From 89304f91bf8efe832557b00f034493420f16dbdb Mon Sep 17 00:00:00 2001
From: Eric Dumazet <edumazet@google.com>
Date: Fri, 2 Feb 2024 10:14:03 +0000
Subject: sctp: preserve const qualifier in sctp_sk()

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

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Cc: Xin Long <lucien.xin@gmail.com>
Acked-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 include/net/sctp/structs.h | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index 5a24d6d8522a..f24a1bbcb3ef 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -242,10 +242,7 @@ struct sctp_sock {
 	int do_auto_asconf;
 };
 
-static inline struct sctp_sock *sctp_sk(const struct sock *sk)
-{
-       return (struct sctp_sock *)sk;
-}
+#define sctp_sk(ptr) container_of_const(ptr, struct sctp_sock, inet.sk)
 
 static inline struct sock *sctp_opt2sk(const struct sctp_sock *sp)
 {
-- 
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