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authorAl Viro <viro@zeniv.linux.org.uk>2006-11-14 21:16:30 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2006-12-02 21:23:05 -0800
commit322529961e3b3e64fdf1a3e46a45294456c91acf (patch)
tree94f029cb2fce7d2672e1bba0e80a47a0bb170d0c /arch/ia64/lib/csum_partial_copy.c
parentdb521083bcb75505e9c3e21cbabe8274ee0daea6 (diff)
downloadblackbird-op-linux-322529961e3b3e64fdf1a3e46a45294456c91acf.tar.gz
blackbird-op-linux-322529961e3b3e64fdf1a3e46a45294456c91acf.zip
[NET]: IA64 checksum annotations and cleanups.
* sanitize prototypes, annotate * ntohs -> shift in checksum calculations * kill access_ok() in csum_partial_copy_from_user * collapse do_csum_partial_copy_from_user Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/ia64/lib/csum_partial_copy.c')
-rw-r--r--arch/ia64/lib/csum_partial_copy.c31
1 files changed, 9 insertions, 22 deletions
diff --git a/arch/ia64/lib/csum_partial_copy.c b/arch/ia64/lib/csum_partial_copy.c
index 36866e8a5d2b..503dfe6d1450 100644
--- a/arch/ia64/lib/csum_partial_copy.c
+++ b/arch/ia64/lib/csum_partial_copy.c
@@ -104,9 +104,9 @@ out:
*/
extern unsigned long do_csum(const unsigned char *, long);
-static unsigned int
-do_csum_partial_copy_from_user (const unsigned char __user *src, unsigned char *dst,
- int len, unsigned int psum, int *errp)
+__wsum
+csum_partial_copy_from_user(const void __user *src, void *dst,
+ int len, __wsum psum, int *errp)
{
unsigned long result;
@@ -122,30 +122,17 @@ do_csum_partial_copy_from_user (const unsigned char __user *src, unsigned char *
result = do_csum(dst, len);
/* add in old sum, and carry.. */
- result += psum;
+ result += (__force u32)psum;
/* 32+c bits -> 32 bits */
result = (result & 0xffffffff) + (result >> 32);
- return result;
-}
-
-unsigned int
-csum_partial_copy_from_user (const unsigned char __user *src, unsigned char *dst,
- int len, unsigned int sum, int *errp)
-{
- if (!access_ok(VERIFY_READ, src, len)) {
- *errp = -EFAULT;
- memset(dst, 0, len);
- return sum;
- }
-
- return do_csum_partial_copy_from_user(src, dst, len, sum, errp);
+ return (__force __wsum)result;
}
-unsigned int
-csum_partial_copy_nocheck(const unsigned char __user *src, unsigned char *dst,
- int len, unsigned int sum)
+__wsum
+csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum)
{
- return do_csum_partial_copy_from_user(src, dst, len, sum, NULL);
+ return csum_partial_copy_from_user((__force const void __user *)src,
+ dst, len, sum, NULL);
}
EXPORT_SYMBOL(csum_partial_copy_nocheck);
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