What is the diferences with compat-driver with u and without u
https://www.kernel.org/pub/linux/ker...3-04-u.tar.bz2
https://www.kernel.org/pub/linux/ker...3-03-0.tar.bz2
https://www.kernel.org/pub/linux/ker...3-04-u.tar.bz2
https://www.kernel.org/pub/linux/ker...3-03-0.tar.bz2