Add the rt linux 4.1.3-rt3 as base
[kvmfornfv.git] / kernel / arch / c6x / lib / checksum.c
1 /*
2  *              This program is free software; you can redistribute it and/or
3  *              modify it under the terms of the GNU General Public License
4  *              as published by the Free Software Foundation; either version
5  *              2 of the License, or (at your option) any later version.
6  */
7 #include <linux/module.h>
8 #include <net/checksum.h>
9
10 #include <asm/byteorder.h>
11
12 /*
13  * copy from fs while checksumming, otherwise like csum_partial
14  */
15 __wsum
16 csum_partial_copy_from_user(const void __user *src, void *dst, int len,
17                             __wsum sum, int *csum_err)
18 {
19         int missing;
20
21         missing = __copy_from_user(dst, src, len);
22         if (missing) {
23                 memset(dst + len - missing, 0, missing);
24                 *csum_err = -EFAULT;
25         } else
26                 *csum_err = 0;
27
28         return csum_partial(dst, len, sum);
29 }
30 EXPORT_SYMBOL(csum_partial_copy_from_user);
31
32 /* These are from csum_64plus.S */
33 EXPORT_SYMBOL(csum_partial);
34 EXPORT_SYMBOL(csum_partial_copy);
35 EXPORT_SYMBOL(ip_compute_csum);
36 EXPORT_SYMBOL(ip_fast_csum);