tree: https://android.googlesource.com/kernel/common android12-5.10 head: fb03f7bef8ea486a56b0084619d87e1a11ccf53c commit: c7ba09ce6aa54f9f851b8cf1a9a0b145d0f42f9e [3037/3047] ANDROID: sched/fair: Sync task util for strf hook config: i386-randconfig-s001-20210112 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-208-g46a52ca4-dirty git remote add android-common https://android.googlesource.com/kernel/common git fetch --no-tags android-common android12-5.10 git checkout c7ba09ce6aa54f9f851b8cf1a9a0b145d0f42f9e # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386 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 >>): kernel/sched/fair.c: In function 'select_task_rq_fair': 6766 | if (trace_android_rvh_select_task_rq_fair_enabled()) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | trace_android_rvh_select_task_rq_fair cc1: some warnings being treated as errors vim +6766 kernel/sched/fair.c 6743 6744 /* 6745 * select_task_rq_fair: Select target runqueue for the waking task in domains 6746 * that have the 'sd_flag' flag set. In practice, this is SD_BALANCE_WAKE, 6747 * SD_BALANCE_FORK, or SD_BALANCE_EXEC. 6748 * 6749 * Balances load by selecting the idlest CPU in the idlest group, or under 6750 * certain conditions an idle sibling CPU if the domain has SD_WAKE_AFFINE set. 6751 * 6752 * Returns the target CPU number. 6753 * 6754 * preempt must be disabled. 6755 */ 6756 static int 6757 select_task_rq_fair(struct task_struct *p, int prev_cpu, int sd_flag, int wake_flags) 6758 { 6759 struct sched_domain *tmp, *sd = NULL; 6760 int cpu = smp_processor_id(); 6761 int new_cpu = prev_cpu; 6762 int want_affine = 0; 6763 int sync = (wake_flags & WF_SYNC) && !(current->flags & PF_EXITING); 6764 int target_cpu = -1; 6765 6767 sync_entity_load_avg(&p->se); 6768 trace_android_rvh_select_task_rq_fair(p, prev_cpu, sd_flag, 6769 wake_flags, &target_cpu); 6770 if (target_cpu >= 0) 6771 return target_cpu; 6772 6773 if (sd_flag & SD_BALANCE_WAKE) { 6774 record_wakee(p); 6775 6776 if (sched_energy_enabled()) { 6777 new_cpu = find_energy_efficient_cpu(p, prev_cpu, sync); 6778 if (new_cpu >= 0) 6779 return new_cpu; 6780 new_cpu = prev_cpu; 6781 } 6782 6783 want_affine = !wake_wide(p) && cpumask_test_cpu(cpu, p->cpus_ptr); 6784 } 6785 6786 rcu_read_lock(); 6787 for_each_domain(cpu, tmp) { 6788 /* 6789 * If both 'cpu' and 'prev_cpu' are part of this domain, 6790 * cpu is a valid SD_WAKE_AFFINE target. 6791 */ 6792 if (want_affine && (tmp->flags & SD_WAKE_AFFINE) && 6793 cpumask_test_cpu(prev_cpu, sched_domain_span(tmp))) { 6794 if (cpu != prev_cpu) 6795 new_cpu = wake_affine(tmp, p, cpu, prev_cpu, sync); 6796 6797 sd = NULL; /* Prefer wake_affine over balance flags */ 6798 break; 6799 } 6800 6801 if (tmp->flags & sd_flag) 6802 sd = tmp; 6803 else if (!want_affine) 6804 break; 6805 } 6806 6807 if (unlikely(sd)) { 6808 /* Slow path */ 6809 new_cpu = find_idlest_cpu(sd, p, cpu, prev_cpu, sd_flag); 6810 } else if (sd_flag & SD_BALANCE_WAKE) { /* XXX always ? */ 6811 /* Fast path */ 6812 6813 new_cpu = select_idle_sibling(p, prev_cpu, new_cpu); 6814 6815 if (want_affine) 6816 current->recent_used_cpu = cpu; 6817 } 6818 rcu_read_unlock(); 6819 6820 return new_cpu; 6821 } 6822 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org