[$] The rest of the 6.13 merge window

The 6.13 merge window closed with the release of 6.13-rc1 on December 1. By that time,
11,307 non-merge commits had been pulled into the mainline
repository; about 9,500 of those landed after our first-half merge-window summary was
written. There was a lot of new material in these patches, including
architecture-support improvements, new BPF features, an efficient way to
add guard pages to an address space, more Rust support, a vast number of
new device drivers, and more.