--- xnu/xnu-344.49/libsa/bootstrap.cpp
+++ xnu/xnu-124.7/libsa/bootstrap.cpp
@@ -3,22 +3,19 @@
  *
  * @APPLE_LICENSE_HEADER_START@
  * 
- * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
+ * 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.
  * 
- * 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 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@
  */
@@ -31,8 +28,6 @@
 extern "C" {
 #include <libsa/malloc.h>
 };
-
-#include "kld_patch.h"
 
 extern "C" {
 /*****
@@ -54,6 +49,8 @@
  * about loading and matching drivers.
  */
 extern int kernelLinkerPresent;
+
+extern IOLock * kld_lock;
 };
 
 
@@ -72,6 +69,9 @@
  */
 KLDBootstrap::KLDBootstrap() {
 
+    kld_lock = IOLockAlloc();
+    IOLockLock(kld_lock);
+
     kmod_load_function = &load_kernel_extension;
 
     record_startup_extensions_function = &recordStartupExtensions;
@@ -79,6 +79,8 @@
     remove_startup_extension_function = &removeStartupExtension;
 
     kernelLinkerPresent = 1;
+
+    IOLockUnlock(kld_lock);
 }
 
 /* The destructor frees all wired memory regions held
@@ -86,15 +88,16 @@
  */
 KLDBootstrap::~KLDBootstrap() {
 
-    kld_file_cleanup_all_resources();
+    OSDictionary * startupExtensions;
 
-   /* Dump all device-tree entries for boot drivers, and all
-    * info on startup extensions. The IOCatalogue will now
-    * get personalities from kextd.
-    */
-    clearStartupExtensionsAndLoaderInfo();
+    IOLockLock(kld_lock);
 
-   /* Free all temporary malloc memory.
-    */
     malloc_reset();
+
+    startupExtensions = getStartupExtensions();
+    if (startupExtensions) startupExtensions->release();
+
+    IOLockUnlock(kld_lock);
+    IOLockFree(kld_lock);
+
 }