David Xu 1b008f5e51 Some software think a mutex can be destroyed after it owned it, for
example, it uses a serialization point like following:
	pthread_mutex_lock(&mutex);
	pthread_mutex_unlock(&mutex);
	pthread_mutex_destroy(&muetx);
They think a previous lock holder should have already left the mutex and
is no longer referencing it, so they destroy it. To be maximum compatible
with such code, we use IA64 version to unlock the mutex in kernel, remove
the two steps unlocking code.
2012-03-18 00:22:29 +00:00
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