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authorDavid S. Miller <davem@davemloft.net>2010-05-02 02:21:44 -0700
committerDavid S. Miller <davem@davemloft.net>2010-05-02 02:21:44 -0700
commit47d29646a2c1c147d8a7598aeac2c87dd71ed638 (patch)
treeb38f05d82883b5c0fc885812172a546af966d419
parent43815482370c510c569fd18edb57afcb0fa8cab6 (diff)
downloadop-kernel-dev-47d29646a2c1c147d8a7598aeac2c87dd71ed638.zip
op-kernel-dev-47d29646a2c1c147d8a7598aeac2c87dd71ed638.tar.gz
net: Inline skb_pull() in eth_type_trans().
In commit 6be8ac2f ("[NET]: uninline skb_pull, de-bloats a lot") we uninlined skb_pull. But in some critical paths it makes sense to inline this thing and it helps performance significantly. Create an skb_pull_inline() so that we can do this in a way that serves also as annotation. Based upon a patch by Eric Dumazet. Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/linux/skbuff.h5
-rw-r--r--net/core/skbuff.c2
-rw-r--r--net/ethernet/eth.c2
3 files changed, 7 insertions, 2 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 82f5116..746a652 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1128,6 +1128,11 @@ static inline unsigned char *__skb_pull(struct sk_buff *skb, unsigned int len)
return skb->data += len;
}
+static inline unsigned char *skb_pull_inline(struct sk_buff *skb, unsigned int len)
+{
+ return unlikely(len > skb->len) ? NULL : __skb_pull(skb, len);
+}
+
extern unsigned char *__pskb_pull_tail(struct sk_buff *skb, int delta);
static inline unsigned char *__pskb_pull(struct sk_buff *skb, unsigned int len)
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 4218ff4..8b9c109 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -1051,7 +1051,7 @@ EXPORT_SYMBOL(skb_push);
*/
unsigned char *skb_pull(struct sk_buff *skb, unsigned int len)
{
- return unlikely(len > skb->len) ? NULL : __skb_pull(skb, len);
+ return skb_pull_inline(skb, len);
}
EXPORT_SYMBOL(skb_pull);
diff --git a/net/ethernet/eth.c b/net/ethernet/eth.c
index 0c0d272..61ec032 100644
--- a/net/ethernet/eth.c
+++ b/net/ethernet/eth.c
@@ -162,7 +162,7 @@ __be16 eth_type_trans(struct sk_buff *skb, struct net_device *dev)
skb->dev = dev;
skb_reset_mac_header(skb);
- skb_pull(skb, ETH_HLEN);
+ skb_pull_inline(skb, ETH_HLEN);
eth = eth_hdr(skb);
if (unlikely(is_multicast_ether_addr(eth->h_dest))) {
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