[$] The end of the 6.18 merge window

The 6.18 merge window has come to an end, bringing with it a total of 11,974non-merge commits, 3,499 of which came in after LWN'sfirst-half summary.The total is a little higher than the 6.17 merge window, which saw 11,404non-merge commits. There are once againa good number of changes and new features included in this release.