tree: https://git.linaro.org/people/vincent.guittot/kernel.git test/scheduler head: 1e5360db16325edbc2b5afcd085644615a12b0a8 commit: 870213e345cbcfecdacc95c0d9e41fbd6e44070b [6/7] sched/fair: trigger the update of blocked load on newly idle cpu config: arc-randconfig-c004-20210209 (attached as .config) compiler: arc-elf-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 remote add vincent.guittot https://git.linaro.org/people/vincent.guittot/kernel.git git fetch --no-tags vincent.guittot test/scheduler git checkout 870213e345cbcfecdacc95c0d9e41fbd6e44070b # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc 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 >>): arc-elf-ld: kernel/sched/idle.o: in function `do_idle': idle.c:(.text+0xf8): undefined reference to `nohz_run_idle_balance' arc-elf-ld: lib/stackdepot.o: in function `filter_irq_stacks': stackdepot.c:(.text+0x3de): undefined reference to `__irqentry_text_start' arc-elf-ld: stackdepot.c:(.text+0x3de): undefined reference to `__irqentry_text_start' arc-elf-ld: stackdepot.c:(.text+0x3fe): undefined reference to `__irqentry_text_end' arc-elf-ld: stackdepot.c:(.text+0x3fe): undefined reference to `__irqentry_text_end' arc-elf-ld: stackdepot.c:(.text+0x40c): undefined reference to `__softirqentry_text_start' arc-elf-ld: stackdepot.c:(.text+0x40c): undefined reference to `__softirqentry_text_start' arc-elf-ld: stackdepot.c:(.text+0x414): undefined reference to `__softirqentry_text_end' arc-elf-ld: stackdepot.c:(.text+0x414): undefined reference to `__softirqentry_text_end' --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org