netdev - Re: [PATCH] tipc: fix build issue when building without IPv6

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Date:	Thu, 19 Mar 2015 15:04:33 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	marcelo.leitner@...il.com
Cc:	richard.alpe@...csson.com, jon.maloy@...csson.com,
	ying.xue@...driver.com, netdev@...r.kernel.org,
	tipc-discussion@...ts.sourceforge.net, erik.hugne@...csson.com
Subject: Re: [PATCH] tipc: fix build issue when building without IPv6

From: Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
Date: Thu, 19 Mar 2015 12:13:43 -0300

> @@ -387,6 +391,11 @@ static int tipc_udp_enable(struct net *net, struct tipc_bearer *b,
>  	tuncfg.encap_destroy = NULL;
>  	setup_udp_tunnel_sock(net, ub->ubsock, &tuncfg);
>  
> +	/* At this point, IPv6 module should have been loaded in
> +	 * udp_sock_create/sock_create_kern().
> +	 */
> +	BUG_ON(!ipv6_stub);
> +

If IPV6=n this will be NULL no matter what.

And if the module load gets an error, this will be NULL as well.
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