52 	return (__force __wsum)-1; /* invalid checksum */  in csum_and_copy_to_user()
59 	u32 res = (__force u32)csum;  in csum_add()
60 	res += (__force u32)addend;  in csum_add()
61 	return (__force __wsum)(res + (res < (__force u32)addend));  in csum_add()
72 	u16 res = (__force u16)csum;  in csum16_add()
74 	res += (__force u16)addend;  in csum16_add()
75 	return (__force __sum16)(res + (res < (__force u16)addend));  in csum16_add()
86 	u32 sum = (__force u32)csum2;  in csum_block_add()
92 	return csum_add(csum, (__force __wsum)sum);  in csum_block_add()
109 	return (__force __wsum)n;  in csum_unfold()
117 #define CSUM_MANGLED_0 ((__force __sum16)0xffff)
126 	__wsum tmp = csum_sub(~csum_unfold(*sum), (__force __wsum)from);  in csum_replace4()
128 	*sum = csum_fold(csum_add(tmp, (__force __wsum)to));  in csum_replace4()
155 	inet_proto_csum_replace4(sum, skb, (__force __be32)from,  in inet_proto_csum_replace2()
156 				 (__force __be32)to, pseudohdr);  in inet_proto_csum_replace2()
169 	delta = csum_sub((__force __wsum)csum_fold(csum),  in remcsum_adjust()
170 			 (__force __wsum)*psum);  in remcsum_adjust()
178 	*psum = csum_fold(csum_sub(delta, (__force __wsum)*psum));  in remcsum_unadjust()