I’ve worked across a fairly large chunk of the kernel at different times. At the moment I’m trying to finish reworking the terminal layer, locking and fixing the remaining races and bugs in this area. It’s basically a nasty, horrible technical problem that isn’t exciting and not many other people care about.
Other than that I’m currently trying to get stable 2D graphics support for the various Imagination-based, graphics-based devices shipped by Intel, and on a one man mission to clean up the kernel bugzilla.