netfilter: ipt_CLUSTERIP: use clusterip_net to store pernet warning

No need to use struct net for this.
Signed-off-by: NFlorian Westphal <fw@strlen.de>
Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>

net/ipv4/netfilter/ipt_CLUSTERIP.c

@@ -66,6 +66,7 @@ struct clusterip_net {
 	/* lock protects the configs list */
 	spinlock_t lock;
 
+	bool clusterip_deprecated_warning;
 #ifdef CONFIG_PROC_FS
 	struct proc_dir_entry *procdir;
 	/* mutex protects the config->pde*/
@@ -544,10 +545,10 @@ static int clusterip_tg_check(const struct xt_tgchk_param *par)
 
 	cn->hook_users++;
 
-	if (!par->net->xt.clusterip_deprecated_warning) {
+	if (!cn->clusterip_deprecated_warning) {
 		pr_info("ipt_CLUSTERIP is deprecated and it will removed soon, "
 			"use xt_cluster instead\n");
-		par->net->xt.clusterip_deprecated_warning = true;
+		cn->clusterip_deprecated_warning = true;
 	}
 
 	cipinfo->config = config;