--- xnu/xnu-3248.50.21/iokit/Kernel/IOLocks.cpp
+++ xnu/xnu-792.22.5/iokit/Kernel/IOLocks.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998-2007 Apple Inc. All rights reserved.
+ * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
@@ -25,6 +25,15 @@
  * 
  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
+/*
+ * Copyright (c) 1998 Apple Computer, Inc.  All rights reserved. 
+ *
+ * HISTORY
+ *
+ */
+
+
+#define	IOLOCKS_CPP	1
 
 #include <IOKit/system.h>
 
@@ -32,16 +41,9 @@
 #include <IOKit/IOLib.h> 
 #include <IOKit/assert.h>
 
-#include <IOKit/IOLocksPrivate.h>
-
 extern "C" {
 #include <kern/locks.h>
 
-#if defined(__x86_64__)
-/* Synthetic event if none is specified, for backwards compatibility only. */
-static bool IOLockSleep_NO_EVENT __attribute__((used)) = 0;
-#endif
-
 void	IOLockInitWithState( IOLock * lock, IOLockState state)
 {
     if( state == kIOLockStateLocked)
@@ -65,13 +67,13 @@
 
 int	IOLockSleep( IOLock * lock, void *event, UInt32 interType)
 {
-    return (int) lck_mtx_sleep(lock, LCK_SLEEP_PROMOTED_PRI, (event_t) event, (wait_interrupt_t) interType);
+    return (int) lck_mtx_sleep(lock, LCK_SLEEP_DEFAULT, (event_t) event, (wait_interrupt_t) interType);
 }
 
 int	IOLockSleepDeadline( IOLock * lock, void *event,
                                 AbsoluteTime deadline, UInt32 interType)
 {
-    return (int) lck_mtx_sleep_deadline(lock, LCK_SLEEP_PROMOTED_PRI, (event_t) event,
+    return (int) lck_mtx_sleep_deadline(lock, LCK_SLEEP_DEFAULT, (event_t) event,
     					(wait_interrupt_t) interType, __OSAbsoluteTime(deadline));
 }
 
@@ -80,91 +82,44 @@
 	thread_wakeup_prim((event_t) event, oneThread, THREAD_AWAKENED);
 }   
 
-#if defined(__x86_64__)
-/*
- * For backwards compatibility, kexts built against pre-Darwin 14 headers will bind at runtime to this function,
- * which supports a NULL event,
- */
-int	IOLockSleep_legacy_x86_64( IOLock * lock, void *event, UInt32 interType) __asm("_IOLockSleep");
-int	IOLockSleepDeadline_legacy_x86_64( IOLock * lock, void *event,
-					   AbsoluteTime deadline, UInt32 interType) __asm("_IOLockSleepDeadline");
-void	IOLockWakeup_legacy_x86_64(IOLock * lock, void *event, bool oneThread) __asm("_IOLockWakeup");
-
-int	IOLockSleep_legacy_x86_64( IOLock * lock, void *event, UInt32 interType)
-{
-    if (event == NULL)
-        event = (void *)&IOLockSleep_NO_EVENT;
-
-    return IOLockSleep(lock, event, interType);
-}
-
-int	IOLockSleepDeadline_legacy_x86_64( IOLock * lock, void *event,
-			     AbsoluteTime deadline, UInt32 interType)
-{
-    if (event == NULL)
-        event = (void *)&IOLockSleep_NO_EVENT;
-
-    return IOLockSleepDeadline(lock, event, deadline, interType);
-}
-
-void	IOLockWakeup_legacy_x86_64(IOLock * lock, void *event, bool oneThread)
-{   
-    if (event == NULL)
-        event = (void *)&IOLockSleep_NO_EVENT;
-
-    IOLockWakeup(lock, event, oneThread);
-}   
-#endif /* defined(__x86_64__) */
-
 
 struct _IORecursiveLock {
-	lck_mtx_t	*mutex;
-	lck_grp_t	*group;
-	thread_t	thread;
-	UInt32		count;
+    lck_mtx_t   *mutex;
+    thread_t	thread;
+    UInt32	count;
 };
 
-IORecursiveLock * IORecursiveLockAllocWithLockGroup( lck_grp_t * lockGroup )
+IORecursiveLock * IORecursiveLockAlloc( void )
 {
     _IORecursiveLock * lock;
 
-    if( lockGroup == 0 )
+    lock = IONew( _IORecursiveLock, 1);
+    if( !lock)
         return( 0 );
 
-    lock = IONew( _IORecursiveLock, 1 );
-    if( !lock )
-        return( 0 );
-
-    lock->mutex = lck_mtx_alloc_init( lockGroup, LCK_ATTR_NULL );
-    if( lock->mutex ) {
-		lock->group = lockGroup;
+    lock->mutex = lck_mtx_alloc_init(IOLockGroup, LCK_ATTR_NULL);
+    if( lock->mutex) {
         lock->thread = 0;
         lock->count  = 0;
     } else {
-        IODelete( lock, _IORecursiveLock, 1 );
+        IODelete( lock, _IORecursiveLock, 1);
         lock = 0;
     }
 
     return( (IORecursiveLock *) lock );
 }
 
-
-IORecursiveLock * IORecursiveLockAlloc( void )
-{
-    return IORecursiveLockAllocWithLockGroup( IOLockGroup );
-}
-
 void IORecursiveLockFree( IORecursiveLock * _lock )
 {
     _IORecursiveLock * lock = (_IORecursiveLock *)_lock;
-	
-    lck_mtx_free( lock->mutex, lock->group );
-    IODelete( lock, _IORecursiveLock, 1 );
-}
-
-lck_mtx_t * IORecursiveLockGetMachLock( IORecursiveLock * lock )
-{
-    return( lock->mutex );
+
+    lck_mtx_free( lock->mutex , IOLockGroup);
+    IODelete( lock, _IORecursiveLock, 1);
+}
+
+lck_mtx_t * IORecursiveLockGetMachLock( IORecursiveLock * lock)
+{
+    return( lock->mutex);
 }
 
 void IORecursiveLockLock( IORecursiveLock * _lock)
@@ -227,10 +182,11 @@
     int res;
 
     assert(lock->thread == IOThreadSelf());
+    assert(lock->count == 1 || interType == THREAD_UNINT);
     
     lock->count = 0;
     lock->thread = 0;
-    res = lck_mtx_sleep(lock->mutex, LCK_SLEEP_PROMOTED_PRI, (event_t) event, (wait_interrupt_t) interType);
+    res = lck_mtx_sleep(lock->mutex, LCK_SLEEP_DEFAULT, (event_t) event, (wait_interrupt_t) interType);
 
     // Must re-establish the recursive lock no matter why we woke up
     // otherwise we would potentially leave the return path corrupted.
@@ -241,29 +197,6 @@
     return res;
 }
 
-int	IORecursiveLockSleepDeadline( IORecursiveLock * _lock, void *event,
-                                  AbsoluteTime deadline, UInt32 interType)
-{
-    _IORecursiveLock * lock = (_IORecursiveLock *)_lock;
-    UInt32 count = lock->count;
-    int res;
-
-    assert(lock->thread == IOThreadSelf());
-    
-    lock->count = 0;
-    lock->thread = 0;
-    res = lck_mtx_sleep_deadline(lock->mutex, LCK_SLEEP_PROMOTED_PRI, (event_t) event, 
-								      (wait_interrupt_t) interType, __OSAbsoluteTime(deadline));
-
-    // Must re-establish the recursive lock no matter why we woke up
-    // otherwise we would potentially leave the return path corrupted.
-    assert(lock->thread == 0);
-    assert(lock->count == 0);
-    lock->thread = IOThreadSelf();
-    lock->count = count;
-    return res;
-}
-
 void IORecursiveLockWakeup(IORecursiveLock *, void *event, bool oneThread)
 {
     thread_wakeup_prim((event_t) event, oneThread, THREAD_AWAKENED);