K 10 svn:author V 7 thompsa K 8 svn:date V 27 2009-02-22T01:02:25.511602Z K 7 svn:log V 192 Use root_mount_hold and root_mount_rel to allow the USB bus to be explored before trying to mount root. Unlike USB1 the busses are not explored at attach but rather after threads are running. END