[RFC PATCH 4/8] [NET]: uninline skb_push, de-bloats a lot

From: Ilpo Järvinen
Date: Wed Feb 20 2008 - 08:48:35 EST


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

Again, current_text_addr() needs to addressed.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxx>
---
include/linux/skbuff.h | 18 +-----------------
net/core/skbuff.c | 19 +++++++++++++++++++
2 files changed, 20 insertions(+), 17 deletions(-)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index df3cce2..c11f248 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -905,23 +905,7 @@ static inline unsigned char *__skb_push(struct sk_buff *skb, unsigned int len)
return skb->data;
}

-/**
- * 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.
- */
-static inline 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, current_text_addr());
- return skb->data;
-}
+extern unsigned char *skb_push(struct sk_buff *skb, unsigned int len);

static inline unsigned char *__skb_pull(struct sk_buff *skb, unsigned int len)
{
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 081bffb..05d43fd 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, current_text_addr());
+ 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
--
1.5.2.2

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