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>
diff --git a/net/core/dev.c b/net/core/dev.c
index df406dc..ec5be1c 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2533,6 +2533,8 @@
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 @@
}
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;