extern void skb_free_datagram(struct sock *sk, struct sk_buff *skb);
extern void skb_kill_datagram(struct sock *sk, struct sk_buff *skb,
unsigned int flags);
-extern unsigned int skb_checksum(const struct sk_buff *skb, int offset,
- int len, unsigned int csum);
+extern __wsum skb_checksum(const struct sk_buff *skb, int offset,
+ int len, __wsum csum);
extern int skb_copy_bits(const struct sk_buff *skb, int offset,
void *to, int len);
extern int skb_store_bits(const struct sk_buff *skb, int offset,