Kernel prepatch 6.7-rc8

So as expected, pretty much nothing happened over the holiday week. We've got literally just 45 files changed, and almost a third of those files aren't even kernel code (ie things like selftests, scripting, Kconfig and maintainer file updates). And some of the rest is prep-work and cleanups for future (real) changes.

But we do have a couple of real fixes in there, and I suspect we'll get a few more next week as people come back from their food-induced torpor.