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authorVineet Gupta <vgupta@synopsys.com>2013-01-18 04:42:16 -0500
committerVineet Gupta <vgupta@synopsys.com>2013-02-11 09:30:33 -0500
commit64e69073c35439fa19c2ad2a4a18834e0314f071 (patch)
tree121d6e719dcf81090ad26778c5d7c89cd43e33e9 /include/asm-generic
parent0a5eae458e923af9968679fd75fd1f7670200bc3 (diff)
asm-generic headers: Allow yet more arch overrides in checksum.h
arches can have more efficient implementation of these routines Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'include/asm-generic')
-rw-r--r--include/asm-generic/checksum.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/asm-generic/checksum.h b/include/asm-generic/checksum.h
index c084767c88bc..59811df58c5b 100644
--- a/include/asm-generic/checksum.h
+++ b/include/asm-generic/checksum.h
@@ -38,12 +38,15 @@ extern __wsum csum_partial_copy_from_user(const void __user *src, void *dst,
38 csum_partial_copy((src), (dst), (len), (sum)) 38 csum_partial_copy((src), (dst), (len), (sum))
39#endif 39#endif
40 40
41#ifndef ip_fast_csum
41/* 42/*
42 * This is a version of ip_compute_csum() optimized for IP headers, 43 * This is a version of ip_compute_csum() optimized for IP headers,
43 * which always checksum on 4 octet boundaries. 44 * which always checksum on 4 octet boundaries.
44 */ 45 */
45extern __sum16 ip_fast_csum(const void *iph, unsigned int ihl); 46extern __sum16 ip_fast_csum(const void *iph, unsigned int ihl);
47#endif
46 48
49#ifndef csum_fold
47/* 50/*
48 * Fold a partial checksum 51 * Fold a partial checksum
49 */ 52 */
@@ -54,6 +57,7 @@ static inline __sum16 csum_fold(__wsum csum)
54 sum = (sum & 0xffff) + (sum >> 16); 57 sum = (sum & 0xffff) + (sum >> 16);
55 return (__force __sum16)~sum; 58 return (__force __sum16)~sum;
56} 59}
60#endif
57 61
58#ifndef csum_tcpudp_nofold 62#ifndef csum_tcpudp_nofold
59/* 63/*