binder: use wake_up_pollfree()

	}

	}

	/*

	/*

	 * If this thread used poll, make sure we remove the waitqueue

	 * If this thread used poll, make sure we remove the waitqueue from any

	 * from any epoll data structures holding it with POLLFREE.

	 * poll data structures holding it.

	 * waitqueue_active() is safe to use here because we're holding

	 * the inner lock.

	 */

	 */

	if ((thread->looper & BINDER_LOOPER_STATE_POLL) &&

	if (thread->looper & BINDER_LOOPER_STATE_POLL)

	    waitqueue_active(&thread->wait)) {

		wake_up_pollfree(&thread->wait);

		wake_up_poll(&thread->wait, POLLHUP | POLLFREE);

	}

	binder_inner_proc_unlock(thread->proc);

	binder_inner_proc_unlock(thread->proc);

	/*

	/*

	 * This is needed to avoid races between wake_up_poll() above and

	 * This is needed to avoid races between wake_up_pollfree() above and

	 * and ep_remove_waitqueue() called for other reasons (eg the epoll file

	 * someone else removing the last entry from the queue for other reasons

	 * descriptor being closed); ep_remove_waitqueue() holds an RCU read

	 * (e.g. ep_remove_wait_queue() being called due to an epoll file

	 * lock, so we can be sure it's done after calling synchronize_rcu().

	 * descriptor being closed).  Such other users hold an RCU read lock, so

	 * we can be sure they're done after we call synchronize_rcu().

	 */

	 */

	if (thread->looper & BINDER_LOOPER_STATE_POLL)

	if (thread->looper & BINDER_LOOPER_STATE_POLL)

		synchronize_rcu();

		synchronize_rcu();