suse man page for skb_postpull_rcsum

SKB_POSTPULL_RCSUM(9)						 Linux Networking					     SKB_POSTPULL_RCSUM(9)

NAME
       skb_postpull_rcsum - update checksum for received skb after pull

SYNOPSIS
       void skb_postpull_rcsum(struct sk_buff * skb, const void * start, unsigned int len);

ARGUMENTS
       skb
	   buffer to update

       start
	   start of data before pull

       len
	   length of data pulled

DESCRIPTION
       After doing a pull on a received packet, you need to call this to update the CHECKSUM_COMPLETE checksum, or set ip_summed to CHECKSUM_NONE
       so that it can be recomputed from scratch.

COPYRIGHT
Kernel Hackers Manual 2.6.					     July 2010						     SKB_POSTPULL_RCSUM(9)