It seems like they could work with upstream to figure out a way to restructure source files and add commented markup to make the process a lot easier. Not that

It seems like they could work with upstream to figure out a way to restructure source files and add commented markup to make the process a lot easier. Not that other people should do Google's work, but such changes could be beneficial to multiple people and organizations that need to build custom kernels, like realtime Linux, Xen, and hardened.