tree: https://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux.git coresched head: 08584c8e5f653b2f341504289f843d576c83893e commit: 6d509d1335129285644318491bcce431d0e30fd1 [14/24] sched: migration changes for core scheduling config: nds32-randconfig-r035-20210112 (attached as .config) compiler: nds32le-linux-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 # https://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux.git/commit/?i... git remote add jfern https://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux.git git fetch --no-tags jfern coresched git checkout 6d509d1335129285644318491bcce431d0e30fd1 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=nds32 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from kernel/sched/psi.c:143: 1223 | struct sched_group *group) | ^~~~~~~~~~~ -- In file included from kernel/sched/core.c:13: 1223 | struct sched_group *group) | ^~~~~~~~~~~ kernel/sched/core.c: In function 'ttwu_stat': kernel/sched/core.c:3108:13: warning: variable 'rq' set but not used [-Wunused-but-set-variable] 3108 | struct rq *rq; | ^~ kernel/sched/core.c: In function 'schedule_tail': kernel/sched/core.c:4452:13: warning: variable 'rq' set but not used [-Wunused-but-set-variable] 4452 | struct rq *rq; | ^~ -- In file included from kernel/sched/rt.c:6: 1223 | struct sched_group *group) | ^~~~~~~~~~~ kernel/sched/rt.c:669:6: warning: no previous prototype for 'sched_rt_bandwidth_account' [-Wmissing-prototypes] 669 | bool sched_rt_bandwidth_account(struct rt_rq *rt_rq) | ^~~~~~~~~~~~~~~~~~~~~~~~~~ vim +1223 kernel/sched/sched.h 1220 1221 static inline bool sched_group_cookie_match(struct rq *rq, 1222 struct task_struct *p, 1224 { 1225 return true; 1226 } 1227 #endif /* CONFIG_SCHED_CORE */ 1228 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org