netdev - [PATCH net-next 07/10] smc: preserve const qualifier in smc

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Date:   Fri, 17 Mar 2023 15:55:36 +0000
From:   Eric Dumazet <edumazet@...gle.com>
To:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     netdev@...r.kernel.org, David Ahern <dsahern@...nel.org>,
        Simon Horman <simon.horman@...igine.com>,
        Willem de Bruijn <willemb@...gle.com>,
        Matthieu Baerts <matthieu.baerts@...sares.net>,
        eric.dumazet@...il.com, Eric Dumazet <edumazet@...gle.com>,
        Karsten Graul <kgraul@...ux.ibm.com>,
        Wenjia Zhang <wenjia@...ux.ibm.com>,
        Jan Karcher <jaka@...ux.ibm.com>
Subject: [PATCH net-next 07/10] smc: preserve const qualifier in smc_sk()

We can change smc_sk() to propagate its argument const qualifier,
thanks to container_of_const().

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
Cc: Karsten Graul <kgraul@...ux.ibm.com>
Cc: Wenjia Zhang <wenjia@...ux.ibm.com>
Cc: Jan Karcher <jaka@...ux.ibm.com>
---
 net/smc/smc.h | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/net/smc/smc.h b/net/smc/smc.h
index 5ed765ea0c731a7f0095cd6a99a0e42d227eaca9..2eeea4cdc7187eed2a3b12888d8f647382f6f2ac 100644
--- a/net/smc/smc.h
+++ b/net/smc/smc.h
@@ -283,10 +283,7 @@ struct smc_sock {				/* smc sock container */
 						 * */
 };
 
-static inline struct smc_sock *smc_sk(const struct sock *sk)
-{
-	return (struct smc_sock *)sk;
-}
+#define smc_sk(ptr) container_of_const(ptr, struct smc_sock, sk)
 
 static inline void smc_init_saved_callbacks(struct smc_sock *smc)
 {
-- 
2.40.0.rc2.332.ga46443480c-goog