net: sock_free() optimizations

Avoid two extra instructions in sock_free(), to reload skb->truesize and skb->sk Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
git-mirror · Jul 13, 2010 · d361fd5 · d361fd5
1 parent 7ba4291
commit d361fd5
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/net/core/sock.c b/net/core/sock.c
@@ -1339,9 +1339,10 @@ EXPORT_SYMBOL(sock_wfree);
 void sock_rfree(struct sk_buff *skb)
 {
 	struct sock *sk = skb->sk;
+	unsigned int len = skb->truesize;
 
-	atomic_sub(skb->truesize, &sk->sk_rmem_alloc);
-	sk_mem_uncharge(skb->sk, skb->truesize);
+	atomic_sub(len, &sk->sk_rmem_alloc);
+	sk_mem_uncharge(sk, len);
 }
 EXPORT_SYMBOL(sock_rfree);