diff options
Diffstat (limited to 'arch/c6x/lib/checksum.c')
-rw-r--r-- | arch/c6x/lib/checksum.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/c6x/lib/checksum.c b/arch/c6x/lib/checksum.c new file mode 100644 index 000000000000..67cc93b0b932 --- /dev/null +++ b/arch/c6x/lib/checksum.c | |||
@@ -0,0 +1,36 @@ | |||
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); | ||