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[NET]: H8300 checksum annotations and cleanups.

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* sanitize prototypes and annotate
* collapse csum_partial_copy

NB: csum_partial() is almost certainly still buggy.

Signed-off-by: Al Viro <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Al Viro 2006-11-14 21:16:07 -08:00 • committed by David S. Miller
commit db521083bc
3 changed files with 32 additions and 30 deletions
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31
include/asm-h8300/checksum.h
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@ -13,7 +13,7 @@
*
* 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);
__wsum csum_partial(const void *buff, int len, __wsum sum);
/*
* the same as csum_partial, but copies from src while it
@ -23,7 +23,7 @@ unsigned int csum_partial(const unsigned char * buff, int len, unsigned int sum)
* better 64-bit) boundary
*/
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);
/*
@ -33,20 +33,17 @@ unsigned int csum_partial_copy(const char *src, char *dst, int len, int sum);
* better 64-bit) boundary
*/
extern unsigned int csum_partial_copy_from_user(const char *src, char *dst,
int len, int sum, int *csum_err);
extern __wsum csum_partial_copy_from_user(const void __user *src, void *dst,
int len, __wsum sum, int *csum_err);
#define csum_partial_copy_nocheck(src, dst, len, sum) \
csum_partial_copy((src), (dst), (len), (sum))
unsigned short ip_fast_csum(unsigned char *iph, unsigned int ihl);
__sum16 ip_fast_csum(const void *iph, unsigned int ihl);
/*
* Fold a partial checksum
*/
static inline unsigned int csum_fold(unsigned int sum)
static inline __sum16 csum_fold(__wsum sum)
{
__asm__("mov.l %0,er0\n\t"
"add.w e0,r0\n\t"
@ -58,7 +55,7 @@ static inline unsigned int csum_fold(unsigned int sum)
: "=r"(sum)
: "0"(sum)
: "er0");
return ~sum;
return (__force __sum16)~sum;
}
@ -67,9 +64,9 @@ static inline unsigned int csum_fold(unsigned int sum)
* returns a 16-bit checksum, already complemented
*/
static inline unsigned int
csum_tcpudp_nofold(unsigned long saddr, unsigned long daddr, unsigned short len,
unsigned short proto, unsigned int sum)
static inline __wsum
csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len,
unsigned short proto, __wsum sum)
{
__asm__ ("sub.l er0,er0\n\t"
"add.l %2,%0\n\t"
@ -88,9 +85,9 @@ csum_tcpudp_nofold(unsigned long saddr, unsigned long daddr, unsigned short len,
return sum;
}
static inline unsigned short int
csum_tcpudp_magic(unsigned long saddr, unsigned long daddr, unsigned short len,
unsigned short proto, unsigned int sum)
static inline __sum16
csum_tcpudp_magic(__be32 saddr, __be32 daddr, unsigned short len,
unsigned short proto, __wsum sum)
{
return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum));
}
@ -100,6 +97,6 @@ csum_tcpudp_magic(unsigned long saddr, unsigned long daddr, unsigned short len,
* in icmp.c
*/
extern unsigned short ip_compute_csum(const unsigned char * buff, int len);
extern __sum16 ip_compute_csum(const void *buff, int len);
#endif /* _H8300_CHECKSUM_H */