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netfilter: nfnetlink_queue: use xor hash function to distribute instances

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Thanks to Eric Dumazet for suggesting this during the NFWS.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Pablo Neira Ayuso 2013-03-14 06:03:17 +00:00
parent fa900b9cf5
commit 1cdb09056b
1 changed files with 1 additions and 1 deletions
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2
net/netfilter/nfnetlink_queue_core.c
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@ -73,7 +73,7 @@ static struct hlist_head instance_table[INSTANCE_BUCKETS] __read_mostly;
static inline u_int8_t instance_hashfn(u_int16_t queue_num)
{
return ((queue_num >> 8) | queue_num) % INSTANCE_BUCKETS;
return ((queue_num >> 8) ^ queue_num) % INSTANCE_BUCKETS;
}
static struct nfqnl_instance *