Kernel prepatch 6.8-rc7

The 6.8-rc7 kernel prepatch is out for
testing.

So we finally have a week where things have calmed down, and in
fact 6.8-rc7 is smaller than usual at this point in time. So if
that keeps up (but that's a fairly notable 'if') I won't feel like
I need to do an rc8 this release after all.

So no guarantees, but assuming no bad surprises, we'll have the
final 6.8 next weekend.