K 10 svn:author V 3 jhb K 8 svn:date V 27 2006-02-23T19:13:12.000000Z K 7 svn:log V 243 Use the recently added msleep_spin() function to simplify the callout_drain() logic. We no longer need a separate non-spin mutex to do sleep/wakeup with, instead we can now just use the one spin mutex to manage all the callout functionality. END