--- xnu/xnu-792.21.3/iokit/Kernel/IOWorkLoop.cpp
+++ xnu/xnu-517/iokit/Kernel/IOWorkLoop.cpp
@@ -1,19 +1,16 @@
 /*
  * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
  *
- * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ * @APPLE_LICENSE_HEADER_START@
+ * 
+ * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
  * 
  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. The rights granted to you under the License
- * may not be used to create, or enable the creation or redistribution of,
- * unlawful or unlicensed copies of an Apple operating system, or to
- * circumvent, violate, or enable the circumvention or violation of, any
- * terms of an Apple operating system software license agreement.
- * 
- * Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
  * 
  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
@@ -23,7 +20,7 @@
  * Please see the License for the specific language governing rights and
  * limitations under the License.
  * 
- * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ * @APPLE_LICENSE_HEADER_END@
  */
 /*
 Copyright (c) 1998 Apple Computer, Inc.  All rights reserved.
@@ -63,6 +60,12 @@
 
 #define fFlags loopRestart
 
+void IOWorkLoop::launchThreadMain(void *self)
+{
+    thread_set_cont_arg((int) self);
+    threadMainContinuation();
+}
+
 bool IOWorkLoop::init()
 {
     // The super init and gateLock allocation MUST be done first
@@ -90,7 +93,7 @@
     if (addEventSource(controlG) != kIOReturnSuccess)
         return false;
 
-    workThread = IOCreateThread((thread_continue_t)threadMainContinuation, this);
+    workThread = IOCreateThread(launchThreadMain, (void *) this);
     if (!workThread)
         return false;
 
@@ -246,9 +249,12 @@
 
 #endif /* KDEBUG */
 
-void IOWorkLoop::threadMainContinuation(IOWorkLoop *self)
-{
-	self->threadMain();
+void IOWorkLoop::threadMainContinuation()
+{
+  IOWorkLoop* self;
+  self = (IOWorkLoop *) thread_get_cont_arg();
+
+  self->threadMain();
 }
 
 void IOWorkLoop::threadMain()
@@ -291,7 +297,8 @@
 	    assert_wait((void *) &workToDo, false);
 	    IOSimpleLockUnlockEnableInterrupt(workToDoLock, is);
 
-	    thread_block_parameter((thread_continue_t)threadMainContinuation, this);
+	    thread_set_cont_arg((int) this);
+	    thread_block(&threadMainContinuation);
 	    /* NOTREACHED */
 	}