How can I browse linux kernel package source like I can other packages on Launchpad?

view story

http://askubuntu.com – I want to go here https://code.launchpad.net/ubuntu/+source/linux and see how the kernel is packaged. Specifically I think there may be an old debian patch still in there that is affecting my hardware. e.g. https://code.launchpad.net/ubuntu/+source/libevent shows the branches for the various releases and I can choose a branch and browse files. How can I do this for the Linux Kernel? (HowTos)