From: Jarek Poplawski <jarkao2@xxxxxxxxx> Date: Sat, 26 Jul 2008 15:18:38 +0200 > I guess some additional synchronization will be added yet to prevent > parallel freeze and especially unfreeze. Yes, that could be a problem. Using test_and_set_bit() can guard the freezing sequence itself, but it won't handle letting two threads of control freeze and unfreeze safely without a reference count. We want this thing to be able to be used flexbly, which means we can't just assume that this is a short code sequence and the unfreeze will come quickly. That pretty much rules out using a new lock around the operation or anything like that. So I guess we could replace the state bit with a reference count. It doesn't even need to be atomic since it is set and tested under dev_queue->_xmit_lock -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
