tree: https://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes head: 46df6f5d84587acb945bc82314933290c68c1948 commit: 74fdd585bc81aa57f0cb1667abc4700e04b913f8 [2/4] RISC-V: Resurrect the MMIO timer implementation for M-mode systems config: riscv-allnoconfig (attached as .config) compiler: riscv64-linux-gcc (GCC) 9.3.0 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 git checkout 74fdd585bc81aa57f0cb1667abc4700e04b913f8 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 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 errors (new ones prefixed by >>): riscv64-linux-ld: init/calibrate.o: in function `.L8': riscv64-linux-ld: lib/random32.o: in function `.L0 ': riscv64-linux-ld: drivers/char/random.o: in function `.L0 ': riscv64-linux-ld: drivers/char/random.o: in function `.L130': random.c:(.text+0x8cc): undefined reference to `clint_time_val' riscv64-linux-ld: drivers/char/random.o: in function `.L245': random.c:(.text+0x10e0): undefined reference to `clint_time_val' riscv64-linux-ld: drivers/char/random.o:random.c:(.text+0x121c): more undefined references to `clint_time_val' follow --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org