CHECKSUM_PARTIAL 2194 include/linux/netdevice.h return (skb->ip_summed != CHECKSUM_PARTIAL && CHECKSUM_PARTIAL 3591 include/linux/netdevice.h unlikely((skb->ip_summed != CHECKSUM_PARTIAL) && CHECKSUM_PARTIAL 73 include/net/ip6_checksum.h if (skb->ip_summed == CHECKSUM_PARTIAL) {