Kernel prepatch 3.7-rc4

The 37-rc4 prepatch has been released.
Linus says: "Perhaps notable just because of the noise it caused in certain
circles, there's the ext4 bitmap journaling fix for the issue that
caused such a ruckus. It's a tiny patch and despite all the noise
about it you couldn't actually trigger the problem unless you were
doing crazy things with special mount options."