This page is dedicated towards documentation to all backports components.
There are currently two components to the backports effort.
compat is a shared module / headers that implements newer features for usage on older kernels.
compat-drivers is the framework that pulls code from the Linux kernel, adds the compat module and backports features that compat could not backport within its module / headers.
Hacking on the project
Read the hacking documentation.
Read the hacking TODO for a list of wish items we should be working towards.