K 10 svn:author V 7 iedowse K 8 svn:date V 27 2005-01-23T17:42:48.000000Z K 7 svn:log V 258 Attempt to describe the race conditions that must be considered when using the callout subsystem. Show how the callout_pending(), callout_active() and callout_deactivate() macros can be used to achieve simpler race-free callout semantics in many situations. END