[$] 4.13 Merge window, part 2

By corbet By the end of the 4.13 merge window, 11,258 non-merge changesets had
been pulled into the mainline repository — about 3,600 since the first half of this series was written.
That is nowhere near the 12,920 changesets that landed during the 4.12
merge window, but it still makes for a typically busy development cycle.
What follows is a summary of the more interesting changes found in those
last 3,600+ changesets.

From: LWN