tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/core head: 0ada0002925d44721185d2230c95aad477467369 commit: 0ada0002925d44721185d2230c95aad477467369 [10/10] sched: Clean up scheduler_ipi() config: arc-defconfig (attached as .config) compiler: arc-elf-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 0ada0002925d44721185d2230c95aad477467369 # save the attached .config to linux build tree GCC_VERSION=9.3.0 make.cross ARCH=arc If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): kernel/sched/core.c: In function 'sched_init': 6686 | rq_csd_init(rq, &rq->wake_csd, wake_csd_func); | ^~~~~~~~~~~ | rcu_init cc1: some warnings being treated as errors vim +6686 kernel/sched/core.c 6667 6668 rq->rt.rt_runtime = def_rt_bandwidth.rt_runtime; 6669 #ifdef CONFIG_RT_GROUP_SCHED 6670 init_tg_rt_entry(&root_task_group, &rq->rt, NULL, i, NULL); 6671 #endif 6672 #ifdef CONFIG_SMP 6673 rq->sd = NULL; 6674 rq->rd = NULL; 6675 rq->cpu_capacity = rq->cpu_capacity_orig = SCHED_CAPACITY_SCALE; 6676 rq->balance_callback = NULL; 6677 rq->active_balance = 0; 6678 rq->next_balance = jiffies; 6679 rq->push_cpu = 0; 6680 rq->cpu = i; 6681 rq->online = 0; 6682 rq->idle_stamp = 0; 6683 rq->avg_idle = 2*sysctl_sched_migration_cost; 6684 rq->max_idle_balance_cost = sysctl_sched_migration_cost; 6685 6687 6688 INIT_LIST_HEAD(&rq->cfs_tasks); 6689 6690 rq_attach_root(rq, &def_root_domain); 6691 #ifdef CONFIG_NO_HZ_COMMON 6692 rq->last_blocked_load_update_tick = jiffies; 6693 atomic_set(&rq->nohz_flags, 0); 6694 6695 rq_csd_init(rq, &rq->nohz_csd, nohz_csd_func); 6696 #endif 6697 #endif /* CONFIG_SMP */ 6698 hrtick_rq_init(rq); 6699 atomic_set(&rq->nr_iowait, 0); 6700 } 6701 6702 set_load_weight(&init_task, false); 6703 6704 /* 6705 * The boot idle thread does lazy MMU switching as well: 6706 */ 6707 mmgrab(&init_mm); 6708 enter_lazy_tlb(&init_mm, current); 6709 6710 /* 6711 * Make us the idle thread. Technically, schedule() should not be 6712 * called from this thread, however somewhere below it might be, 6713 * but because we are the idle thread, we just pick up running again 6714 * when this runqueue becomes "idle". 6715 */ 6716 init_idle(current, smp_processor_id()); 6717 6718 calc_load_update = jiffies + LOAD_FREQ; 6719 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org