--- libmalloc/libmalloc-140.1.1/src/locking.h
+++ libmalloc/libmalloc-283.40.1/src/locking.h
@@ -24,8 +24,6 @@
 #ifndef __LOCKING_H
 #define __LOCKING_H
 
-#if CONFIG_OS_LOCK_UNFAIR
-
 #if OS_UNFAIR_LOCK_INLINE
 #define os_unfair_lock_lock_with_options(lock, options) \
 		os_unfair_lock_lock_with_options_inline(lock, options)
@@ -33,7 +31,7 @@
 		os_unfair_lock_trylock_inline(lock)
 #define os_unfair_lock_unlock(lock) \
 		os_unfair_lock_unlock_inline(lock)
-#endif
+#endif // OS_UNFAIR_LOCK_INLINE
 
 typedef os_unfair_lock _malloc_lock_s;
 #define _MALLOC_LOCK_INIT OS_UNFAIR_LOCK_INIT
@@ -47,7 +45,7 @@
 MALLOC_ALWAYS_INLINE
 static inline void
 _malloc_lock_lock(_malloc_lock_s *lock) {
-	return os_unfair_lock_lock_with_options(lock,
+	return os_unfair_lock_lock_with_options(lock, OS_UNFAIR_LOCK_ADAPTIVE_SPIN |
 			OS_UNFAIR_LOCK_DATA_SYNCHRONIZATION);
 }
 
@@ -63,51 +61,10 @@
     return os_unfair_lock_unlock(lock);
 }
 
-#else // CONFIG_OS_LOCK_UNFAIR
-#if CONFIG_OS_LOCK_HANDOFF
-
-typedef os_lock_handoff_s _malloc_lock_s;
-#define _MALLOC_LOCK_INIT OS_LOCK_HANDOFF_INIT
-
-__attribute__((always_inline))
+MALLOC_ALWAYS_INLINE
 static inline void
-_malloc_lock_init(_malloc_lock_s *lock) {
-    const os_lock_handoff_s _os_lock_handoff_init = OS_LOCK_HANDOFF_INIT;
-    *lock = _os_lock_handoff_init;
+_malloc_lock_assert_owner(_malloc_lock_s *lock) {
+	os_unfair_lock_assert_owner(lock);
 }
 
-#else //CONFIG_OS_LOCK_HANDOFF
-
-typedef os_lock_spin_s _malloc_lock_s;
-#define _MALLOC_LOCK_INIT OS_LOCK_SPIN_INIT
-
-MALLOC_ALWAYS_INLINE
-static inline void
-_malloc_lock_init(_malloc_lock_s *lock) {
-    const os_lock_spin_s _os_lock_spin_init = OS_LOCK_SPIN_INIT;
-    *lock = _os_lock_spin_init;
-}
-
-#endif
-
-MALLOC_ALWAYS_INLINE
-static inline void
-_malloc_lock_lock(_malloc_lock_s *lock) {
-    return os_lock_lock(lock);
-}
-
-MALLOC_ALWAYS_INLINE
-static inline bool
-_malloc_lock_trylock(_malloc_lock_s *lock) {
-    return os_lock_trylock(lock);
-}
-
-MALLOC_ALWAYS_INLINE
-static inline void
-_malloc_lock_unlock(_malloc_lock_s *lock) {
-    return os_lock_unlock(lock);
-}
-
-#endif // !CONFIG_OS_LOCK_UNFAIR
-
 #endif // __LOCKING_H