cd96882f719d53e5f3e16e549288 commit: b558ac643cf43938bfd21643ec02336eb045ebae [22/44] RISC-V: Treat IPIs as normal Linux IRQs config: riscv-randconfig-r024-20210824 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project d26000e4cc2bc65e207a84fa26cb6e374d60aa12) 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 riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://github.com/avpatel/linux/commit/b558ac643cf43938bfd21643ec02336eb... git remote add avpatel https://github.com/avpatel/linux.git git fetch --no-tags avpatel riscv_kvm_aia_v1 git checkout b558ac643cf43938bfd21643ec02336eb045ebae # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=riscv SHELL=/bin/bash 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 >>, old ones prefixed by <<): The function riscv_ipi_setup() references the function __init sbi_ipi_init(). This is often because riscv_ipi_setup lacks a __init annotation or the annotation of sbi_ipi_init is wrong. --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org