Hi Mike, It's probably a bug fix that unveils the link errors. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 4333a9b0b67bb4e8bcd91bdd80da80b0ec151162 commit: 4f0bd808134d73184054ad09173821c84f31dd5d asm-generic/nds32: don't redefine cacheflush primitives date: 6 months ago config: nds32-randconfig-r035-20200619 (attached as .config) compiler: nds32le-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 4f0bd808134d73184054ad09173821c84f31dd5d # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=nds32 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 >>): nds32le-linux-ld: arch/nds32/kernel/ex-entry.o: in function `common_exception_handler': (.text+0xfe): undefined reference to `__trace_hardirqs_off' (.text+0xfe): relocation truncated to fit: R_NDS32_25_PCREL_RELA against undefined symbol `__trace_hardirqs_off' nds32le-linux-ld: arch/nds32/kernel/ex-exit.o: in function `no_work_pending': (.text+0xce): undefined reference to `__trace_hardirqs_off' nds32le-linux-ld: (.text+0xd6): undefined reference to `__trace_hardirqs_on' nds32le-linux-ld: (.text+0xda): undefined reference to `__trace_hardirqs_on' --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org