netdev - [PATCH net-next 4/6] inet: move ir

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Message-Id: <1426565180-26844-5-git-send-email-edumazet@google.com>
Date:	Mon, 16 Mar 2015 21:06:18 -0700
From:	Eric Dumazet <edumazet@...gle.com>
To:	"David S. Miller" <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, Pablo Neira Ayuso <pablo@...filter.org>,
	Eric Dumazet <edumazet@...gle.com>
Subject: [PATCH net-next 4/6] inet: move ir_mark to fill a hole

On 64bit arches, we can save 8 bytes in inet_request_sock
by moving ir_mark to fill a hole.

While we are at it, inet_request_mark() can get a const qualifier
for listener socket.

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
 include/net/inet_sock.h | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/include/net/inet_sock.h b/include/net/inet_sock.h
index 3d8c09abb097..c9ed91891887 100644
--- a/include/net/inet_sock.h
+++ b/include/net/inet_sock.h
@@ -94,11 +94,11 @@ struct inet_request_sock {
 				acked	   : 1,
 				no_srccheck: 1;
 	kmemcheck_bitfield_end(flags);
+	u32                     ir_mark;
 	union {
 		struct ip_options_rcu	*opt;
 		struct sk_buff		*pktopts;
 	};
-	u32                     ir_mark;
 };
 
 static inline struct inet_request_sock *inet_rsk(const struct request_sock *sk)
@@ -106,13 +106,12 @@ static inline struct inet_request_sock *inet_rsk(const struct request_sock *sk)
 	return (struct inet_request_sock *)sk;
 }
 
-static inline u32 inet_request_mark(struct sock *sk, struct sk_buff *skb)
+static inline u32 inet_request_mark(const struct sock *sk, struct sk_buff *skb)
 {
-	if (!sk->sk_mark && sock_net(sk)->ipv4.sysctl_tcp_fwmark_accept) {
+	if (!sk->sk_mark && sock_net(sk)->ipv4.sysctl_tcp_fwmark_accept)
 		return skb->mark;
-	} else {
-		return sk->sk_mark;
-	}
+
+	return sk->sk_mark;
 }
 
 struct inet_cork {
-- 
2.2.0.rc0.207.ga3a616c

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