[NET]: uninline skb_push, de-bloats a lot

Allyesconfig (v2.6.24-mm1):

-21593  356 funcs, 2418 +, 24011 -, diff: -21593 --- skb_push

Without many debug related CONFIGs (v2.6.25-rc2-mm1):

-13890  341 funcs, 189 +, 14079 -, diff: -13890 --- skb_push
skb_push                      |  +46

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 19 insertions, 0 deletions

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 0daf5c0e5b8d..a37127b5899c 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -897,6 +897,25 @@ unsigned char *skb_put(struct sk_buff *skb, unsigned int len)
 EXPORT_SYMBOL(skb_put);
 
 /**
+ *      skb_push - add data to the start of a buffer
+ *      @skb: buffer to use
+ *      @len: amount of data to add
+ *
+ *      This function extends the used data area of the buffer at the buffer
+ *      start. If this would exceed the total buffer headroom the kernel will
+ *      panic. A pointer to the first byte of the extra data is returned.
+ */
+unsigned char *skb_push(struct sk_buff *skb, unsigned int len)
+{
+        skb->data -= len;
+        skb->len  += len;
+        if (unlikely(skb->data<skb->head))
+                skb_under_panic(skb, len, __builtin_return_address(0));
+        return skb->data;
+}
+EXPORT_SYMBOL(skb_push);
+
+/**
  *      skb_pull - remove data from the start of a buffer
  *      @skb: buffer to use
  *      @len: amount of data to remove