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| author | Jörn Engel <joern@wohnheim.fh-wedel.de> | 2006-03-20 21:28:35 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2006-03-20 21:28:35 -0800 |
| commit | 231d06ae826664b83369166449144304859a62fa (patch) | |
| tree | 1c761b91405573f4e787454b454ead8354c3ba23 /net | |
| parent | 2e1f47c74c26a591fc490eb339f1b3167361158b (diff) | |
| download | kernel_samsung_espresso10-231d06ae826664b83369166449144304859a62fa.zip kernel_samsung_espresso10-231d06ae826664b83369166449144304859a62fa.tar.gz kernel_samsung_espresso10-231d06ae826664b83369166449144304859a62fa.tar.bz2 | |
[NET]: Uninline kfree_skb and allow NULL argument
o Uninline kfree_skb, which saves some 15k of object code on my notebook.
o Allow kfree_skb to be called with a NULL argument.
Subsequent patches can remove conditional from drivers and further
reduce source and object size.
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -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 2144952..01abf1e 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -356,6 +356,24 @@ void __kfree_skb(struct sk_buff *skb) } /** + * kfree_skb - free an sk_buff + * @skb: buffer to free + * + * Drop a reference to the buffer and free it if the usage count has + * hit zero. + */ +void kfree_skb(struct sk_buff *skb) +{ + if (unlikely(!skb)) + return; + if (likely(atomic_read(&skb->users) == 1)) + smp_rmb(); + else if (likely(!atomic_dec_and_test(&skb->users))) + return; + __kfree_skb(skb); +} + +/** * skb_clone - duplicate an sk_buff * @skb: buffer to clone * @gfp_mask: allocation priority @@ -1799,6 +1817,7 @@ void __init skb_init(void) EXPORT_SYMBOL(___pskb_trim); EXPORT_SYMBOL(__kfree_skb); +EXPORT_SYMBOL(kfree_skb); EXPORT_SYMBOL(__pskb_pull_tail); EXPORT_SYMBOL(__alloc_skb); EXPORT_SYMBOL(pskb_copy); |