[$] 5.12 merge window, part 2

The 5.12 merge window closed with the release of 5.12-rc1on February 28; this released followed the normal schedule despite thefact that Linus Torvalds had been without power for the first six daysafter 5.11 came out. At that point, 10,886 non-merge changesets had foundtheir way into the mainline repository; about 2,000 of those showed upafter the first-half merge-window summarywas written. The pace of merging obviously slowed down, but there werestill a number of interesting features to be found in those patches.