How does #define hlist_for_each_entry(tpos, pos, head, member) \ for (pos = (head)->first; \ pos && ({ pos->next ; 1;}) && \ ({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;}); \ pos = pos->next) differ from #define hlist_for_each_entry(tpos, pos, head, member) \ for (pos = (head)->first; \ pos && ({ prefetch(pos->next); 1;}) && \ ({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;}); \ pos = pos->next) More specifically : What is the benefit of using prefetch(x) ? -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ