#include <linux/moduleparam.h>
#include <net/pkt_sched.h>
#include <net/net_namespace.h>
+#include <linux/lockdep.h>
#define TX_TIMEOUT (2*HZ)
module_param(numifbs, int, 0);
MODULE_PARM_DESC(numifbs, "Number of ifb devices");
+/*
+ * dev_ifb->tx_queue.lock is usually taken after dev->rx_queue.lock,
+ * reversely to e.g. qdisc_lock_tree(). It should be safe until
+ * ifb doesn't take dev->tx_queue.lock with dev_ifb->rx_queue.lock.
+ * But lockdep should know that ifb has different locks from dev.
+ */
+static struct lock_class_key ifb_tx_queue_lock_key;
+static struct lock_class_key ifb_rx_queue_lock_key;
+
+
static int __init ifb_init_one(int index)
{
struct net_device *dev_ifb;
err = register_netdevice(dev_ifb);
if (err < 0)
goto err;
+
+ lockdep_set_class(&dev_ifb->tx_queue.lock, &ifb_tx_queue_lock_key);
+ lockdep_set_class(&dev_ifb->rx_queue.lock, &ifb_rx_queue_lock_key);
+
return 0;
err: