* Reverted r33643 - while it doubled the performance for my test case (with

high contention of the read lock (I experimented with the VM page mapping
  lock)), it actually hurt the compile performance pretty obviously.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33647 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/lock.h

@@ -42,7 +42,6 @@ struct rw_lock_waiter;
 
 typedef struct rw_lock {
 	const char*				name;
-	mutex					lock;
 	struct rw_lock_waiter*	waiters;
 	thread_id				holder;
 	int32					reader_count;
@@ -86,8 +85,7 @@ typedef struct rw_lock {
 #	define RECURSIVE_LOCK_INITIALIZER(name)	{ MUTEX_INITIALIZER(name), -1, 0 }
 #endif
 
-#define RW_LOCK_INITIALIZER(name)			{ name, MUTEX_INITIALIZER(name), \
-												NULL, -1, 0, 0, 0 }
+#define RW_LOCK_INITIALIZER(name)			{ name, NULL, -1, 0, 0, 0 }
 
 
 #if KDEBUG