"Google publishes that code under the Apache licence, but derives it from Linux source protected by the General Public Licence version 2 (GPLv2) claiming to remove all copyrighted components before changing the licence."
I don't follow this. They're saying that they take the GPL-ed Linux source, and strip out all copyrighted parts. Wouldn't that be all of it? The GPL only works because the code is copyrighted to the developers.