K 10 svn:author V 5 dyson K 8 svn:date V 27 1997-02-27T02:57:03.000000Z K 7 svn:log V 202 Fix the simple_lock problem with the physical I/O buffer code, and also fix the missing simple_unlock in vrele, and improve vrele/vput by merging them into one routine. BDE pointed these problems out. END