netdev - [PATCH net-next 08/10] x25: preserve const qualifier in [a]x25

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Date:   Fri, 17 Mar 2023 15:55:37 +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 08/10] x25: preserve const qualifier in [a]x25_sk()

We can change [a]x25_sk() to propagate their argument const qualifier,
thanks to container_of_const().

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
 include/net/ax25.h | 5 +----
 include/net/x25.h  | 5 +----
 2 files changed, 2 insertions(+), 8 deletions(-)

diff --git a/include/net/ax25.h b/include/net/ax25.h
index f8cf3629a41934f96f33e5d70ad90cc8ae796d38..0d939e5aee4eca38d2b1bd86f87fe3cd990af67b 100644
--- a/include/net/ax25.h
+++ b/include/net/ax25.h
@@ -260,10 +260,7 @@ struct ax25_sock {
 	struct ax25_cb		*cb;
 };
 
-static inline struct ax25_sock *ax25_sk(const struct sock *sk)
-{
-	return (struct ax25_sock *) sk;
-}
+#define ax25_sk(ptr) container_of_const(ptr, struct ax25_sock, sk)
 
 static inline struct ax25_cb *sk_to_ax25(const struct sock *sk)
 {
diff --git a/include/net/x25.h b/include/net/x25.h
index d7d6c2b4ffa7153b0caef7dd249ba93f5f39e414..597eb53c471e3386108447d46b054852abfcce6c 100644
--- a/include/net/x25.h
+++ b/include/net/x25.h
@@ -177,10 +177,7 @@ struct x25_forward {
 	atomic_t		refcnt;
 };
 
-static inline struct x25_sock *x25_sk(const struct sock *sk)
-{
-	return (struct x25_sock *)sk;
-}
+#define x25_sk(ptr) container_of_const(ptr, struct x25_sock, sk)
 
 /* af_x25.c */
 extern int  sysctl_x25_restart_request_timeout;
-- 
2.40.0.rc2.332.ga46443480c-goog