gro: Localise offset/headlen in skb_gro_offset
This patch stores the offset/headlen in local variables as they're
used repeatedly in skb_gro_offset.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index c88426b..168e949 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -2666,13 +2666,15 @@
struct sk_buff *nskb;
unsigned int headroom;
unsigned int len = skb_gro_len(skb);
+ unsigned int offset = skb_gro_offset(skb);
+ unsigned int headlen = skb_headlen(skb);
if (p->len + len >= 65536)
return -E2BIG;
if (skb_shinfo(p)->frag_list)
goto merge;
- else if (skb_headlen(skb) <= skb_gro_offset(skb)) {
+ else if (headlen <= offset) {
skb_frag_t *frag;
int i;
@@ -2680,10 +2682,8 @@
MAX_SKB_FRAGS)
return -E2BIG;
- skb_shinfo(skb)->frags[0].page_offset +=
- skb_gro_offset(skb) - skb_headlen(skb);
- skb_shinfo(skb)->frags[0].size -=
- skb_gro_offset(skb) - skb_headlen(skb);
+ skb_shinfo(skb)->frags[0].page_offset += offset - headlen;
+ skb_shinfo(skb)->frags[0].size -= offset - headlen;
frag = skb_shinfo(p)->frags + skb_shinfo(p)->nr_frags;
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++)
@@ -2736,16 +2736,13 @@
p = nskb;
merge:
- if (skb_gro_offset(skb) > skb_headlen(skb)) {
- skb_shinfo(skb)->frags[0].page_offset +=
- skb_gro_offset(skb) - skb_headlen(skb);
- skb_shinfo(skb)->frags[0].size -=
- skb_gro_offset(skb) - skb_headlen(skb);
- skb_gro_reset_offset(skb);
- skb_gro_pull(skb, skb_headlen(skb));
+ if (offset > headlen) {
+ skb_shinfo(skb)->frags[0].page_offset += offset - headlen;
+ skb_shinfo(skb)->frags[0].size -= offset - headlen;
+ offset = headlen;
}
- __skb_pull(skb, skb_gro_offset(skb));
+ __skb_pull(skb, offset);
p->prev->next = skb;
p->prev = skb;