Is is intentional that tummy_task is not initialized?
Ok, it won't crash because the current __run_task_queue() implementation
doesn't call tq->routine if it's NULL, but IMHO it's ugly.

Additionally I don't like the loop in flush_scheduled_tasks(), what
about replacing it with a locked semaphore (same idea as vfork)?

I've attched an untested patch.

--
	Manfred