tree: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git pending-5.16 head: 51f919289215d09b2aeca5dc7f27639f21ad7d1e commit: b765f44bc5887dafdcc7eeb33cee10d448cd1f2a [35/73] sched/pelt: Relax the sync of runnable_sum with runnable_avg config: hexagon-randconfig-r045-20220211 (https://download.01.org/0day-ci/archive/20220212/202202120708.NYXhtjUK-lk...) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project f6685f774697c85d6a352dcea013f46a99f9fe31) 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 # https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git/c... git remote add sashal-stable https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git git fetch --no-tags sashal-stable pending-5.16 git checkout b765f44bc5887dafdcc7eeb33cee10d448cd1f2a # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash 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 >>): cfs_rq->avg.util_sum = cfs_rq->avg.util_avg * divider; ^ kernel/sched/fair.c:5458:6: warning: no previous prototype for function 'init_cfs_bandwidth' [-Wmissing-prototypes] void init_cfs_bandwidth(struct cfs_bandwidth *cfs_b) {} ^ kernel/sched/fair.c:5458:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void init_cfs_bandwidth(struct cfs_bandwidth *cfs_b) {} ^ static kernel/sched/fair.c:11731:6: warning: no previous prototype for function 'free_fair_sched_group' [-Wmissing-prototypes] void free_fair_sched_group(struct task_group *tg) { } ^ kernel/sched/fair.c:11731:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void free_fair_sched_group(struct task_group *tg) { } ^ static kernel/sched/fair.c:11733:5: warning: no previous prototype for function 'alloc_fair_sched_group' [-Wmissing-prototypes] int alloc_fair_sched_group(struct task_group *tg, struct task_group *parent) ^ kernel/sched/fair.c:11733:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int alloc_fair_sched_group(struct task_group *tg, struct task_group *parent) ^ static kernel/sched/fair.c:11738:6: warning: no previous prototype for function 'online_fair_sched_group' [-Wmissing-prototypes] void online_fair_sched_group(struct task_group *tg) { } ^ kernel/sched/fair.c:11738:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void online_fair_sched_group(struct task_group *tg) { } ^ static kernel/sched/fair.c:11740:6: warning: no previous prototype for function 'unregister_fair_sched_group' [-Wmissing-prototypes] void unregister_fair_sched_group(struct task_group *tg) { } ^ kernel/sched/fair.c:11740:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void unregister_fair_sched_group(struct task_group *tg) { } ^ static 5 warnings and 1 error generated. vim +/divider +3796 kernel/sched/fair.c a05e8c51ff097ff Byungchul Park 2015-08-20 3783 3d30544f02120b8 Peter Zijlstra 2016-06-21 3784 /** 3d30544f02120b8 Peter Zijlstra 2016-06-21 3785 * detach_entity_load_avg - detach this entity from its cfs_rq load avg 3d30544f02120b8 Peter Zijlstra 2016-06-21 3786 * @cfs_rq: cfs_rq to detach from 3d30544f02120b8 Peter Zijlstra 2016-06-21 3787 * @se: sched_entity to detach 3d30544f02120b8 Peter Zijlstra 2016-06-21 3788 * 3d30544f02120b8 Peter Zijlstra 2016-06-21 3789 * Must call update_cfs_rq_load_avg() before this, since we rely on 3d30544f02120b8 Peter Zijlstra 2016-06-21 3790 * cfs_rq->avg.last_update_time being current. 3d30544f02120b8 Peter Zijlstra 2016-06-21 3791 */ a05e8c51ff097ff Byungchul Park 2015-08-20 3792 static void detach_entity_load_avg(struct cfs_rq *cfs_rq, struct sched_entity *se) a05e8c51ff097ff Byungchul Park 2015-08-20 3793 { 8d5b9025f9b4500 Peter Zijlstra 2017-08-24 3794 dequeue_load_avg(cfs_rq, se); 897418922215915 Peter Zijlstra 2016-06-16 3795 sub_positive(&cfs_rq->avg.util_avg, se->avg.util_avg); fcf6631f3736985 Vincent Guittot 2021-06-01 @3796 cfs_rq->avg.util_sum = cfs_rq->avg.util_avg * divider; 9f68395333ad7f5 Vincent Guittot 2020-02-24 3797 sub_positive(&cfs_rq->avg.runnable_avg, se->avg.runnable_avg); b765f44bc5887da Vincent Guittot 2022-01-11 3798 sub_positive(&cfs_rq->avg.runnable_sum, se->avg.runnable_sum); b765f44bc5887da Vincent Guittot 2022-01-11 3799 /* See update_cfs_rq_load_avg() */ b765f44bc5887da Vincent Guittot 2022-01-11 3800 cfs_rq->avg.runnable_sum = max_t(u32, cfs_rq->avg.runnable_sum, b765f44bc5887da Vincent Guittot 2022-01-11 3801 cfs_rq->avg.runnable_avg * PELT_MIN_DIVIDER); 0e2d2aaaae52c24 Peter Zijlstra 2017-05-08 3802 0e2d2aaaae52c24 Peter Zijlstra 2017-05-08 3803 add_tg_cfs_propagate(cfs_rq, -se->avg.load_sum); a2c6c91f98247fe Steve Muckle 2016-03-24 3804 ea14b57e8a181ac Peter Zijlstra 2018-02-02 3805 cfs_rq_util_change(cfs_rq, 0); ba19f51fcb549c7 Qais Yousef 2019-06-04 3806 ba19f51fcb549c7 Qais Yousef 2019-06-04 3807 trace_pelt_cfs_tp(cfs_rq); a05e8c51ff097ff Byungchul Park 2015-08-20 3808 } a05e8c51ff097ff Byungchul Park 2015-08-20 3809 :::::: The code at line 3796 was first introduced by commit :::::: fcf6631f3736985ec89bdd76392d3c7bfb60119f sched/pelt: Ensure that *_sum is always synced with *_avg :::::: TO: Vincent Guittot <vincent.guittot(a)linaro.org&gt; :::::: CC: Peter Zijlstra <peterz(a)infradead.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org