reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://github.com/l1k/linux/commit/3b1ea06a66a434dd110f54a47abf20ade761e4ed
        git remote add l1k https://github.com/l1k/linux
        git fetch --no-tags l1k pci-fixes-for-6.16
        git checkout 3b1ea06a66a434dd110f54a47abf20ade761e4ed
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-14.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=s390 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-14.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash