[kbuild-all] kernel/sched/fair.c:10823:6: warning: no previous prototype for 'task_vruntime_update'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: d2f38a3c6507b2520101f9a3807ed98f1bdc545a commit: c6047c2e3af68dae23ad884249e0d42ff28d2d1b sched/fair: Snapshot the min_vruntime of CPUs on force idle date: 6 months ago config: arm64-randconfig-r012-20210928 (attached as .config) compiler: aarch64-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/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout c6047c2e3af68dae23ad884249e0d42ff28d2d1b # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=arm64 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:5359:6: warning: no previous prototype for 'init_cfs_bandwidth' [-Wmissing-prototypes] 5359 | void init_cfs_bandwidth(struct cfs_bandwidth *cfs_b) {} | ^~~~~~~~~~~~~~~~~~ 10823 | void task_vruntime_update(struct rq *rq, struct task_struct *p, bool in_fi) | ^~~~~~~~~~~~~~~~~~~~ kernel/sched/fair.c:11356:6: warning: no previous prototype for 'free_fair_sched_group' [-Wmissing-prototypes] 11356 | void free_fair_sched_group(struct task_group *tg) { } | ^~~~~~~~~~~~~~~~~~~~~ kernel/sched/fair.c:11358:5: warning: no previous prototype for 'alloc_fair_sched_group' [-Wmissing-prototypes] 11358 | int alloc_fair_sched_group(struct task_group *tg, struct task_group *parent) | ^~~~~~~~~~~~~~~~~~~~~~ kernel/sched/fair.c:11363:6: warning: no previous prototype for 'online_fair_sched_group' [-Wmissing-prototypes] 11363 | void online_fair_sched_group(struct task_group *tg) { } | ^~~~~~~~~~~~~~~~~~~~~~~ kernel/sched/fair.c:11365:6: warning: no previous prototype for 'unregister_fair_sched_group' [-Wmissing-prototypes] 11365 | void unregister_fair_sched_group(struct task_group *tg) { } | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/task_vruntime_update +10823 kernel/sched/fair.c 10822 10823 void task_vruntime_update(struct rq *rq, struct task_struct *p, bool in_fi) 10824 { 10825 struct sched_entity *se = &p->se; 10826 10827 if (p->sched_class != &fair_sched_class) 10828 return; 10829 10830 se_fi_update(se, rq->core->core_forceidle_seq, in_fi); 10831 } 10832 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org