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[NET]: Generic checksum annotations and cleanups.

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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 21:23:59 -08:00
committed by David S. Miller
parent b8e4e01dd5
commit 56649d5d3c
2 changed files with 63 additions and 55 deletions
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76
include/net/ip6_checksum.h
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@ -34,60 +34,60 @@
#ifndef _HAVE_ARCH_IPV6_CSUM
static __inline__ unsigned short int csum_ipv6_magic(struct in6_addr *saddr,
struct in6_addr *daddr,
__u16 len,
unsigned short proto,
unsigned int csum)
static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
const struct in6_addr *daddr,
__u32 len, unsigned short proto,
__wsum csum)
{
int carry;
__u32 ulen;
__u32 uproto;
__u32 sum = (__force u32)csum;
csum += saddr->s6_addr32[0];
carry = (csum < saddr->s6_addr32[0]);
csum += carry;
sum += (__force u32)saddr->s6_addr32[0];
carry = (sum < (__force u32)saddr->s6_addr32[0]);
sum += carry;
csum += saddr->s6_addr32[1];
carry = (csum < saddr->s6_addr32[1]);
csum += carry;
sum += (__force u32)saddr->s6_addr32[1];
carry = (sum < (__force u32)saddr->s6_addr32[1]);
sum += carry;
csum += saddr->s6_addr32[2];
carry = (csum < saddr->s6_addr32[2]);
csum += carry;
sum += (__force u32)saddr->s6_addr32[2];
carry = (sum < (__force u32)saddr->s6_addr32[2]);
sum += carry;
csum += saddr->s6_addr32[3];
carry = (csum < saddr->s6_addr32[3]);
csum += carry;
sum += (__force u32)saddr->s6_addr32[3];
carry = (sum < (__force u32)saddr->s6_addr32[3]);
sum += carry;
csum += daddr->s6_addr32[0];
carry = (csum < daddr->s6_addr32[0]);
csum += carry;
sum += (__force u32)daddr->s6_addr32[0];
carry = (sum < (__force u32)daddr->s6_addr32[0]);
sum += carry;
csum += daddr->s6_addr32[1];
carry = (csum < daddr->s6_addr32[1]);
csum += carry;
sum += (__force u32)daddr->s6_addr32[1];
carry = (sum < (__force u32)daddr->s6_addr32[1]);
sum += carry;
csum += daddr->s6_addr32[2];
carry = (csum < daddr->s6_addr32[2]);
csum += carry;
sum += (__force u32)daddr->s6_addr32[2];
carry = (sum < (__force u32)daddr->s6_addr32[2]);
sum += carry;
csum += daddr->s6_addr32[3];
carry = (csum < daddr->s6_addr32[3]);
csum += carry;
sum += (__force u32)daddr->s6_addr32[3];
carry = (sum < (__force u32)daddr->s6_addr32[3]);
sum += carry;
ulen = htonl((__u32) len);
csum += ulen;
carry = (csum < ulen);
csum += carry;
ulen = (__force u32)htonl((__u32) len);
sum += ulen;
carry = (sum < ulen);
sum += carry;
uproto = htonl(proto);
csum += uproto;
carry = (csum < uproto);
csum += carry;
uproto = (__force u32)htonl(proto);
sum += uproto;
carry = (sum < uproto);
sum += carry;
return csum_fold(csum);
return csum_fold((__force __wsum)csum);
}
#endif