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[NET]: AVR32 checksum annotations and cleanups.

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* sanitize prototypes, annotate
* kill useless shifts
* kill useless ntohs (it's big-endian, for fsck sake!)

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 21:21:15 -08:00 committed by David S. Miller
parent 0ffb7122bc
commit 475b8f311b
1 changed files with 18 additions and 22 deletions
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40
include/asm-avr32/checksum.h
View file

@ -20,8 +20,7 @@
* *
* it's best to have buff aligned on a 32-bit boundary * it's best to have buff aligned on a 32-bit boundary
*/ */
unsigned int csum_partial(const unsigned char * buff, int len, __wsum csum_partial(const void *buff, int len, __wsum sum);
unsigned int sum);
/* /*
* the same as csum_partial, but copies from src while it * the same as csum_partial, but copies from src while it
@ -30,8 +29,8 @@ unsigned int csum_partial(const unsigned char * buff, int len,
* here even more important to align src and dst on a 32-bit (or even * here even more important to align src and dst on a 32-bit (or even
* better 64-bit) boundary * better 64-bit) boundary
*/ */
unsigned int csum_partial_copy_generic(const char *src, char *dst, int len, __wsum csum_partial_copy_generic(const void *src, void *dst, int len,
int sum, int *src_err_ptr, __wsum sum, int *src_err_ptr,
int *dst_err_ptr); int *dst_err_ptr);
/* /*
@ -42,17 +41,17 @@ unsigned int csum_partial_copy_generic(const char *src, char *dst, int len,
* verify_area(). * verify_area().
*/ */
static inline static inline
unsigned int csum_partial_copy_nocheck(const char *src, char *dst, __wsum csum_partial_copy_nocheck(const void *src, void *dst,
int len, int sum) int len, __wsum sum)
{ {
return csum_partial_copy_generic(src, dst, len, sum, NULL, NULL); return csum_partial_copy_generic(src, dst, len, sum, NULL, NULL);
} }
static inline static inline
unsigned int csum_partial_copy_from_user (const char __user *src, char *dst, __wsum csum_partial_copy_from_user(const void __user *src, void *dst,
int len, int sum, int *err_ptr) int len, __wsum sum, int *err_ptr)
{ {
return csum_partial_copy_generic((const char __force *)src, dst, len, return csum_partial_copy_generic((const void __force *)src, dst, len,
sum, err_ptr, NULL); sum, err_ptr, NULL);
} }
@ -60,8 +59,7 @@ unsigned int csum_partial_copy_from_user (const char __user *src, char *dst,
* This is a version of ip_compute_csum() optimized for IP headers, * This is a version of ip_compute_csum() optimized for IP headers,
* which always checksum on 4 octet boundaries. * which always checksum on 4 octet boundaries.
*/ */
static inline unsigned short ip_fast_csum(unsigned char *iph, static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
unsigned int ihl)
{ {
unsigned int sum, tmp; unsigned int sum, tmp;
@ -90,14 +88,14 @@ static inline unsigned short ip_fast_csum(unsigned char *iph,
: "=r"(sum), "=r"(iph), "=r"(ihl), "=r"(tmp) : "=r"(sum), "=r"(iph), "=r"(ihl), "=r"(tmp)
: "1"(iph), "2"(ihl) : "1"(iph), "2"(ihl)
: "memory", "cc"); : "memory", "cc");
return sum; return (__force __sum16)sum;
} }
/* /*
* Fold a partial checksum * Fold a partial checksum
*/ */
static inline unsigned int csum_fold(unsigned int sum) static inline __sum16 csum_fold(__wsum sum)
{ {
unsigned int tmp; unsigned int tmp;
@ -109,21 +107,20 @@ static inline unsigned int csum_fold(unsigned int sum)
: "=&r"(sum), "=&r"(tmp) : "=&r"(sum), "=&r"(tmp)
: "0"(sum)); : "0"(sum));
return ~sum; return (__force __sum16)~sum;
} }
static inline unsigned long csum_tcpudp_nofold(unsigned long saddr, static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
unsigned long daddr,
unsigned short len, unsigned short len,
unsigned short proto, unsigned short proto,
unsigned int sum) __wsum sum)
{ {
asm(" add %0, %1\n" asm(" add %0, %1\n"
" adc %0, %0, %2\n" " adc %0, %0, %2\n"
" adc %0, %0, %3\n" " adc %0, %0, %3\n"
" acr %0" " acr %0"
: "=r"(sum) : "=r"(sum)
: "r"(daddr), "r"(saddr), "r"(ntohs(len) | (proto << 16)), : "r"(daddr), "r"(saddr), "r"(len + proto),
"0"(sum) "0"(sum)
: "cc"); : "cc");
@ -134,11 +131,10 @@ static inline unsigned long csum_tcpudp_nofold(unsigned long saddr,
* computes the checksum of the TCP/UDP pseudo-header * computes the checksum of the TCP/UDP pseudo-header
* returns a 16-bit checksum, already complemented * returns a 16-bit checksum, already complemented
*/ */
static inline unsigned short int csum_tcpudp_magic(unsigned long saddr, static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
unsigned long daddr,
unsigned short len, unsigned short len,
unsigned short proto, unsigned short proto,
unsigned int sum) __wsum sum)
{ {
return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum)); return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum));
} }
@ -148,7 +144,7 @@ static inline unsigned short int csum_tcpudp_magic(unsigned long saddr,
* in icmp.c * 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)); return csum_fold(csum_partial(buff, len, 0));
} }