37 static inline unsigned int do_csum(const unsigned char * buff, int len)  in do_csum()  argument
44 	odd = 1 & (unsigned long) buff;  in do_csum()
46 		result = be16_to_cpu(*buff);  in do_csum()
48 		buff++;  in do_csum()
52 		if (2 & (unsigned long) buff) {  in do_csum()
53 			result += *(unsigned short *) buff;  in do_csum()
56 			buff += 2;  in do_csum()
62 				r1 = *(unsigned int *)(buff + 0);  in do_csum()
63 				r2 = *(unsigned int *)(buff + 4);  in do_csum()
64 				r3 = *(unsigned int *)(buff + 8);  in do_csum()
65 				r4 = *(unsigned int *)(buff + 12);  in do_csum()
71 				buff += 16;  in do_csum()
74 				unsigned int w = *(unsigned int *) buff;  in do_csum()
76 				buff += 4;  in do_csum()
82 			result += *(unsigned short *) buff;  in do_csum()
83 			buff += 2;  in do_csum()
87 		result += le16_to_cpu(*buff);  in do_csum()
101 __wsum csum_partial(const void *buff, int len, __wsum sum)  in csum_partial()  argument
103 	unsigned int result = do_csum(buff, len);  in csum_partial()