17 extern __wsum csum_partial(const void *buff, int len, __wsum sum);
26 extern __wsum csum_partial_copy(const void *src, void *dst, int len, __wsum sum);
35 					int len, __wsum sum, int *csum_err);
38 #define csum_partial_copy_nocheck(src, dst, len, sum)	\  argument
39 	csum_partial_copy((src), (dst), (len), (sum))
56 	u32 sum = (__force u32)csum;  in csum_fold()  local
57 	sum = (sum & 0xffff) + (sum >> 16);  in csum_fold()
58 	sum = (sum & 0xffff) + (sum >> 16);  in csum_fold()
59 	return (__force __sum16)~sum;  in csum_fold()
70 		   __u8 proto, __wsum sum);
76 		  __u8 proto, __wsum sum)  in csum_tcpudp_magic()  argument
78 	return csum_fold(csum_tcpudp_nofold(saddr, daddr, len, proto, sum));  in csum_tcpudp_magic()