RxChkSum          248 drivers/net/ethernet/realtek/8139cp.c 	RxChkSum	= (1 << 5),  /* Rx checksum offload enable */
RxChkSum          501 drivers/net/ethernet/realtek/r8169_main.c 	RxChkSum	= (1 << 5),
RxChkSum          505 drivers/net/ethernet/realtek/r8169_main.c #define CPCMD_MASK	(Normal_mode | RxVlan | RxChkSum | INTT_MASK)