K 10 svn:author V 4 jeff K 8 svn:date V 27 2007-06-04T23:55:45.000000Z K 7 svn:log V 288 Commit 10/14 of sched_lock decomposition. - Add new spinlocks to support thread_lock() and adjust ordering. Tested by: kris, current@ Tested on: i386, amd64, ULE, 4BSD, libthr, libkse, PREEMPTION, etc. Discussed with: kris, attilio, kmacy, jhb, julian, bde (small parts each) END