27 			       int len, __wsum sum, int *err_ptr)  in csum_and_copy_from_user()  argument
35 	if (!len) {  in csum_and_copy_from_user()
40 	if (unlikely((len < 0) || !access_ok(VERIFY_READ, src, len))) {  in csum_and_copy_from_user()
47 					 len, sum, err_ptr, NULL);  in csum_and_copy_from_user()
50 		int missing = __copy_from_user(dst, src, len);  in csum_and_copy_from_user()
53 			memset(dst + len - missing, 0, missing);  in csum_and_copy_from_user()
59 		csum = csum_partial(dst, len, sum);  in csum_and_copy_from_user()
67 __wsum csum_and_copy_to_user(const void *src, void __user *dst, int len,  in csum_and_copy_to_user()  argument
76 	if (!len) {  in csum_and_copy_to_user()
81 	if (unlikely((len < 0) || !access_ok(VERIFY_WRITE, dst, len))) {  in csum_and_copy_to_user()
88 					 len, sum, NULL, err_ptr);  in csum_and_copy_to_user()
91 		csum = csum_partial(src, len, sum);  in csum_and_copy_to_user()
93 		if (copy_to_user(dst, src, len)) {  in csum_and_copy_to_user()