While we are just starting to see the first hints of Lollipop on the HTC One M8 in the US, the rollout is already underway in other parts of the world. As is customary, HTC is now posting the open source bits of these updates on its developer page. If you want to get a look at the kernel source for the international M8 variants, this is your chance.
HTC's site already has almost a full page of Lollipop kernels for regions like the EU, Nordic countries, and the Middle East. All the downloads are 524-534MB and are based on Android 5.0.1. These won't be of much use to regular users, but developers will probably be interested in poking around.