I'm on my phone so I can only do so much digging, but from the usbip sourceforge page that's linked above, it says that development has moved into the Linux ker

I'm on my phone so I can only do so much digging, but from the usbip sourceforge page that's linked above, it says that development has moved into the Linux kernel: For Linux, the source code of usbip was merged into the staging tree, and finally has been moved to the mainline since Linux-3.17. Development is ongoing in the kernel community, not here. Linux distributions will provide binary packages of usbip.*