tree: https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev.2020.08.10a head: 9dd4d242c535c30266a08806314ea6b016f94617 commit: 9e20110f8ef2745df8f4fe2d679114dccfaaa1af [105/111] rcu: Report QS for outermost PREEMPT=n rcu_read_unlock() for strict GPs 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 9e20110f8ef2745df8f4fe2d679114dccfaaa1af # 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/main.o: in function `.L0 ': main.c:(.ref.text+0x34): undefined reference to `rcu_read_unlock_strict' riscv64-linux-ld: kernel/fork.o: in function `.L26': fork.c:(.text+0x144): undefined reference to `rcu_read_unlock_strict' riscv64-linux-ld: kernel/fork.o: in function `.L27': fork.c:(.text+0x164): undefined reference to `rcu_read_unlock_strict' riscv64-linux-ld: kernel/fork.o: in function `.L183': fork.c:(.text+0xbb4): undefined reference to `rcu_read_unlock_strict' riscv64-linux-ld: kernel/fork.o:fork.c:(.text+0xbd4): more undefined references to `rcu_read_unlock_strict' follow --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org