--- xnu/xnu-3248.50.21/iokit/Kernel/IOLocks.cpp
+++ xnu/xnu-1228.5.18/iokit/Kernel/IOLocks.cpp
@@ -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>
 
@@ -37,11 +46,6 @@
 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 +69,13 @@
 
 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));
 }
 
@@ -79,42 +83,6 @@
 {   
 	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 {
@@ -227,10 +195,11 @@
     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 +210,6 @@
     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);