Kernel prepatch 6.12-rc1

Linus has released 6.12-rc1 and closed themerge window for this release.

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