reproduce (this is a W=1 build):
        git remote add mst-vhost https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git
        git fetch mst-vhost linux-next
        git checkout mst-vhost/linux-next
        b4 shazam https://lore.kernel.org/r/20231229073108.57778-17-xuanzhuo@linux.alibaba.com
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 olddefconfig
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/net/virtio/