tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/core head: bf8d9ef490e0600b3b30ac2244858ecd327123ab commit: bf8d9ef490e0600b3b30ac2244858ecd327123ab [29/29] sched: Move cfs_bandwidth_slice sysctls to fair.c config: hexagon-randconfig-r045-20220209 (https://download.01.org/0day-ci/archive/20220209/202202092107.WdTEsmSF-lk...) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project e8bff9ae54a55b4dbfeb6ba55f723abbd81bf494) 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/peterz/queue.git/commit/?... git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git git fetch --no-tags peterz-queue sched/core git checkout bf8d9ef490e0600b3b30ac2244858ecd327123ab # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash kernel/sched/ 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 >>): sched_cfs_bandwidth_sysctl_init(); ^ kernel/sched/fair.c:652:5: warning: no previous prototype for function 'sched_update_scaling' [-Wmissing-prototypes] int sched_update_scaling(void) ^ kernel/sched/fair.c:652:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int sched_update_scaling(void) ^ static kernel/sched/fair.c:5469:6: warning: no previous prototype for function 'init_cfs_bandwidth' [-Wmissing-prototypes] void init_cfs_bandwidth(struct cfs_bandwidth *cfs_b) {} ^ kernel/sched/fair.c:5469:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void init_cfs_bandwidth(struct cfs_bandwidth *cfs_b) {} ^ static kernel/sched/fair.c:11694:6: warning: no previous prototype for function 'free_fair_sched_group' [-Wmissing-prototypes] void free_fair_sched_group(struct task_group *tg) { } ^ kernel/sched/fair.c:11694:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void free_fair_sched_group(struct task_group *tg) { } ^ static kernel/sched/fair.c:11696:5: warning: no previous prototype for function 'alloc_fair_sched_group' [-Wmissing-prototypes] int alloc_fair_sched_group(struct task_group *tg, struct task_group *parent) ^ kernel/sched/fair.c:11696:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int alloc_fair_sched_group(struct task_group *tg, struct task_group *parent) ^ static kernel/sched/fair.c:11701:6: warning: no previous prototype for function 'online_fair_sched_group' [-Wmissing-prototypes] void online_fair_sched_group(struct task_group *tg) { } ^ kernel/sched/fair.c:11701:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void online_fair_sched_group(struct task_group *tg) { } ^ static kernel/sched/fair.c:11703:6: warning: no previous prototype for function 'unregister_fair_sched_group' [-Wmissing-prototypes] void unregister_fair_sched_group(struct task_group *tg) { } ^ kernel/sched/fair.c:11703:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void unregister_fair_sched_group(struct task_group *tg) { } ^ static 6 warnings and 1 error generated. vim +/sched_cfs_bandwidth_sysctl_init +230 kernel/sched/fair.c 226 227 void __init sched_init_granularity(void) 228 { 229 update_sysctl(); 231 } 232 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org