From 407db475d505d5aa4c2352b80e429a02f5ccd1e4 Mon Sep 17 00:00:00 2001
From: Eric Dumazet <edumazet@google.com>
Date: Fri, 17 Mar 2023 15:55:36 +0000
Subject: [PATCH] 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@google.com>
Cc: Karsten Graul <kgraul@linux.ibm.com>
Cc: Wenjia Zhang <wenjia@linux.ibm.com>
Cc: Jan Karcher <jaka@linux.ibm.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Reviewed-by: Wenjia Zhang <wenjia@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 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 5ed765e..2eeea4c 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)
 {
-- 
2.7.4