netdev - [PATCH net-next 03/10] raw: preserve const qualifier in raw

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Message-ID: <20230317155539.2552954-4-edumazet@google.com>
Date:   Fri, 17 Mar 2023 15:55:32 +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 03/10] raw: preserve const qualifier in raw_sk()

We can change raw_sk() to propagate const qualifier of its argument,
thanks to container_of_const()

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

diff --git a/include/net/raw.h b/include/net/raw.h
index 7ad15830cf38460f1fae3a187986d74faef6dd1d..c215af02f7589ee5e77a7c3f89cb216fab638c4c 100644
--- a/include/net/raw.h
+++ b/include/net/raw.h
@@ -83,10 +83,7 @@ struct raw_sock {
 	u32		   ipmr_table;
 };
 
-static inline struct raw_sock *raw_sk(const struct sock *sk)
-{
-	return (struct raw_sock *)sk;
-}
+#define raw_sk(ptr) container_of_const(ptr, struct raw_sock, inet.sk)
 
 static inline bool raw_sk_bound_dev_eq(struct net *net, int bound_dev_if,
 				       int dif, int sdif)
-- 
2.40.0.rc2.332.ga46443480c-goog