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netfilter: nf_conntrack: avoid additional compare. 

Signed-off-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
This commit is contained in:
Changli Gao 2009-11-05 14:51:31 +01:00 committed by Patrick McHardy
parent 9481721be1
commit 5ae27aa2b1
1 changed files with 10 additions and 4 deletions
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14
net/netfilter/nf_conntrack_core.c
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@ -511,11 +511,17 @@ static noinline int early_drop(struct net *net, unsigned int hash)
cnt++;
}
if (ct && unlikely(nf_ct_is_dying(ct) ||
!atomic_inc_not_zero(&ct->ct_general.use)))
ct = NULL;
if (ct || cnt >= NF_CT_EVICTION_RANGE)
if (ct != NULL) {
if (likely(!nf_ct_is_dying(ct) &&
atomic_inc_not_zero(&ct->ct_general.use)))
break;
else
ct = NULL;
}
if (cnt >= NF_CT_EVICTION_RANGE)
break;
hash = (hash + 1) % nf_conntrack_htable_size;
}
rcu_read_unlock();