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https://github.com/openvswitch/ovs
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705e9260d5
This patch mostly is related to tunnel API where RHEL 7 kernel API are not in-sync with newer linux kernel API. So extra checks are required to check for parameters of API. Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Acked-by: Jiri Benc <jbenc@redhat.com>
45 lines
1.2 KiB
C
45 lines
1.2 KiB
C
#ifndef _LINUX_HASH_WRAPPER_H
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#define _LINUX_HASH_WRAPPER_H
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#include_next <linux/hash.h>
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#include <asm/hash.h>
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#ifndef HAVE_FAST_HASH_OPS
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struct fast_hash_ops {
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u32 (*hash)(const void *data, u32 len, u32 seed);
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u32 (*hash2)(const u32 *data, u32 len, u32 seed);
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};
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/**
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* arch_fast_hash - Caclulates a hash over a given buffer that can have
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* arbitrary size. This function will eventually use an
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* architecture-optimized hashing implementation if
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* available, and trades off distribution for speed.
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*
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* @data: buffer to hash
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* @len: length of buffer in bytes
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* @seed: start seed
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*
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* Returns 32bit hash.
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*/
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extern u32 arch_fast_hash(const void *data, u32 len, u32 seed);
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/**
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* arch_fast_hash2 - Caclulates a hash over a given buffer that has a
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* size that is of a multiple of 32bit words. This
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* function will eventually use an architecture-
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* optimized hashing implementation if available,
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* and trades off distribution for speed.
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*
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* @data: buffer to hash (must be 32bit padded)
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* @len: number of 32bit words
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* @seed: start seed
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*
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* Returns 32bit hash.
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*/
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extern u32 arch_fast_hash2(const u32 *data, u32 len, u32 seed);
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#endif /* !HASH_FAST_HASH_OPS */
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#endif /* _LINUX_HASH_WRAPPER_H */
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