reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core.git/commit/?id=eea5d2bb34ba11dccd9c53f392dc50cf060150a9
        git remote add driver-core https://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core.git
        git fetch --no-tags driver-core driver-core-testing
        git checkout eea5d2bb34ba11dccd9c53f392dc50cf060150a9

        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests

        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-20 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=x86_64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-20 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/kernel/ arch/x86/mm/ arch/x86/pci/ certs/ drivers/acpi/ drivers/base/ drivers/cpufreq/ drivers/cpuidle/ drivers/iommu/intel/ drivers/leds/ drivers/mailbox/ drivers/md/ drivers/net/ethernet/chelsio/cxgb4/ drivers/net/ethernet/intel/e1000/ drivers/net/ethernet/intel/e1000e/ drivers/net/ethernet/intel/i40e/ drivers/net/ethernet/intel/igb/ drivers/net/ethernet/intel/igbvf/ drivers/net/ethernet/intel/igc/ drivers/net/ethernet/intel/ixgbe/ drivers/net/ethernet/intel/ixgbevf/ drivers/net/ethernet/micrel/ drivers/net/ethernet/via/ drivers/net/phy/ drivers/pci/pcie/ drivers/scsi/ drivers/tty/serial/ fs/9p/ fs/crypto/ fs/kernfs/ fs/nfs/ fs/nfsd/ init/ ipc/ kernel/ mm/ net/9p/ net/devlink/