#define PKT_TX_IEEE1588_TMST (1ULL << 51) /**< TX IEEE1588 packet to timestamp. */
/* Use final bit of flags to indicate a control mbuf */
-#define CTRL_MBUF_FLAG (1ULL << 63)
+#define CTRL_MBUF_FLAG (1ULL << 63) /**< Mbuf contains control data */
/**
* Bit Mask to indicate what bits required for building TX context