| /* |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| */ |
| #include <linux/module.h> |
| #include <net/checksum.h> |
| |
| #include <asm/byteorder.h> |
| |
| /* |
| * copy from fs while checksumming, otherwise like csum_partial |
| */ |
| __wsum |
| csum_partial_copy_from_user(const void __user *src, void *dst, int len, |
| __wsum sum, int *csum_err) |
| { |
| int missing; |
| |
| missing = __copy_from_user(dst, src, len); |
| if (missing) { |
| memset(dst + len - missing, 0, missing); |
| *csum_err = -EFAULT; |
| } else |
| *csum_err = 0; |
| |
| return csum_partial(dst, len, sum); |
| } |
| EXPORT_SYMBOL(csum_partial_copy_from_user); |
| |
| /* These are from csum_64plus.S */ |
| EXPORT_SYMBOL(csum_partial); |
| EXPORT_SYMBOL(csum_partial_copy); |
| EXPORT_SYMBOL(ip_compute_csum); |
| EXPORT_SYMBOL(ip_fast_csum); |