reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://github.com/sean-jc/linux/commit/b9a199c65702bb4d0d6bc77c88198df60cdd940f
        git remote add sean-jc https://github.com/sean-jc/linux
        git fetch --no-tags sean-jc x86/stats_pointer
        git checkout b9a199c65702bb4d0d6bc77c88198df60cdd940f
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=s390 olddefconfig
        ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash