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/?id=c6047c2e3af68dae23ad884249e0d42ff28d2d1b
        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@intel.com>

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) {}
         |      ^~~~~~~~~~~~~~~~~~
>> kernel/sched/fair.c:10823:6: warning: no previous prototype for 'task_vruntime_update' [-Wmissing-prototypes]
   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