--- xnu/xnu-1228/iokit/Kernel/IOPMPowerStateQueue.cpp
+++ xnu/xnu-792.21.3/iokit/Kernel/IOPMPowerStateQueue.cpp
@@ -27,47 +27,9 @@
  */
  
 #include "IOPMPowerStateQueue.h"
-#include "IOKit/IOLocks.h"
 #undef super
 #define super IOEventSource
 OSDefineMetaClassAndStructors(IOPMPowerStateQueue, IOEventSource);
-
-#ifndef __ppc__ /* ppc does this right and doesn't need these routines */
-static
-void *	OSDequeueAtomic(void * volatile * inList, SInt32 inOffset)
-{	
-	/* The _pointer_ is volatile, not the listhead itself */
-	void * volatile	oldListHead;
-	void * volatile	newListHead;
-
-	do {
-		oldListHead = *inList;
-		if (oldListHead == NULL) {
-			break;
-		}
-		
-		newListHead = *(void * volatile *) (((char *) oldListHead) + inOffset);
-	} while (! OSCompareAndSwap((UInt32)oldListHead,
-					(UInt32)newListHead, (volatile UInt32 *)inList));
-	return oldListHead;
-}
-
-static
-void	OSEnqueueAtomic(void * volatile * inList, void * inNewLink, SInt32 inOffset)
-{
-	/* The _pointer_ is volatile, not the listhead itself */
-	void *	volatile oldListHead;
-	void *	volatile newListHead = inNewLink;
-	void * volatile *	newLinkNextPtr = (void * volatile *) (((char *) inNewLink) + inOffset);
-
-	do {
-		oldListHead = *inList;
-		*newLinkNextPtr = oldListHead;
-	} while (! OSCompareAndSwap((UInt32)oldListHead, (UInt32)newListHead,
-					(volatile UInt32 *)inList));
-}
-#endif /* ! __ppc__ */
-
 
 IOPMPowerStateQueue *IOPMPowerStateQueue::PMPowerStateQueue(OSObject *inOwner)
 {
@@ -88,9 +50,7 @@
 
     // Queue of powerstate changes
     changes = NULL;
-#ifndef __ppc__
-    if (!(tmpLock = IOLockAlloc()))  panic("IOPMPowerStateQueue::init can't alloc lock");
-#endif
+
     return true;
 }
 
@@ -107,62 +67,24 @@
     new_one->target = inTarget;
     
     // Change to queue
-#ifndef __ppc__
-    IOLockLock(tmpLock);
-#endif
     OSEnqueueAtomic((void **)&changes, (void *)new_one, 0);
-#ifndef __ppc__
-    IOLockUnlock(tmpLock);
-#endif
+    
     signalWorkAvailable();
 
     return true;
 }
 
-bool IOPMPowerStateQueue::featureChangeOccurred(
-    uint32_t inState, 
-    IOService *inTarget)
-{
-    PowerChangeEntry             *new_one = NULL;
-
-    new_one = (PowerChangeEntry *)IOMalloc(sizeof(PowerChangeEntry));
-    if(!new_one) return false;
-    
-    new_one->actionType = IOPMPowerStateQueue::kPMFeatureChange;
-    new_one->state = inState;
-    new_one->target = inTarget;
-    
-    // Change to queue
-#ifdef __i386__
-    IOLockLock(tmpLock);
-#endif
-    OSEnqueueAtomic((void **)&changes, (void *)new_one, 0);
-#ifdef __i386__
-    IOLockUnlock(tmpLock);
-#endif
-    signalWorkAvailable();
-
-    return true;
-}
-
-
 // checkForWork() is called in a gated context
 bool IOPMPowerStateQueue::checkForWork()
 {
     PowerChangeEntry            *theNode;
-    uint32_t                    theState;
+    int                         theState;
     IOService                   *theTarget;
-    uint16_t                    theAction;
+    UInt16                      theAction;
     
     // Dequeue and process the state change request
-#ifndef __ppc__
-    IOLockLock(tmpLock);
-#endif
     if((theNode = (PowerChangeEntry *)OSDequeueAtomic((void **)&changes, 0)))
     {
-#ifndef __ppc__
-      IOLockUnlock(tmpLock);
-#endif
         theState = theNode->state;
         theTarget = theNode->target;
         theAction = theNode->actionType;
@@ -171,19 +93,11 @@
         switch (theAction)
         {
             case kUnIdle:
-                theTarget->command_received((void *)theState, 0, 0, 0);
-                break;
-                
-            case kPMFeatureChange:
-                theTarget->messageClients(theState, theTarget);
+                theTarget->command_received(theState, 0, 0, 0);
                 break;
         }
     }
-#ifndef __ppc__
-    else {
-      IOLockUnlock(tmpLock);
-    }
-#endif
+
     // Return true if there's more work to be done
     if(changes) return true;
     else return false;