Kernel prepatch 6.12-rc1

Linus has https://lwn.net/Articles/992184/
 and closed the
merge window for this release.


	Despite conference travel (both for me and several maintainers),
	things seemed to go mostly fairly normally. There's a couple of
	notable new features in here: For one thing, PREEMPT_RT is now
	mainlined and enabled as a config option (you do need to enable
	"EXPERT" to get the question). For another, sched_ext also got
	merged.


https://lwn.net/Articles/992185/