Yeah, even if there _weren't_ (arguable, debatable) license incompatabilities, the ZFS team doesn't _want_ it to be just a linux submodule, they want it to be an independent thing that can be used with other OSs too, no? So it's really just part of the challenge of doing _that_, regardless of legal license issues. No?
I don't see how ZoL being the canonical ZFS repository means ZFS is now "just a linux submodule". No, it's a Git repository that easily could (and will, no doubt) support building for multiple target systems.
