netdev - [PATCH net-next] tcp: change ICSK_CA_PRIV

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Message-Id: <20210629135314.1070666-1-eric.dumazet@gmail.com>
Date:   Tue, 29 Jun 2021 06:53:14 -0700
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>
Subject: [PATCH net-next] tcp: change ICSK_CA_PRIV_SIZE definition

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

Instead of a magic number (13 currently) and having
to change it every other year, use sizeof_field() macro.

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
 include/net/inet_connection_sock.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h
index 3c8c59471bc19d53c0cebd4a7e5ef42886d34783..b06c2d02ec84e96c6222ac608473d7eaf71e5590 100644
--- a/include/net/inet_connection_sock.h
+++ b/include/net/inet_connection_sock.h
@@ -135,7 +135,7 @@ struct inet_connection_sock {
 	u32			  icsk_user_timeout;
 
 	u64			  icsk_ca_priv[104 / sizeof(u64)];
-#define ICSK_CA_PRIV_SIZE      (13 * sizeof(u64))
+#define ICSK_CA_PRIV_SIZE	  sizeof_field(struct inet_connection_sock, icsk_ca_priv)
 };
 
 #define ICSK_TIME_RETRANS	1	/* Retransmit timer */
-- 
2.32.0.93.g670b81a890-goog