netdev - [PATCH net-next 07/20] ipv6: shrink struct ipcm6

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Message-Id: <20211115190249.3936899-8-eric.dumazet@gmail.com>
Date:   Mon, 15 Nov 2021 11:02:36 -0800
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev <netdev@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Eric Dumazet <eric.dumazet@...il.com>,
        Soheil Hassas Yeganeh <soheil@...gle.com>,
        Neal Cardwell <ncardwell@...gle.com>,
        Arjun Roy <arjunroy@...gle.com>
Subject: [PATCH net-next 07/20] ipv6: shrink struct ipcm6_cookie

From: Eric Dumazet <edumazet@...gle.com>

gso_size can be moved after tclass, to use an existing hole.
(8 bytes saved on 64bit arches)

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
 include/net/ipv6.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index c19bf51ded1d026e795a3f9ae0ff3be766fc174e..53ac7707ca70af513aef32389afd681bff3082f3 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -345,9 +345,9 @@ struct ipcm6_cookie {
 	struct sockcm_cookie sockc;
 	__s16 hlimit;
 	__s16 tclass;
-	__s8  dontfrag;
-	struct ipv6_txoptions *opt;
 	__u16 gso_size;
+	__s8  dontfrag;
+	struct ipv6_txoptions *opt;
 };
 
 static inline void ipcm6_init(struct ipcm6_cookie *ipc6)
-- 
2.34.0.rc1.387.gb447b232ab-goog