This source file includes following definitions.
- csum_fold
1
2 #ifndef _ASM_IA64_CHECKSUM_H
3 #define _ASM_IA64_CHECKSUM_H
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14 extern __sum16 ip_fast_csum(const void *iph, unsigned int ihl);
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20 extern __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
21 __u32 len, __u8 proto, __wsum sum);
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23 extern __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
24 __u32 len, __u8 proto, __wsum sum);
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38 extern __wsum csum_partial(const void *buff, int len, __wsum sum);
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46 extern __wsum csum_partial_copy_from_user(const void __user *src, void *dst,
47 int len, __wsum sum,
48 int *errp);
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50 extern __wsum csum_partial_copy_nocheck(const void *src, void *dst,
51 int len, __wsum sum);
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57 extern __sum16 ip_compute_csum(const void *buff, int len);
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62 static inline __sum16 csum_fold(__wsum csum)
63 {
64 u32 sum = (__force u32)csum;
65 sum = (sum & 0xffff) + (sum >> 16);
66 sum = (sum & 0xffff) + (sum >> 16);
67 return (__force __sum16)~sum;
68 }
69
70 #define _HAVE_ARCH_IPV6_CSUM 1
71 struct in6_addr;
72 extern __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
73 const struct in6_addr *daddr,
74 __u32 len, __u8 proto, __wsum csum);
75
76 #endif