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[NET]: SPARC64 checksum annotations and cleanups.

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* sanitize prototypes, annotate
* kill useless shift

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 21:23:20 -08:00 committed by David S. Miller
parent 16ec7e168d
commit d5c6393641
1 changed files with 33 additions and 38 deletions
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71
include/asm-sparc64/checksum.h
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@ -30,7 +30,7 @@
*
* it's best to have buff aligned on a 32-bit boundary
*/
extern unsigned int csum_partial(const unsigned char * buff, int len, unsigned int sum);
extern __wsum csum_partial(const void * buff, int len, __wsum sum);
/* the same as csum_partial, but copies from user space while it
* checksums
@ -38,52 +38,50 @@ extern unsigned int csum_partial(const unsigned char * buff, int len, unsigned i
* here even more important to align src and dst on a 32-bit (or even
* better 64-bit) boundary
*/
extern unsigned int csum_partial_copy_nocheck(const unsigned char *src,
unsigned char *dst,
int len, unsigned int sum);
extern __wsum csum_partial_copy_nocheck(const void *src, void *dst,
int len, __wsum sum);
extern long __csum_partial_copy_from_user(const unsigned char __user *src,
unsigned char *dst, int len,
unsigned int sum);
extern long __csum_partial_copy_from_user(const void __user *src,
void *dst, int len,
__wsum sum);
static inline unsigned int
csum_partial_copy_from_user(const unsigned char __user *src,
unsigned char *dst, int len,
unsigned int sum, int *err)
static inline __wsum
csum_partial_copy_from_user(const void __user *src,
void *dst, int len,
__wsum sum, int *err)
{
long ret = __csum_partial_copy_from_user(src, dst, len, sum);
if (ret < 0)
*err = -EFAULT;
return (unsigned int) ret;
return (__force __wsum) ret;
}
/*
* Copy and checksum to user
*/
#define HAVE_CSUM_COPY_USER
extern long __csum_partial_copy_to_user(const unsigned char *src,
unsigned char __user *dst, int len,
unsigned int sum);
extern long __csum_partial_copy_to_user(const void *src,
void __user *dst, int len,
__wsum sum);
static inline unsigned int
csum_and_copy_to_user(const unsigned char *src,
unsigned char __user *dst, int len,
unsigned int sum, int *err)
static inline __wsum
csum_and_copy_to_user(const void *src,
void __user *dst, int len,
__wsum sum, int *err)
{
long ret = __csum_partial_copy_to_user(src, dst, len, sum);
if (ret < 0)
*err = -EFAULT;
return (unsigned int) ret;
return (__force __wsum) ret;
}
/* ihl is always 5 or greater, almost always is 5, and iph is word aligned
* the majority of the time.
*/
extern unsigned short ip_fast_csum(__const__ unsigned char *iph,
unsigned int ihl);
extern __sum16 ip_fast_csum(const void *iph, unsigned int ihl);
/* Fold a partial checksum without adding pseudo headers. */
static inline unsigned short csum_fold(unsigned int sum)
static inline __sum16 csum_fold(__wsum sum)
{
unsigned int tmp;
@ -93,16 +91,15 @@ static inline unsigned short csum_fold(unsigned int sum)
" addc %1, %%g0, %1\n"
" xnor %%g0, %1, %0\n"
: "=&r" (sum), "=r" (tmp)
: "0" (sum), "1" (sum<<16)
: "0" (sum), "1" ((__force u32)sum<<16)
: "cc");
return (sum & 0xffff);
return (__force __sum16)sum;
}
static inline unsigned long csum_tcpudp_nofold(unsigned long saddr,
unsigned long daddr,
static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
unsigned int len,
unsigned short proto,
unsigned int sum)
__wsum sum)
{
__asm__ __volatile__(
" addcc %1, %0, %0\n"
@ -110,7 +107,7 @@ static inline unsigned long csum_tcpudp_nofold(unsigned long saddr,
" addccc %3, %0, %0\n"
" addc %0, %%g0, %0\n"
: "=r" (sum), "=r" (saddr)
: "r" (daddr), "r" ((proto<<16)+len), "0" (sum), "1" (saddr)
: "r" (daddr), "r" (proto + len), "0" (sum), "1" (saddr)
: "cc");
return sum;
}
@ -119,22 +116,20 @@ static inline unsigned long csum_tcpudp_nofold(unsigned long saddr,
* computes the checksum of the TCP/UDP pseudo-header
* returns a 16-bit checksum, already complemented
*/
static inline unsigned short int csum_tcpudp_magic(unsigned long saddr,
unsigned long daddr,
static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
unsigned short len,
unsigned short proto,
unsigned int sum)
__wsum sum)
{
return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum));
}
#define _HAVE_ARCH_IPV6_CSUM
static inline unsigned short int csum_ipv6_magic(struct in6_addr *saddr,
struct in6_addr *daddr,
__u32 len,
unsigned short proto,
unsigned int sum)
static inline __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
const struct in6_addr *daddr,
__u32 len, unsigned short proto,
__wsum sum)
{
__asm__ __volatile__ (
" addcc %3, %4, %%g7\n"
@ -165,7 +160,7 @@ static inline unsigned short int csum_ipv6_magic(struct in6_addr *saddr,
}
/* this routine is used for miscellaneous IP-like checksums, mainly in icmp.c */
static inline unsigned short ip_compute_csum(unsigned char * buff, int len)
static inline __sum16 ip_compute_csum(const void *buff, int len)
{
return csum_fold(csum_partial(buff, len, 0));
}