netfilter: nftables: add helper function to release one table

Add a function to release one table.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

net/netfilter/nf_tables_api.c

@@ -8999,10 +8999,9 @@ static void __nft_release_hooks(struct net *net)
 	}
 }
 
-static void __nft_release_tables(struct net *net)
+static void __nft_release_table(struct net *net, struct nft_table *table)
 {
 	struct nft_flowtable *flowtable, *nf;
-	struct nft_table *table, *nt;
 	struct nft_chain *chain, *nc;
 	struct nft_object *obj, *ne;
 	struct nft_rule *rule, *nr;
@@ -9012,7 +9011,6 @@ static void __nft_release_tables(struct net *net)
 		.family	= NFPROTO_NETDEV,
 	};
 
-	list_for_each_entry_safe(table, nt, &net->nft.tables, list) {
 	ctx.family = table->family;
 	ctx.table = table;
 	list_for_each_entry(chain, &table->chains, list) {
@@ -9046,7 +9044,14 @@ static void __nft_release_tables(struct net *net)
 	}
 	list_del(&table->list);
 	nf_tables_table_destroy(&ctx);
-	}
+}
+
+static void __nft_release_tables(struct net *net)
+{
+	struct nft_table *table, *nt;
+
+	list_for_each_entry_safe(table, nt, &net->nft.tables, list)
+		__nft_release_table(net, table);
 }
 
 static int __net_init nf_tables_init_net(struct net *net)