[$] The rest of the 6.13 merge window

The 6.13 merge window closed with the release of 6.13-rc1 on December1. By that time,11,307 non-merge commits had been pulled into the mainlinerepository; about 9,500 of those landed after our first-half merge-window summary waswritten. There was a lot of new material in these patches, includingarchitecture-support improvements, new BPF features, an efficient way toadd guard pages to an address space, more Rust support, a vast number ofnew device drivers, and more.