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@google.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h
index 37dfdcfcdd542fe0efc9a1df967be3da931635d4..839247a4f48ea76b5d6daa9a54a7b87627635066 100644 (file)
--- 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 && \