41 static inline unsigned int do_csum(const unsigned char * buff, int len)  in do_csum()  argument
46 	if (len <= 0)  in do_csum()
51 		len--;  in do_csum()
54 	count = len >> 1;		/* nr of 16-bit words.. */  in do_csum()
59 			len -= 2;  in do_csum()
85 		if (len & 2) {  in do_csum()
90 	if (len & 1)  in do_csum()
105 __wsum csum_partial(const void *buff, int len, __wsum sum)  in csum_partial()  argument
107 	unsigned int result = do_csum(buff, len);  in csum_partial()
118 				       int len, __wsum sum)  in csum_partial_copy_nocheck()  argument
124 	sum = csum_partial(src, len, sum);  in csum_partial_copy_nocheck()
125 	memcpy(dst, src, len);  in csum_partial_copy_nocheck()
136 					void *dst, int len,  in csum_partial_copy_from_user()  argument
141 	missing = copy_from_user(dst, src, len);  in csum_partial_copy_from_user()
143 		memset(dst + len - missing, 0, missing);  in csum_partial_copy_from_user()
147 	return csum_partial(dst, len, sum);  in csum_partial_copy_from_user()