+ /* All readers are checked, update least acknowledged token.
+ * There might be multiple writers trying to update this. There is
+ * no need to update this very accurately using compare-and-swap.
+ */
+ if (acked_token != __RTE_QSBR_CNT_MAX)
+ __atomic_store_n(&v->acked_token, acked_token,
+ __ATOMIC_RELAXED);
+