tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/core head: 2dfdb3d20ad50e2ae2cb84cbceb0f0fc75e79e5d commit: 445d9e8ba05d5e9e4b26956b7fe529223e29d8d1 [13/19] sched: make struct sched_statistics independent of fair sched class config: nds32-buildonly-randconfig-r001-20210910 (attached as .config) compiler: nds32le-linux-gcc (GCC) 11.2.0 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 # https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?id=445d9e8ba05d5e9e4b26956b7fe529223e29d8d1 git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git git fetch --no-tags peterz-queue sched/core git checkout 445d9e8ba05d5e9e4b26956b7fe529223e29d8d1 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=nds32 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): kernel/sched/core.c: In function 'ttwu_stat': kernel/sched/core.c:3465:20: warning: variable 'rq' set but not used [-Wunused-but-set-variable] 3465 | struct rq *rq; | ^~ kernel/sched/core.c: In function 'cpu_cfs_stat_show': >> kernel/sched/core.c:10238:42: warning: variable 'stats' set but not used [-Wunused-but-set-variable] 10238 | struct sched_statistics *stats; | ^~~~~ vim +/stats +10238 kernel/sched/core.c 10227 10228 static int cpu_cfs_stat_show(struct seq_file *sf, void *v) 10229 { 10230 struct task_group *tg = css_tg(seq_css(sf)); 10231 struct cfs_bandwidth *cfs_b = &tg->cfs_bandwidth; 10232 10233 seq_printf(sf, "nr_periods %d\n", cfs_b->nr_periods); 10234 seq_printf(sf, "nr_throttled %d\n", cfs_b->nr_throttled); 10235 seq_printf(sf, "throttled_time %llu\n", cfs_b->throttled_time); 10236 10237 if (schedstat_enabled() && tg != &root_task_group) { 10238 struct sched_statistics *stats; 10239 u64 ws = 0; 10240 int i; 10241 10242 for_each_possible_cpu(i) { 10243 stats = __schedstats_from_se(tg->se[i]); 10244 ws += schedstat_val(stats->wait_sum); 10245 } 10246 10247 seq_printf(sf, "wait_sum %llu\n", ws); 10248 } 10249 10250 seq_printf(sf, "nr_bursts %d\n", cfs_b->nr_burst); 10251 seq_printf(sf, "burst_time %llu\n", cfs_b->burst_time); 10252 10253 return 0; 10254 } 10255 #endif /* CONFIG_CFS_BANDWIDTH */ 10256 #endif /* CONFIG_FAIR_GROUP_SCHED */ 10257 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org