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authorEric Dumazet <eric.dumazet@gmail.com>2010-06-03 22:23:57 +0000
committerDavid S. Miller <davem@davemloft.net>2010-06-07 01:08:10 -0700
commit1789a640f55658d9a54c1868cc3405e4d85dbd8e (patch)
tree4ff0efbe06c9f8ab2ff715bfcda91dc31d7c7f65 /net/ipv4/raw.c
parentfe33147a58e7d1d3086bf823aabfd491d843be82 (diff)
raw: avoid two atomics in xmit
Avoid two atomic ops per raw_send_hdrinc() call Avoid two atomic ops per raw6_send_hdrinc() call Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/raw.c')
-rw-r--r--net/ipv4/raw.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
index 2c7a1639388..66cc3befcd4 100644
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -314,7 +314,7 @@ int raw_rcv(struct sock *sk, struct sk_buff *skb)
}
static int raw_send_hdrinc(struct sock *sk, void *from, size_t length,
- struct rtable *rt,
+ struct rtable **rtp,
unsigned int flags)
{
struct inet_sock *inet = inet_sk(sk);
@@ -323,6 +323,7 @@ static int raw_send_hdrinc(struct sock *sk, void *from, size_t length,
struct sk_buff *skb;
unsigned int iphlen;
int err;
+ struct rtable *rt = *rtp;
if (length > rt->u.dst.dev->mtu) {
ip_local_error(sk, EMSGSIZE, rt->rt_dst, inet->inet_dport,
@@ -341,7 +342,8 @@ static int raw_send_hdrinc(struct sock *sk, void *from, size_t length,
skb->priority = sk->sk_priority;
skb->mark = sk->sk_mark;
- skb_dst_set(skb, dst_clone(&rt->u.dst));
+ skb_dst_set(skb, &rt->u.dst);
+ *rtp = NULL;
skb_reset_network_header(skb);
iph = ip_hdr(skb);
@@ -576,7 +578,7 @@ back_from_confirm:
if (inet->hdrincl)
err = raw_send_hdrinc(sk, msg->msg_iov, len,
- rt, msg->msg_flags);
+ &rt, msg->msg_flags);
else {
if (!ipc.addr)