netdev - Re: [PATCH] net: secure_seq: Move net_secret_init() definition into CONFIG

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Date:	Sat, 5 Oct 2013 17:26:59 -0300
From:	Fabio Estevam <festevam@...il.com>
To:	"David S. Miller" <davem@...emloft.net>
Cc:	edumazet <edumazet@...gle.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Olof Johansson <olof@...om.net>,
	Fabio Estevam <fabio.estevam@...escale.com>,
	Hannes Frederic Sowa <hannes@...essinduktion.org>
Subject: Re: [PATCH] net: secure_seq: Move net_secret_init() definition into
 CONFIG_IPV6 if block

On Sat, Oct 5, 2013 at 5:09 PM, Fabio Estevam <festevam@...il.com> wrote:
> From: Fabio Estevam <fabio.estevam@...escale.com>
>
> Commit 9a3bab6b05 (net: net_secret should not depend on TCP) introduced
> the following build warning when CONFIG_IPV6 is not selected:
>
> net/core/secure_seq.c:17:13: warning: 'net_secret_init' defined but not used [-Wunused-function]
>
> Fix it by moving net_secret_init(void) inside the '#if IS_ENABLED(CONFIG_IPV6)'
> block.
>
> Reported-by: Olof Johansson <olof@...om.net>
> Signed-off-by: Fabio Estevam <fabio.estevam@...escale.com>

Another solution would be:

--- a/net/core/secure_seq.c
+++ b/net/core/secure_seq.c
@@ -10,6 +10,7 @@

 #include <net/secure_seq.h>

+#if IS_ENABLED(CONFIG_IPV6)
 #define NET_SECRET_SIZE (MD5_MESSAGE_BYTES / 4)

 static u32 net_secret[NET_SECRET_SIZE] ____cacheline_aligned;
@@ -29,6 +30,7 @@ static void net_secret_init(void)
                cmpxchg(&net_secret[--i], 0, tmp);
        }
 }
+#endif

If this is preferred, I can send a v2 like that.
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