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| author | Vineet Gupta <vgupta@synopsys.com> | 2013-01-18 10:42:16 +0100 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2013-02-11 15:30:33 +0100 |
| commit | 64e69073c35439fa19c2ad2a4a18834e0314f071 (patch) | |
| tree | 121d6e719dcf81090ad26778c5d7c89cd43e33e9 | |
| parent | ARC: [optim] uaccess __{get,put}_user() optimised (diff) | |
| download | linux-64e69073c35439fa19c2ad2a4a18834e0314f071.tar.xz linux-64e69073c35439fa19c2ad2a4a18834e0314f071.zip | |
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>
| -rw-r--r-- | include/asm-generic/checksum.h | 4 | ||||
| -rw-r--r-- | lib/checksum.c | 2 |
2 files changed, 6 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, csum_partial_copy((src), (dst), (len), (sum)) #endif +#ifndef ip_fast_csum /* * This is a version of ip_compute_csum() optimized for IP headers, * which always checksum on 4 octet boundaries. */ extern __sum16 ip_fast_csum(const void *iph, unsigned int ihl); +#endif +#ifndef csum_fold /* * Fold a partial checksum */ @@ -54,6 +57,7 @@ static inline __sum16 csum_fold(__wsum csum) sum = (sum & 0xffff) + (sum >> 16); return (__force __sum16)~sum; } +#endif #ifndef csum_tcpudp_nofold /* diff --git a/lib/checksum.c b/lib/checksum.c index 12dceb27ff20..129775eb6de6 100644 --- a/lib/checksum.c +++ b/lib/checksum.c @@ -102,6 +102,7 @@ out: } #endif +#ifndef ip_fast_csum /* * This is a version of ip_compute_csum() optimized for IP headers, * which always checksum on 4 octet boundaries. @@ -111,6 +112,7 @@ __sum16 ip_fast_csum(const void *iph, unsigned int ihl) return (__force __sum16)~do_csum(iph, ihl*4); } EXPORT_SYMBOL(ip_fast_csum); +#endif /* * computes the checksum of a memory block at buff, length len, |