reproduce:
        git checkout 052d534373b7ed33712a63d5e17b2b6cdbce84fd
        b4 shazam https://lore.kernel.org/r/20240116-ml-topic-u9p-v1-2-ad8c306f9a4e@pengutronix.de
        # 1. reproduce by kismet
           # install kmax per https://github.com/paulgazz/kmax/blob/master/README.md
           kismet --linux-ksrc=linux --selectees CONFIG_NET_9P --selectors CONFIG_USB_9PFS -a=alpha
        # 2. reproduce by make
           # save the config file to linux source tree
           cd linux
           make ARCH=alpha olddefconfig