return 0;
*new_head = *old_head + n;
- if (is_sc)
- r->cons.head = *new_head, success = 1;
- else
+ if (is_sc) {
+ r->cons.head = *new_head;
+ rte_smp_rmb();
+ success = 1;
+ } else {
success = rte_atomic32_cmpset(&r->cons.head, *old_head,
*new_head);
+ }
} while (unlikely(success == 0));
return n;
}