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| author | David S. Miller <davem@davemloft.net> | 2010-05-02 02:21:44 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-05-02 02:21:44 -0700 |
| commit | 47d29646a2c1c147d8a7598aeac2c87dd71ed638 (patch) | |
| tree | b38f05d82883b5c0fc885812172a546af966d419 | |
| parent | 43815482370c510c569fd18edb57afcb0fa8cab6 (diff) | |
| download | kernel_samsung_tuna-47d29646a2c1c147d8a7598aeac2c87dd71ed638.zip kernel_samsung_tuna-47d29646a2c1c147d8a7598aeac2c87dd71ed638.tar.gz kernel_samsung_tuna-47d29646a2c1c147d8a7598aeac2c87dd71ed638.tar.bz2 | |
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.h | 5 | ||||
| -rw-r--r-- | net/core/skbuff.c | 2 | ||||
| -rw-r--r-- | net/ethernet/eth.c | 2 |
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))) { |