reproduce (this is a W=1 build):
        git checkout next-20240215
        b4 shazam https://lore.kernel.org/r/20240215145602.1371274-15-max.kellermann@ionos.com
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=um olddefconfig
        make W=1 O=build_dir ARCH=um SHELL=/bin/bash arch/um/drivers/ drivers/comedi/ drivers/dma/ drivers/iommu/iommufd/ drivers/ntb/ drivers/spi/ drivers/tty/serial/ lib/