netdev - [PATCH net-next 04/10] ipv6: raw: preserve const qualifier in raw6

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Date:   Fri, 17 Mar 2023 15:55:33 +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>
Subject: [PATCH net-next 04/10] ipv6: raw: preserve const qualifier in raw6_sk()

We can change raw6_sk() to propagate its argument const qualifier,
thanks to container_of_const().

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
 include/linux/ipv6.h | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h
index 37dfdcfcdd542fe0efc9a1df967be3da931635d4..839247a4f48ea76b5d6daa9a54a7b87627635066 100644
--- a/include/linux/ipv6.h
+++ b/include/linux/ipv6.h
@@ -336,10 +336,7 @@ static inline struct ipv6_pinfo *inet6_sk(const struct sock *__sk)
 	return sk_fullsock(__sk) ? inet_sk(__sk)->pinet6 : NULL;
 }
 
-static inline struct raw6_sock *raw6_sk(const struct sock *sk)
-{
-	return (struct raw6_sock *)sk;
-}
+#define raw6_sk(ptr) container_of_const(ptr, struct raw6_sock, inet.sk)
 
 #define ipv6_only_sock(sk)	(sk->sk_ipv6only)
 #define ipv6_sk_rxinfo(sk)	((sk)->sk_family == PF_INET6 && \
-- 
2.40.0.rc2.332.ga46443480c-goog