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authorAl Viro <viro@zeniv.linux.org.uk>2006-11-15 08:14:53 +0300
committerDavid S. Miller <davem@sunset.davemloft.net>2006-12-03 08:23:01 +0300
commit9be259aae5264511fe0a8b5e3d6711e0fd1d55df (patch)
treed424fd156edc0568a1d47b9322b1159202be109b /arch/alpha/lib/csum_partial_copy.c
parent2bc357987a6510e61d33f3b20fa989fb2b6a10b8 (diff)
downloadlinux-9be259aae5264511fe0a8b5e3d6711e0fd1d55df.tar.xz
[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>
Diffstat (limited to 'arch/alpha/lib/csum_partial_copy.c')
-rw-r--r--arch/alpha/lib/csum_partial_copy.c31
1 files changed, 9 insertions, 22 deletions
diff --git a/arch/alpha/lib/csum_partial_copy.c b/arch/alpha/lib/csum_partial_copy.c
index a37948f3037a..4ca75c74ce90 100644
--- a/arch/alpha/lib/csum_partial_copy.c
+++ b/arch/alpha/lib/csum_partial_copy.c
@@ -329,11 +329,11 @@ csum_partial_cfu_unaligned(const unsigned long __user * src,
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 @@ do_csum_partial_copy_from_user(const char __user *src, char *dst, int len,
}
checksum = from64to16 (checksum);
}
- return checksum;
-}
-
-unsigned int
-csum_partial_copy_from_user(const char __user *src, 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)checksum;
}
-unsigned int
-csum_partial_copy_nocheck(const char __user *src, 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);
}