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[NET]: M68K checksum annotations and cleanups.

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* sanitize prototypes, annotate

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 21:17:19 -08:00
committed by David S. Miller
parent 85d20dee20
commit 2061acaaae
2 changed files with 28 additions and 31 deletions
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include/asm-m68k/checksum.h
+22 -24
View File
@@ -15,7 +15,7 @@
*
* 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
@@ -25,22 +25,21 @@ unsigned int csum_partial(const unsigned char * buff, int len, unsigned int sum)
* better 64-bit) boundary
*/
extern unsigned int csum_partial_copy_from_user(const unsigned char __user *src,
unsigned char *dst,
int len, int sum,
extern __wsum csum_partial_copy_from_user(const void __user *src,
void *dst,
int len, __wsum sum,
int *csum_err);
extern unsigned int csum_partial_copy_nocheck(const unsigned char *src,
unsigned char *dst, int len,
int sum);
extern __wsum csum_partial_copy_nocheck(const void *src,
void *dst, int len,
__wsum sum);
/*
* This is a version of ip_compute_csum() optimized for IP headers,
* which always checksum on 4 octet boundaries.
*
*/
static inline unsigned short
ip_fast_csum(unsigned char *iph, unsigned int ihl)
static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
{
unsigned int sum = 0;
unsigned long tmp;
@@ -58,29 +57,29 @@ ip_fast_csum(unsigned char *iph, unsigned int ihl)
: "=d" (sum), "=&a" (iph), "=&d" (ihl), "=&d" (tmp)
: "0" (sum), "1" (iph), "2" (ihl)
: "memory");
return ~sum;
return (__force __sum16)~sum;
}
/*
* Fold a partial checksum
*/
static inline unsigned int csum_fold(unsigned int sum)
static inline __sum16 csum_fold(__wsum sum)
{
unsigned int tmp = sum;
unsigned int tmp = (__force u32)sum;
__asm__("swap %1\n\t"
"addw %1, %0\n\t"
"clrw %1\n\t"
"addxw %1, %0"
: "=&d" (sum), "=&d" (tmp)
: "0" (sum), "1" (tmp));
return ~sum;
return (__force __sum16)~sum;
}
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__ ("addl %2,%0\n\t"
"addxl %3,%0\n\t"
@@ -98,9 +97,9 @@ csum_tcpudp_nofold(unsigned long saddr, unsigned long daddr, unsigned short len,
* 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, 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));
}
@@ -110,16 +109,15 @@ csum_tcpudp_magic(unsigned long saddr, unsigned long daddr, unsigned short len,
* 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));
}
#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)
{
register unsigned long tmp;
__asm__("addl %2@,%0\n\t"