NETIF_F_GSO_GRE_CSUM  180 include/linux/netdev_features.h 				 NETIF_F_GSO_GRE_CSUM |			\
NETIF_F_GSO_GRE_CSUM 3571 include/linux/netdevice.h 	BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT));