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Commit 6be8ac2f authored by Ilpo Järvinen's avatar Ilpo Järvinen Committed by David S. Miller
Browse files

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



Allyesconfig (v2.6.24-mm1):

-28162  354 funcs, 3005 +, 31167 -, diff: -28162 --- skb_pull

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

-9697  338 funcs, 221 +, 9918 -, diff: -9697 --- skb_pull
skb_pull                      |  +44

Signed-off-by: default avatarIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 0dde3e16

include/linux/skbuff.h

+1 −15
Original line number Diff line number Diff line
@@ -927,6 +927,7 @@ static inline unsigned char *skb_push(struct sk_buff *skb, unsigned int len) 
	return skb->data;

}



extern unsigned char *skb_pull(struct sk_buff *skb, unsigned int len);

static inline unsigned char *__skb_pull(struct sk_buff *skb, unsigned int len)

{

	skb->len -= len;
@@ -934,21 +935,6 @@ static inline unsigned char *__skb_pull(struct sk_buff *skb, unsigned int len) 
	return skb->data += len;

}



/**

 *	skb_pull - remove data from the start of a buffer

 *	@skb: buffer to use

 *	@len: amount of data to remove

 *

 *	This function removes data from the start of a buffer, returning

 *	the memory to the headroom. A pointer to the next data in the buffer

 *	is returned. Once the data has been pulled future pushes will overwrite

 *	the old data.

 */

static inline unsigned char *skb_pull(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)

net/core/skbuff.c

+16 −0
Original line number Diff line number Diff line
@@ -878,6 +878,22 @@ unsigned char *skb_put(struct sk_buff *skb, unsigned int len) 
}

EXPORT_SYMBOL(skb_put);



/**

 *	skb_pull - remove data from the start of a buffer

 *	@skb: buffer to use

 *	@len: amount of data to remove

 *

 *	This function removes data from the start of a buffer, returning

 *	the memory to the headroom. A pointer to the next data in the buffer

 *	is returned. Once the data has been pulled future pushes will overwrite

 *	the old data.

 */

unsigned char *skb_pull(struct sk_buff *skb, unsigned int len)

{

	return unlikely(len > skb->len) ? NULL : __skb_pull(skb, len);

}

EXPORT_SYMBOL(skb_pull);



/* Trims skb to length len. It can change skb pointers.

 */