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[NET]: PARISC checksum annotations and cleanups.

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* sanitized prototypes, annotated
* kill shift-by-16 in checksum calculation

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Al Viro
2006-11-14 21:18:39 -08:00
committed by David S. Miller
parent 8e3d8433d8
commit 7814e4b6d6
2 changed files with 36 additions and 36 deletions
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17
arch/parisc/lib/checksum.c
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@@ -101,11 +101,14 @@ out:
/*
* computes a partial checksum, e.g. for TCP/UDP fragments
*/
unsigned int csum_partial(const unsigned char *buff, int len, unsigned int sum)
/*
* why bother folding?
*/
__wsum csum_partial(const void *buff, int len, __wsum sum)
{
unsigned int result = do_csum(buff, len);
addc(result, sum);
return from32to16(result);
return (__force __wsum)from32to16(result);
}
EXPORT_SYMBOL(csum_partial);
@@ -113,8 +116,8 @@ EXPORT_SYMBOL(csum_partial);
/*
* copy while checksumming, otherwise like csum_partial
*/
unsigned int csum_partial_copy_nocheck(const unsigned char *src, unsigned char *dst,
int len, unsigned int sum)
__wsum csum_partial_copy_nocheck(const void *src, void *dst,
int len, __wsum sum)
{
/*
* It's 2:30 am and I don't feel like doing it real ...
@@ -131,9 +134,9 @@ EXPORT_SYMBOL(csum_partial_copy_nocheck);
* Copy from userspace and compute checksum. If we catch an exception
* then zero the rest of the buffer.
*/
unsigned int csum_partial_copy_from_user(const unsigned char __user *src,
unsigned char *dst, int len,
unsigned int sum, int *err_ptr)
__wsum csum_partial_copy_from_user(const void __user *src,
void *dst, int len,
__wsum sum, int *err_ptr)
{
int missing;