--- xnu/xnu-792.6.56/libkern/c++/OSSerialize.cpp
+++ xnu/xnu-124.1/libkern/c++/OSSerialize.cpp
@@ -3,30 +3,23 @@
  *
  * @APPLE_LICENSE_HEADER_START@
  * 
- * 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. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * The contents of this file constitute Original Code as defined in and
+ * are subject to the Apple Public Source License Version 1.1 (the
+ * "License").  You may not use this file except in compliance with the
+ * License.  Please obtain a copy of the License at
+ * http://www.apple.com/publicsource 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
+ * This Original Code and all software distributed under the License are
+ * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
+ * License for the specific language governing rights and limitations
+ * under the License.
  * 
  * @APPLE_LICENSE_HEADER_END@
  */
 /* OSSerialize.cpp created by rsulack on Wen 25-Nov-1998 */
-
-#include <sys/cdefs.h>
-
-__BEGIN_DECLS
-#include <vm/vm_kern.h>
-__END_DECLS
 
 #include <libkern/c++/OSContainers.h>
 #include <libkern/c++/OSLib.h>
@@ -149,14 +142,13 @@
 
     tag = 0;
     length = 1;
-    capacity = (inCapacity) ? round_page_32(inCapacity) : round_page_32(1);
-    capacityIncrement = capacity;
-
-    // allocate from the kernel map so that we can safely map this data
-    // into user space (the primary use of the OSSerialize object)
-    
-    kern_return_t rc = kmem_alloc(kernel_map, (vm_offset_t *)&data, capacity);
-    if (rc) {
+    capacity = inCapacity;
+    capacityIncrement = (capacity)? capacity : 256;
+
+    capacity = (((capacity - 1) / capacityIncrement) + 1)
+             * capacityIncrement;
+    data = (char *) kalloc(capacity);
+    if (!data) {
         tags->release();
         tags = 0;
         return false;
@@ -174,7 +166,7 @@
 	OSSerialize *me = new OSSerialize;
 
 	if (me && !me->initWithCapacity(inCapacity)) {
-		me->release();
+		me->free();
 		return 0;
 	}
 
@@ -193,31 +185,25 @@
 unsigned int OSSerialize::ensureCapacity(unsigned int newCapacity)
 {
 	char *newData;
+	unsigned int oldCapacity;
 
 	if (newCapacity <= capacity)
 		return capacity;
 
 	// round up
-	newCapacity = round_page_32(newCapacity);
-
-	kern_return_t rc = kmem_realloc(kernel_map,
-					(vm_offset_t)data,
-					capacity,
-					(vm_offset_t *)&newData,
-					newCapacity);
-	if (!rc) {
-	    ACCUMSIZE(newCapacity);
-
-	    // kmem realloc does not free the old address range
-	    kmem_free(kernel_map, (vm_offset_t)data, capacity); 
-	    ACCUMSIZE(-capacity);
-	    
-	    // kmem realloc does not zero out the new memory
-	    // and this could end up going to user land
-	    bzero(&newData[capacity], newCapacity - capacity);
-		
-	    data = newData;
-	    capacity = newCapacity;
+	newCapacity = (((newCapacity - 1) / capacityIncrement) + 1)
+                * capacityIncrement;
+	newData = (char *) kalloc(newCapacity);
+	if (newData) {
+		oldCapacity = capacity;
+
+		ACCUMSIZE(newCapacity - oldCapacity);
+
+		bcopy(data, newData, oldCapacity);
+		bzero(&newData[capacity], newCapacity - oldCapacity);
+		kfree((vm_offset_t)data, oldCapacity);
+		data = newData;
+		capacity = newCapacity;
 	}
 
 	return capacity;
@@ -229,7 +215,7 @@
         tags->release();
 
     if (data) {
-	kmem_free(kernel_map, (vm_offset_t)data, capacity); 
+        kfree((vm_offset_t)data, capacity);
         ACCUMSIZE( -capacity );
     }
     super::free();
@@ -239,7 +225,7 @@
 OSDefineMetaClassAndStructors(OSSerializer, OSObject)
 
 OSSerializer * OSSerializer::forTarget( void * target,
-                               OSSerializerCallback callback, void * ref )
+                               OSSerializerCallback callback, void * ref = 0 )
 {
     OSSerializer * thing;