Em Wed, Nov 19, 2008 at 10:46:24AM -0800, Paul E. McKenney escreveu:
quoted text
> For whatever it is worth, here is a more complete use case, on the
> off-chance that it becomes useful some time:
> 
> 	retry:
> 	rcu_read_lock();

	retry: /* should be here, huh? */

quoted text
> 	hlist_nulls_for_each_entry_rcu(tpos, pos, head, hn_node) {
> 		if (!(curgen = still_valid(tpos)))
> 			goto retry;
> 		if (needs_deletion(tpos)) {
> 			spin_lock(&update_side_lock);
> 			if (still_valid(tpos) == curgen)
> 				hlist_nulls_del_init_rcu(pos);
> 			spin_unlock(&update_side_lock);
> 		}
> 	}
> 	rcu_read_unlock();

- Arnaldo
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