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Date: Fri, 8 May 2020 14:04:57 +0200 From: Stephen Kitt <steve@....org> To: "David S . Miller" <davem@...emloft.net>, Joe Perches <joe@...ches.com>, Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org Cc: linux-kernel@...r.kernel.org, Stephen Kitt <steve@....org> Subject: [PATCH v2] net: Protect INET_ADDR_COOKIE on 32-bit architectures Commit c7228317441f ("net: Use a more standard macro for INET_ADDR_COOKIE") added a __deprecated marker to the cookie name on 32-bit architectures, with the intent that the compiler would flag uses of the name. However since commit 771c035372a0 ("deprecate the '__deprecated' attribute warnings entirely and for good"), __deprecated doesn't do anything and should be avoided. This patch changes INET_ADDR_COOKIE to declare a dummy struct so that any subsequent use of the cookie's name will in all likelihood break the build. It also removes the __deprecated marker. Signed-off-by: Stephen Kitt <steve@....org> --- Changes since v1: - use a dummy struct rather than a typedef include/net/inet_hashtables.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/include/net/inet_hashtables.h b/include/net/inet_hashtables.h index ad64ba6a057f..889d9b00c905 100644 --- a/include/net/inet_hashtables.h +++ b/include/net/inet_hashtables.h @@ -301,8 +301,9 @@ static inline struct sock *inet_lookup_listener(struct net *net, ((__sk)->sk_bound_dev_if == (__sdif))) && \ net_eq(sock_net(__sk), (__net))) #else /* 32-bit arch */ +/* Break the build if anything tries to use the cookie's name. */ #define INET_ADDR_COOKIE(__name, __saddr, __daddr) \ - const int __name __deprecated __attribute__((unused)) + struct {} __name __attribute__((unused)) #define INET_MATCH(__sk, __net, __cookie, __saddr, __daddr, __ports, __dif, __sdif) \ (((__sk)->sk_portpair == (__ports)) && \ -- 2.20.1
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