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| author | Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> | 2008-03-27 17:52:40 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-03-27 17:52:40 -0700 |
| commit | c2aa270ad73d385bd6cdebf5d741bdf18a3e17ad (patch) | |
| tree | 1e8de0edce4f149a9918505f495550c8ac9bac56 /net/core | |
| parent | f58518e678e5eef430c8d5cdcc7cd28d285f1980 (diff) | |
| download | linux-c2aa270ad73d385bd6cdebf5d741bdf18a3e17ad.tar.bz2 | |
[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>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/skbuff.c | 19 |
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 |