Linus Torvalds released
the 5.11-rc1 prepatch and closed the 5.11 merge window on
December 27. By that time, 12,498 non-merge changesets had been
pulled 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 still
a number of interesting features that found their way into the mainline.

Source: LWN.net – [$] 5.11 Merge window, part 2