[NETFILTER]: x_tables: move table->lock initialization

xt_table->lock should be initialized before xt_replace_table() call, which
uses it. This patch removes strict requirement that table should define
lock before registering.

Signed-off-by: Dmitry Mishin <dim@openvz.org>
Signed-off-by: Kirill Korotaev <dev@openvz.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/netfilter/x_tables.c

@@ -529,6 +529,7 @@ int xt_register_table(struct xt_table *table,
 
 	/* Simplifies replace_table code. */
 	table->private = bootstrap;
+	rwlock_init(&table->lock);
 	if (!xt_replace_table(table, 0, newinfo, &ret))
 		goto unlock;
 
@@ -538,7 +539,6 @@ int xt_register_table(struct xt_table *table,
 	/* save number of initial entries */
 	private->initial_entries = private->number;
 
-	rwlock_init(&table->lock);
 	list_prepend(&xt[table->af].tables, table);
 
 	ret = 0;