To make it worse - it looks like Kobo backports patches from newer IMX kernels, into their 2.6.xx kernel.
So diffing even kernels of the same version is basically impossible.
I'm tempted just to email Kobo and ask "Can I have a tarball of the git repo, plus history."
and do the same for IMX.
Then maybe I'd know what is Kobo unique patches that I can port into the IMX kernel.
I found this today: https://www.mobileread.com/forums/showthread.php?t=325901
- and I feel like I should go write up and dump all my research online somewhere.
Because theres loads of resources for building on top of the provided 2.6xx kernel Kobo provides, but obviously, thats less than desirable for keep the device usable & secure into the future.
Clearly I'm not the only one who wants this to happen.
Perhaps I just don't have the skills to take it forward and someone else can help!
social.samathy.space is one server in the network