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yaml
---
r: 41706
b: refs/heads/master
c: d5c6393
h: refs/heads/master
v: v3
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Al Viro authored and David S. Miller committed Dec 3, 2006
1 parent 45f3456 commit bc33bea
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Showing 2 changed files with 37 additions and 42 deletions.
2 changes: 1 addition & 1 deletion [refs]
Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: 16ec7e168db6747e69b101b86ddf86f001fdcd60
refs/heads/master: d5c63936410fbcabd92df1ac12f3f63ca23c7a86
77 changes: 36 additions & 41 deletions trunk/include/asm-sparc64/checksum.h
Original file line number Diff line number Diff line change
Expand Up @@ -30,60 +30,58 @@
*
* 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
*
* 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 long __csum_partial_copy_from_user(const unsigned char __user *src,
unsigned char *dst, int len,
unsigned int 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)
extern __wsum csum_partial_copy_nocheck(const void *src, void *dst,
int len, __wsum sum);

extern long __csum_partial_copy_from_user(const void __user *src,
void *dst, int len,
__wsum sum);

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);

static inline unsigned int
csum_and_copy_to_user(const unsigned char *src,
unsigned char __user *dst, int len,
unsigned int sum, int *err)
extern long __csum_partial_copy_to_user(const void *src,
void __user *dst, int len,
__wsum sum);

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;

Expand All @@ -93,24 +91,23 @@ 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"
" addccc %2, %0, %0\n"
" 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;
}
Expand All @@ -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"
Expand Down Expand Up @@ -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));
}
Expand Down

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