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

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=b0... 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(a)intel.com&gt; All errors (new ones prefixed by >>): 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 256 258 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org