[tip:sched/urgent 3/5] kernel/sched/rt.c:257:6: error: no previous prototype for function 'unregister_rt_sched_group'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched/urgent
head:   a8b76910e465d718effce0cad306a21fa4f3526b
commit: b027789e5e50494c2325cc70c8642e7fd6059479 [3/5] sched/fair: Prevent dead task groups from regaining cfs_rq's
config: i386-buildonly-randconfig-r001-20211112 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 63ef0e17e28827eae53133b3467bdac7d9729318)
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/tip/tip.git/commit/?id=b027789e5e50494c2325cc70c8642e7fd6059479
        git remote add tip https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git
        git fetch --no-tags tip sched/urgent
        git checkout b027789e5e50494c2325cc70c8642e7fd6059479
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=i386 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

>> kernel/sched/rt.c:257:6: error: no previous prototype for function 'unregister_rt_sched_group' [-Werror,-Wmissing-prototypes]
   void unregister_rt_sched_group(struct task_group *tg) { }
        ^
   kernel/sched/rt.c:257:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void unregister_rt_sched_group(struct task_group *tg) { }
   ^
   static 
   kernel/sched/rt.c:259:6: error: no previous prototype for function 'free_rt_sched_group' [-Werror,-Wmissing-prototypes]
   void free_rt_sched_group(struct task_group *tg) { }
        ^
   kernel/sched/rt.c:259:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void free_rt_sched_group(struct task_group *tg) { }
   ^
   static 
   kernel/sched/rt.c:261:5: error: no previous prototype for function 'alloc_rt_sched_group' [-Werror,-Wmissing-prototypes]
   int alloc_rt_sched_group(struct task_group *tg, struct task_group *parent)
       ^
   kernel/sched/rt.c:261:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int alloc_rt_sched_group(struct task_group *tg, struct task_group *parent)
   ^
   static 
   kernel/sched/rt.c:675:6: error: no previous prototype for function 'sched_rt_bandwidth_account' [-Werror,-Wmissing-prototypes]
   bool sched_rt_bandwidth_account(struct rt_rq *rt_rq)
        ^
   kernel/sched/rt.c:675:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   bool sched_rt_bandwidth_account(struct rt_rq *rt_rq)
   ^
   static 
   4 errors generated.


vim +/unregister_rt_sched_group +257 kernel/sched/rt.c

   256	
 > 257	void unregister_rt_sched_group(struct task_group *tg) { }
   258	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

Attachment: .config.gz
Description: application/gzip