tree: https://android.googlesource.com/kernel/common android-4.19 head: 8b2fbd9076c7f12e34b73cd3e2ef69b6bea6fc09 commit: f609a2239f83f7c0d0da8a032922e04eaa8fb9c2 [33/37] ANDROID: sched/core: Move SchedTune task API into UtilClamp wrappers config: x86_64-randconfig-a015-20200823 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project b587ca93be114d07ec3bf654add97d7872325281) 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 # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu git checkout f609a2239f83f7c0d0da8a032922e04eaa8fb9c2 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 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:2515:6: warning: no previous prototype for function 'task_numa_work' [-Wmissing-prototypes] void task_numa_work(struct callback_head *work) ^ kernel/sched/fair.c:2515:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void task_numa_work(struct callback_head *work) ^ static kernel/sched/fair.c:2660:6: warning: no previous prototype for function 'task_tick_numa' [-Wmissing-prototypes] void task_tick_numa(struct rq *rq, struct task_struct *curr) ^ kernel/sched/fair.c:2660:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void task_tick_numa(struct rq *rq, struct task_struct *curr) ^ static kernel/sched/fair.c:3631:6: warning: no previous prototype for function 'sync_entity_load_avg' [-Wmissing-prototypes] void sync_entity_load_avg(struct sched_entity *se) ^ kernel/sched/fair.c:3631:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void sync_entity_load_avg(struct sched_entity *se) ^ static kernel/sched/fair.c:3644:6: warning: no previous prototype for function 'remove_entity_load_avg' [-Wmissing-prototypes] void remove_entity_load_avg(struct sched_entity *se) ^ kernel/sched/fair.c:3644:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void remove_entity_load_avg(struct sched_entity *se) ^ static kernel/sched/fair.c:5082:6: warning: no previous prototype for function 'init_cfs_bandwidth' [-Wmissing-prototypes] void init_cfs_bandwidth(struct cfs_bandwidth *cfs_b) {} ^ kernel/sched/fair.c:5082:1: 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 long schedtune_task_margin(struct task_struct *task) ^ kernel/sched/fair.c:5854:1: note: declare 'static' if the function is not intended to be used outside of this translation unit long schedtune_task_margin(struct task_struct *task) ^ static kernel/sched/fair.c:6527:15: warning: no previous prototype for function 'capacity_curr_of' [-Wmissing-prototypes] unsigned long capacity_curr_of(int cpu) ^ kernel/sched/fair.c:6527:1: note: declare 'static' if the function is not intended to be used outside of this translation unit unsigned long capacity_curr_of(int cpu) ^ static kernel/sched/fair.c:11163:6: 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:11163:1: 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:11165:5: 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:11165:1: 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:11170:6: 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:11170:1: 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:11172:6: 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:11172:1: 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 11 warnings generated. git remote add android-common https://android.googlesource.com/kernel/common git fetch --no-tags android-common android-4.19 git checkout f609a2239f83f7c0d0da8a032922e04eaa8fb9c2 vim +/schedtune_task_margin +5854 kernel/sched/fair.c 5853 5855 { 5856 int boost = schedtune_task_boost(task); 5857 unsigned long util; 5858 long margin; 5859 5860 if (boost == 0) 5861 return 0; 5862 5863 util = task_util_est(task); 5864 margin = schedtune_margin(util, boost); 5865 5866 return margin; 5867 } 5868 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org