> Also note that the only valid version of the GPL as far as the kernel
> is concerned is _this_ particular version of the license (ie v2, not
> v2.2 or v3.x or whatever), unless explicitly otherwise stated.
Indeed, but there *are* places where "or later" is explicitly stated. It would be a major PITA to relicense to anything, but GPLv3 would be slightly easier for that reason.