[$] 5.11 Merge window, part 2

Linus Torvalds releasedthe 5.11-rc1 prepatch and closed the 5.11 merge window onDecember 27. By that time, 12,498 non-merge changesets had beenpulled into the mainline; nearly 2,500 of those wandered in after the first merge-window summary was written.Activity slowed down in the second week, as expected, but there were stilla number of interesting features that found their way into the mainline.