tree: https://github.com/avpatel/linux.git riscv_kvm_v18 head: f198c4badee6795b153eb2ed3ec6d173829f71bc commit: ee2968004c30cf4e1a0346dd876d57ab0a0e78d4 [14/20] RISC-V: KVM: Add timer functionality config: riscv-randconfig-r013-20210518 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project ceb1ac9812cb0972cfa34cecc5e5704ae2a22063) 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/ee2968004c30cf4e1a0346dd876d57ab0... git remote add avpatel https://github.com/avpatel/linux.git git fetch --no-tags avpatel riscv_kvm_v18 git checkout ee2968004c30cf4e1a0346dd876d57ab0a0e78d4 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv 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 >>): void riscv_cs_get_mult_shift(u32 *mult, u32 *shift) ^ drivers/clocksource/timer-riscv.c:83:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void riscv_cs_get_mult_shift(u32 *mult, u32 *shift) ^ static 1 warning generated. vim +/riscv_cs_get_mult_shift +83 drivers/clocksource/timer-riscv.c 82 84 { 85 *mult = riscv_clocksource.mult; 86 *shift = riscv_clocksource.shift; 87 } 88 EXPORT_SYMBOL_GPL(riscv_cs_get_mult_shift); 89 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org