One more 3.7 prepatch

Linus has, contrary to his original plan, sent out one more 3.7 prepatch in
the form of 3.7-rc8. "I really
didn't want it to come to this, but I was uncomfortable doing the 3.7
release yesterday due to last-minute issues, and decided to sleep on it.
And today, I ended up even *less* comfortable about it due to the
resurrection of a kswapd issue, so I decided that I'm going to do another
-rc after all." As he points out, that implies that the 3.8 merge
window will run close to the holidays.