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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2009-01-29 14:19:52 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-01-29 16:33:04 -0800 |
| commit | 80595d59ba9917227856e663da249c2276a8628d (patch) | |
| tree | 4e1a175110c7ea8ee33a59a6d18cc72775332d3e | |
| parent | 81705ad1b2f926d2ef15ed95074a9c1fa9fb4dc4 (diff) | |
| download | linux-3.10-80595d59ba9917227856e663da249c2276a8628d.tar.gz linux-3.10-80595d59ba9917227856e663da249c2276a8628d.tar.bz2 linux-3.10-80595d59ba9917227856e663da249c2276a8628d.zip | |
gro: Open-code memcpy in napi_fraginfo_skb
This patch optimises napi_fraginfo_skb to only copy the bits
necessary. We also open-code the memcpy so that the alignment
information is always available to gcc.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/core/dev.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index df406dcf748..ec5be1c7f2f 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2533,6 +2533,8 @@ struct sk_buff *napi_fraginfo_skb(struct napi_struct *napi, struct net_device *dev = napi->dev; struct sk_buff *skb = napi->skb; struct ethhdr *eth; + skb_frag_t *frag; + int i; napi->skb = NULL; @@ -2545,8 +2547,14 @@ struct sk_buff *napi_fraginfo_skb(struct napi_struct *napi, } BUG_ON(info->nr_frags > MAX_SKB_FRAGS); + frag = &info->frags[info->nr_frags - 1]; + + for (i = skb_shinfo(skb)->nr_frags; i < info->nr_frags; i++) { + skb_fill_page_desc(skb, i, frag->page, frag->page_offset, + frag->size); + frag++; + } skb_shinfo(skb)->nr_frags = info->nr_frags; - memcpy(skb_shinfo(skb)->frags, info->frags, sizeof(info->frags)); skb->data_len = info->len; skb->len += info->len; |