reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://git.kernel.org/pub/scm/linux/kernel/git/mic/linux.git/commit/?id=6d68ea6cbd868fb93342bfd6aa99ce6a5c33a817
        git remote add mic https://git.kernel.org/pub/scm/linux/kernel/git/mic/linux.git
        git fetch --no-tags mic landlock-audit
        git checkout 6d68ea6cbd868fb93342bfd6aa99ce6a5c33a817
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-14.1.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=s390 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-14.1.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash