reproduce (this is a W=1 build):
        git remote add song-md https://git.kernel.org/pub/scm/linux/kernel/git/song/md.git
        git fetch song-md md-next
        git checkout song-md/md-next
        b4 shazam https://lore.kernel.org/r/20241003180040.6808-1-paulluselinux@gmail.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 drivers/md/ drivers/net/ethernet/