linux-imx

/*

 * net/switchdev/switchdev.c - Switch device API

 * Copyright (c) 2014-2015 Jiri Pirko <jiri@resnulli.us>

 * Copyright (c) 2014-2015 Scott Feldman <sfeldma@gmail.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 */

​

#include <linux/kernel.h>

#include <linux/types.h>

#include <linux/init.h>

#include <linux/mutex.h>

#include <linux/notifier.h>

#include <linux/netdevice.h>

#include <linux/etherdevice.h>

#include <linux/if_bridge.h>

#include <linux/list.h>

#include <linux/workqueue.h>

#include <linux/if_vlan.h>

#include <linux/rtnetlink.h>

#include <net/switchdev.h>

​

static LIST_HEAD(deferred);

static DEFINE_SPINLOCK(deferred_lock);

​

typedef void switchdev_deferred_func_t(struct net_device *dev,

                       const void *data);

​

struct switchdev_deferred_item {

    struct list_head list;

    struct net_device *dev;

    switchdev_deferred_func_t *func;

    unsigned long data[0];

};

​

static struct switchdev_deferred_item *switchdev_deferred_dequeue(void)

{

    struct switchdev_deferred_item *dfitem;

​

    spin_lock_bh(&deferred_lock);

    if (list_empty(&deferred)) {

        dfitem = NULL;

        goto unlock;

    }

    dfitem = list_first_entry(&deferred,

                  struct switchdev_deferred_item, list);

    list_del(&dfitem->list);

unlock:

    spin_unlock_bh(&deferred_lock);

    return dfitem;

}

​

/**

 *  switchdev_deferred_process - Process ops in deferred queue

 *

 *  Called to flush the ops currently queued in deferred ops queue.

 *  rtnl_lock must be held.

 */

void switchdev_deferred_process(void)

{