[NET]: Alpha checksum annotations and cleanups.
* sanitize prototypes and annotate
* kill useless access_ok() in csum_partial_copy_from_user() (the only
caller checks it already).
* do_csum_partial_copy_from_user() is not needed now
* replace htons(len) with len << 8 - they are the same wrt checksums
on little-endian.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/alpha/lib/csum_partial_copy.c b/arch/alpha/lib/csum_partial_copy.c
index a37948f..4ca75c7 100644
--- a/arch/alpha/lib/csum_partial_copy.c
+++ b/arch/alpha/lib/csum_partial_copy.c
@@ -329,11 +329,11 @@
return checksum;
}
-static unsigned int
-do_csum_partial_copy_from_user(const char __user *src, char *dst, int len,
- unsigned int sum, int *errp)
+__wsum
+csum_partial_copy_from_user(const void __user *src, void *dst, int len,
+ __wsum sum, int *errp)
{
- unsigned long checksum = (unsigned) sum;
+ unsigned long checksum = (__force u32) sum;
unsigned long soff = 7 & (unsigned long) src;
unsigned long doff = 7 & (unsigned long) dst;
@@ -367,25 +367,12 @@
}
checksum = from64to16 (checksum);
}
- return checksum;
+ return (__force __wsum)checksum;
}
-unsigned int
-csum_partial_copy_from_user(const char __user *src, char *dst, int len,
- unsigned int sum, int *errp)
+__wsum
+csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum)
{
- 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);
-}
-
-unsigned int
-csum_partial_copy_nocheck(const char __user *src, char *dst, int len,
- unsigned int 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);
}