* install gcc-4.1-powerpc from http://debian.speedblue.org
* wget http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.20.4.tar.bz2
* untar and enter directory
* quilt import qnap.diff
* quilt push -a
* make ARCH=powerpc CROSS_COMPILE=powerpc-linux- vmlinux