--- xnu/xnu-2050.22.13/iokit/Kernel/IOEventSource.cpp
+++ xnu/xnu-1228/iokit/Kernel/IOEventSource.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998-2000, 2009 Apple Inc. All rights reserved.
+ * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
@@ -40,7 +40,6 @@
 #define super OSObject
 
 OSDefineMetaClassAndAbstractStructors(IOEventSource, OSObject)
-
 OSMetaClassDefineReservedUnused(IOEventSource, 0);
 OSMetaClassDefineReservedUnused(IOEventSource, 1);
 OSMetaClassDefineReservedUnused(IOEventSource, 2);
@@ -50,88 +49,15 @@
 OSMetaClassDefineReservedUnused(IOEventSource, 6);
 OSMetaClassDefineReservedUnused(IOEventSource, 7);
 
-bool IOEventSource::checkForWork() { return false; }
-
 /* inline function implementations */
-
-#if IOKITSTATS
-
-#define IOStatisticsRegisterCounter() \
-do { \
-	reserved->counter = IOStatistics::registerEventSource(inOwner); \
-} while (0)
-
-#define IOStatisticsUnregisterCounter() \
-do { \
-	if (reserved) \
-		IOStatistics::unregisterEventSource(reserved->counter); \
-} while (0)
-
-#define IOStatisticsOpenGate() \
-do { \
-	IOStatistics::countOpenGate(reserved->counter); \
-} while (0)
-
-#define IOStatisticsCloseGate() \
-do { \
-	IOStatistics::countCloseGate(reserved->counter); \
-} while (0)
-
-#else
-
-#define IOStatisticsRegisterCounter()
-#define IOStatisticsUnregisterCounter()
-#define IOStatisticsOpenGate()
-#define IOStatisticsCloseGate()
-
-#endif /* IOKITSTATS */
-
-void IOEventSource::signalWorkAvailable() 
-{ 
-	workLoop->signalWorkAvailable(); 
-}
-
-void IOEventSource::openGate() 
-{ 
-	IOStatisticsOpenGate();
-	workLoop->openGate(); 
-}
-
-void IOEventSource::closeGate()	
-{ 
-	workLoop->closeGate(); 
-	IOStatisticsCloseGate(); 
-}
-
-bool IOEventSource::tryCloseGate() 
-{ 
-	bool res; 
-	if ((res = workLoop->tryCloseGate())) {
-		IOStatisticsCloseGate(); 
-	}
-	return res; 
-}
-
+void IOEventSource::signalWorkAvailable()	{ workLoop->signalWorkAvailable(); }
+void IOEventSource::openGate()			{ workLoop->openGate(); }
+void IOEventSource::closeGate()			{ workLoop->closeGate(); }
+bool IOEventSource::tryCloseGate()		{ return workLoop->tryCloseGate(); }
 int IOEventSource::sleepGate(void *event, UInt32 type)
-{ 
-	bool res; 
-	IOStatisticsOpenGate(); 
-	res = workLoop->sleepGate(event, type); 
-	IOStatisticsCloseGate(); 
-	return res; 
-}
-
-int IOEventSource::sleepGate(void *event, AbsoluteTime deadline, UInt32 type)
-{ 
-	bool res; 
-	IOStatisticsOpenGate(); 
-	res = workLoop->sleepGate(event, deadline, type);
-	IOStatisticsCloseGate(); 
-	return res; 
-}
-  
-void IOEventSource::wakeupGate(void *event, bool oneThread) { workLoop->wakeupGate(event, oneThread); }
-
+        { return workLoop->sleepGate(event, type); }
+void IOEventSource::wakeupGate(void *event, bool oneThread)
+        { workLoop->wakeupGate(event, oneThread); }
 
 bool IOEventSource::init(OSObject *inOwner,
                          Action inAction)
@@ -147,26 +73,7 @@
     (void) setAction(inAction);
     enabled = true;
 
-    if(!reserved) {
-        reserved = IONew(ExpansionData, 1);
-        if (!reserved) {
-            return false;
-        }
-    }
-
-    IOStatisticsRegisterCounter();
-		
     return true;
-}
-
-void IOEventSource::free( void )
-{
-    IOStatisticsUnregisterCounter();
-	
-    if (reserved)
-		IODelete(reserved, ExpansionData, 1);
-
-    super::free();
 }
 
 IOEventSource::Action IOEventSource::getAction () const { return action; };