netdev - [PATCH net] inet: properly align icsk_ca

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Date:	Mon, 18 May 2015 17:06:14 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Stephen Hemminger <stephen@...workplumber.org>,
	Fan Du <fan.du@...el.com>, David Miller <davem@...emloft.net>
Cc:	Kenneth Klette Jonassen <kennetkl@....uio.no>,
	netdev@...r.kernel.org, David Hayes <davihay@....uio.no>,
	Yuchung Cheng <ycheng@...gle.com>,
	Andreas Petlund <apetlund@...ula.no>
Subject: [PATCH net] inet: properly align icsk_ca_priv

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

tcp_illinois and upcoming tcp_cdg require 64bit alignment of
icsk_ca_priv

x86 does not care, but other architectures might.

Fixes: 05cbc0db03e82 ("ipv4: Create probe timer for tcp PMTU as per RFC4821")
Signed-off-by: Eric Dumazet <edumazet@...gle.com>
Cc: Fan Du <fan.du@...el.com>
---
 include/net/inet_connection_sock.h |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h
index 48a8158235874b1625c65651b0bd92eedd999fe5..497bc14cdb85f4f8b33da8fbe7aba9d491df50e2 100644
--- a/include/net/inet_connection_sock.h
+++ b/include/net/inet_connection_sock.h
@@ -129,9 +129,10 @@ struct inet_connection_sock {
 
 		u32		  probe_timestamp;
 	} icsk_mtup;
-	u32			  icsk_ca_priv[16];
 	u32			  icsk_user_timeout;
-#define ICSK_CA_PRIV_SIZE	(16 * sizeof(u32))
+
+	u64			  icsk_ca_priv[64 / sizeof(u64)];
+#define ICSK_CA_PRIV_SIZE      (8 * sizeof(u64))
 };
 
 #define ICSK_TIME_RETRANS	1	/* Retransmit timer */


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