apfs/linux-apfs
0
0
Fork 0
mirror of https://github.com/linux-apfs/linux-apfs.git synced 2026-05-01 15:00:59 -07:00
Code Issues Packages Projects Releases Wiki Activity

[NET]: H8300 checksum annotations and cleanups.

Browse Source 
* sanitize prototypes and annotate
* collapse csum_partial_copy

NB: csum_partial() is almost certainly still buggy.

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 21:16:07 -08:00
committed by David S. Miller
parent 8042c44b8a
commit db521083bc
3 changed files with 32 additions and 30 deletions
Download Patch File Download Diff File Expand all files Collapse all files
arch/h8300/lib/checksum.c
+17 -12
View File
@@ -96,9 +96,9 @@ out:
* This is a version of ip_compute_csum() optimized for IP headers,
* which always checksum on 4 octet boundaries.
*/
unsigned short ip_fast_csum(unsigned char * iph, unsigned int ihl)
__sum16 ip_fast_csum(const void *iph, unsigned int ihl)
{
return ~do_csum(iph,ihl*4);
return (__force __sum16)~do_csum(iph,ihl*4);
}
/*
@@ -113,15 +113,19 @@ unsigned short ip_fast_csum(unsigned char * iph, unsigned int ihl)
*
* it's best to have buff aligned on a 32-bit boundary
*/
unsigned int csum_partial(const unsigned char * buff, int len, unsigned int sum)
/*
* Egads... That thing apparently assumes that *all* checksums it ever sees will
* be folded. Very likely a bug.
*/
__wsum csum_partial(const void *buff, int len, __wsum sum)
{
unsigned int result = do_csum(buff, len);
/* add in old sum, and carry.. */
result += sum;
result += (__force u32)sum;
/* 16+c bits -> 16 bits */
result = (result & 0xffff) + (result >> 16);
return result;
return (__force __wsum)result;
}
EXPORT_SYMBOL(csum_partial);
@@ -130,20 +134,21 @@ EXPORT_SYMBOL(csum_partial);
* this routine is used for miscellaneous IP-like checksums, mainly
* in icmp.c
*/
unsigned short ip_compute_csum(const unsigned char * buff, int len)
__sum16 ip_compute_csum(const void *buff, int len)
{
return ~do_csum(buff,len);
return (__force __sum16)~do_csum(buff,len);
}
/*
* copy from fs while checksumming, otherwise like csum_partial
*/
unsigned int
csum_partial_copy_from_user(const char *src, char *dst, int len, int sum, int *csum_err)
__wsum
csum_partial_copy_from_user(const void __user *src, void *dst, int len,
__wsum sum, int *csum_err)
{
if (csum_err) *csum_err = 0;
memcpy(dst, src, len);
memcpy(dst, (__force const void *)src, len);
return csum_partial(dst, len, sum);
}
@@ -151,8 +156,8 @@ csum_partial_copy_from_user(const char *src, char *dst, int len, int sum, int *c
* copy from ds while checksumming, otherwise like csum_partial
*/
unsigned int
csum_partial_copy(const char *src, char *dst, int len, int sum)
__wsum
csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum)
{
memcpy(dst, src, len);
return csum_partial(dst, len, sum);