[kbuild-all] [peterz-queue:sched/core-sched 29/29] core_sched.c:undefined reference to `sched_core_prealloc_fat'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/core-sched head: b417ddaf222294bcc35e9857105ab37d9b0fd715 commit: b417ddaf222294bcc35e9857105ab37d9b0fd715 [29/29] sched: prctl() and cgroup interaction config: s390-randconfig-r035-20210414 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 9829f5e6b1bca9b61efc629770d28bb9014dec45) 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 s390 cross compiling tool for clang build # apt-get install binutils-s390x-linux-gnu # 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-sched git checkout b417ddaf222294bcc35e9857105ab37d9b0fd715 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=s390 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 >>): s390x-linux-gnu-ld: kernel/sched/core_sched.o: in function `sched_core_share_pid': --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org