!4764 binder: signal epoll threads of self-work

{

	WARN_ON(!list_empty(&thread->waiting_thread_node));

	binder_enqueue_work_ilocked(work, &thread->todo);

	/* (e)poll-based threads require an explicit wakeup signal when

	 * queuing their own work; they rely on these events to consume

	 * messages without I/O block. Without it, threads risk waiting

	 * indefinitely without handling the work.

	 */

	if (thread->looper & BINDER_LOOPER_STATE_POLL &&

	    thread->pid == current->pid && !thread->process_todo)

		wake_up_interruptible_sync(&thread->wait);

	thread->process_todo = true;

}