27 __wsum csum_partial(const void *buff, int len, __wsum sum);
38 csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum);
41 csum_partial_copy_from_user(const void __user *src, void *dst, int len, __wsum sum, int *err_ptr);
46 static inline __sum16 csum_fold(__wsum sum)  in csum_fold()  argument
50 	: "=r" (sum)  in csum_fold()
51 	: "r" (sum)  in csum_fold()
53 	return (__force __sum16)(~(__force u32)sum >> 16);  in csum_fold()
64 	__wsum sum;  in ip_fast_csum()  local
81 	: "=r" (sum), "=r" (iph), "=r" (ihl), "=r" (tmp1)  in ip_fast_csum()
84 	return csum_fold(sum);  in ip_fast_csum()
89 		   __u8 proto, __wsum sum)  in csum_tcpudp_nofold()  argument
92 	if (__builtin_constant_p(sum) && sum == 0) {  in csum_tcpudp_nofold()
101 		: "=&r" (sum)  in csum_tcpudp_nofold()
114 		: "=&r"(sum)  in csum_tcpudp_nofold()
115 		: "r" (sum), "r" (daddr), "r" (saddr), "r" (lenprot)  in csum_tcpudp_nofold()
118 	return sum;  in csum_tcpudp_nofold()
126 		  __u8 proto, __wsum sum)  in csum_tcpudp_magic()  argument
128 	return csum_fold(csum_tcpudp_nofold(saddr, daddr, len, proto, sum));  in csum_tcpudp_magic()
145 		__be32 proto, __wsum sum);
149 		__u32 len, __u8 proto, __wsum sum)  in csum_ipv6_magic()  argument
152 					   htonl(proto), sum));  in csum_ipv6_magic()