56 	return (__force __wsum)-1; /* invalid checksum */  in csum_and_copy_to_user()
63 	u32 res = (__force u32)csum;  in csum_add()
64 	res += (__force u32)addend;  in csum_add()
65 	return (__force __wsum)(res + (res < (__force u32)addend));  in csum_add()
76 	u16 res = (__force u16)csum;  in csum16_add()
78 	res += (__force u16)addend;  in csum16_add()
79 	return (__force __sum16)(res + (res < (__force u16)addend));  in csum16_add()
90 	u32 sum = (__force u32)csum2;  in csum_block_add()
93 	return csum_add(csum, (__force __wsum)sum);  in csum_block_add()
105 	u32 sum = (__force u32)csum2;  in csum_block_sub()
108 	return csum_sub(csum, (__force __wsum)sum);  in csum_block_sub()
113 	return (__force __wsum)n;  in csum_unfold()
121 #define CSUM_MANGLED_0 ((__force __sum16)0xffff)
125 	__wsum tmp = csum_sub(~csum_unfold(*sum), (__force __wsum)from);  in csum_replace4()
127 	*sum = csum_fold(csum_add(tmp, (__force __wsum)to));  in csum_replace4()
154 	inet_proto_csum_replace4(sum, skb, (__force __be32)from,  in inet_proto_csum_replace2()
155 				 (__force __be32)to, pseudohdr);  in inet_proto_csum_replace2()