Update notes for submitted changes

* selinux: add a ugly workaround to bail early
* slub: fix a memory leak in get_partial_node()
* mutex: Back out architecture specific check for negative mutex count
* mutex: Queue mutex spinners with MCS lock to reduce cacheline contention
* mutex: Make more scalable by doing less atomic operations
* mutex: Move mutex spinning code from sched/core.c back to mutex.c
* kthread: implement probe_kthread_data()
* kthread: kill task_get_live_kthread()
* kthread: introduce to_live_kthread()