14 extern __wsum csum_partial(const void *buff, int len, __wsum sum);
16 					int len, __wsum sum);
18 					  int len, __wsum sum,
21 extern __wsum csum_partial(const void *buff, int len, __wsum sum);
22 extern __sum16 ip_compute_csum(const void *buff, int len);
25 extern __wsum csum_partial_copy(const void *src, void *dst, int len,
42 					unsigned short len,  in csum_tcpudp_nofold()  argument
48 	tmp = (__wsum) ntohs(len) << 16;  in csum_tcpudp_nofold()
69 					unsigned short len,  in csum_tcpudp_magic()  argument
73 	return csum_fold(csum_tcpudp_nofold(saddr, daddr, len, proto, sum));  in csum_tcpudp_magic()
82 extern __wsum csum_and_copy_to_user(const void *src, void *dst, int len,