-/* Flow Control High-Watermark: 5688 bytes below Rx FIFO size */
-#define E1000_FC_HIGH_DIFF 0x1638
-
-/* Flow Control Low-Watermark: 5696 bytes below Rx FIFO size */
-#define E1000_FC_LOW_DIFF 0x1640
+/* Flow Control Watermarks */
+#define E1000_FC_HIGH_DIFF 0x1638 /* High: 5688 bytes below Rx FIFO size */
+#define E1000_FC_LOW_DIFF 0x1640 /* Low: 5696 bytes below Rx FIFO size */