Kernel prepatch 4.4-rc2

The second 4.4 prepatch is out for testing.Linus says: "Things are looking fairly normal in 4.4-land, with nohuge surprises in rc2. There were a couple of late features: parischugepage support and some late slub bulk allocator patches were not onlymerged at the end of the week, but they strictly speaking should have beenmerge window things."