[INET]: Omit double hash calculations in xxx_frag_intern
Since the hash value is already calculated in xxx_find, we can
simply use it later. This is already done in netfilter code,
so make the same in ipv4 and ipv6.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index 6ad19cf..0a1bf43 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -233,16 +233,15 @@
/* Creation primitives. */
-static struct frag_queue *ip6_frag_intern(struct frag_queue *fq_in)
+static struct frag_queue *ip6_frag_intern(struct frag_queue *fq_in,
+ unsigned int hash)
{
struct frag_queue *fq;
- unsigned int hash;
#ifdef CONFIG_SMP
struct hlist_node *n;
#endif
write_lock(&ip6_frags.lock);
- hash = ip6qhashfn(fq_in->id, &fq_in->saddr, &fq_in->daddr);
#ifdef CONFIG_SMP
hlist_for_each_entry(fq, n, &ip6_frags.hash[hash], q.list) {
if (fq->id == fq_in->id &&
@@ -273,7 +272,7 @@
static struct frag_queue *
ip6_frag_create(__be32 id, struct in6_addr *src, struct in6_addr *dst,
- struct inet6_dev *idev)
+ struct inet6_dev *idev, unsigned int hash)
{
struct frag_queue *fq;
@@ -290,7 +289,7 @@
spin_lock_init(&fq->q.lock);
atomic_set(&fq->q.refcnt, 1);
- return ip6_frag_intern(fq);
+ return ip6_frag_intern(fq, hash);
oom:
IP6_INC_STATS_BH(idev, IPSTATS_MIB_REASMFAILS);
@@ -318,7 +317,7 @@
}
read_unlock(&ip6_frags.lock);
- return ip6_frag_create(id, src, dst, idev);
+ return ip6_frag_create(id, src, dst, idev, hash);
}