tree: https://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux.git coresched head: 4dbdf2010d3452bbc7f7c64a71f5ffdf07282334 commit: d462fdee392d1ff2498aa88b5d611066dcb0e35c [14/24] sched: Improve snapshotting of min_vruntime for CGroups config: i386-randconfig-r026-20210115 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # 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 d462fdee392d1ff2498aa88b5d611066dcb0e35c # save the attached .config to linux build tree make W=1 ARCH=i386 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 >>): kernel/sched/fair.c: In function 'se_fi_update': kernel/sched/fair.c:10736:12: warning: unused variable 'new' [-Wunused-variable] 10736 | long old, new; | ^~~ kernel/sched/fair.c:10736:7: warning: unused variable 'old' [-Wunused-variable] 10736 | long old, new; | ^~~ kernel/sched/fair.c:10735:7: warning: unused variable 'root' [-Wunused-variable] 10735 | bool root = true; | ^~~~ kernel/sched/fair.c: At top level: 10751 | void task_vruntime_update(struct rq *rq, struct task_struct *p, bool in_fi) | ^~~~~~~~~~~~~~~~~~~~ vim +/task_vruntime_update +10751 kernel/sched/fair.c 10750 10751 void task_vruntime_update(struct rq *rq, struct task_struct *p, bool in_fi) 10752 { 10753 struct sched_entity *se = &p->se; 10754 10755 if (p->sched_class != &fair_sched_class) 10756 return; 10757 10758 se_fi_update(se, rq->core->core_forceidle_seq, in_fi); 10759 } 10760 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org