Kernel prepatch 4.12-rc1

Linus has released the 4.12-rc1 prepatchand closed the merge window one day earlier than some might have expected."Despite it being fairly large, it has (so far) been pretty smooth. Idon't think I personally saw any breakage at all, which is alwaysnice. Usually I end up having something break, or trigger some sillybuild failure that really should have been noticed before it even gotto me, but so far things are looking good.Famous last words."