* @param kvlist
* The rte_kvargs structure
* @param key_match
- * The key on which the handler should be called
+ * The key on which the handler should be called, or NULL to process handler
+ * on all associations
* @param handler
* The function to call for each matching key
* @param opaque_arg
* @param kvlist
* The rte_kvargs structure
* @param key_match
- * The key that should match
+ * The key that should match, or NULL to count all associations
* @return
* The number of entries