E1000_FCRTH_RTH  4029 drivers/net/ethernet/intel/e1000e/netdev.c 		fc->high_water = hwm & E1000_FCRTH_RTH;	/* 8-byte granularity */
E1000_FCRTH_RTH  4060 drivers/net/ethernet/intel/e1000e/netdev.c 		fc->high_water = ((pba << 10) * 9 / 10) & E1000_FCRTH_RTH;