From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Sat, 10 Jul 2010 22:45:17 +0000 (+0000)
Subject: net: sock_free() optimizations
X-Git-Tag: v2.6.36-rc1~571^2~252
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=d361fd599a991ff6c1d522a599c635b35d61ef30;hp=7ba42910073f8432934d61a6c08b1023c408fb62;p=karo-tx-linux.git

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>
---

diff --git a/net/core/sock.c b/net/core/sock.c
index fef2434b7c8c..363bc260157c 100644
--- 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);