tree: https://android.googlesource.com/kernel/common android13-5.15 head: 81a0b5826138b3314eea90bcec18f5822b0a3575 commit: ca2177d4a03ddc4e6b64e54e0e7a176e282b4e18 [6/8] ANDROID: sched: allow access to critical common code for CPU Pause config: i386-buildonly-randconfig-r004-20211110 (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 git remote add android-common https://android.googlesource.com/kernel/common git fetch --no-tags android-common android13-5.15 git checkout ca2177d4a03ddc4e6b64e54e0e7a176e282b4e18 # 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 warnings (new ones prefixed by >>): struct rq *__migrate_task(struct rq *rq, struct rq_flags *rf, ^ kernel/sched/core.c:2308:1: note: declare 'static' if the function is not intended to be used outside of this translation unit struct rq *__migrate_task(struct rq *rq, struct rq_flags *rf, ^ static kernel/sched/core.c:3459:6: warning: no previous prototype for function 'sched_set_stop_task' [-Wmissing-prototypes] void sched_set_stop_task(int cpu, struct task_struct *stop) ^ kernel/sched/core.c:3459:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void sched_set_stop_task(int cpu, struct task_struct *stop) ^ static 2 warnings generated. vim +/__migrate_task +2308 kernel/sched/core.c 2298 2299 /* 2300 * Move (not current) task off this CPU, onto the destination CPU. We're doing 2301 * this because either it can't run here any more (set_cpus_allowed() 2302 * away from this CPU, or CPU going down), or because we're 2303 * attempting to rebalance this task on exec (sched_exec). 2304 * 2305 * So we race with normal scheduler movements, but that's OK, as long 2306 * as the task is no longer on this CPU. 2307 */ 2309 struct task_struct *p, int dest_cpu) 2310 { 2311 /* Affinity changed (again). */ 2312 if (!is_cpu_allowed(p, dest_cpu)) 2313 return rq; 2314 2315 update_rq_clock(rq); 2316 rq = move_queued_task(rq, rf, p, dest_cpu); 2317 2318 return rq; 2319 } 2320 EXPORT_SYMBOL_GPL(__migrate_task); 2321 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org