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/**

 * input_allocate_device - allocate memory for new input device * * Returns prepared struct input_dev or %NULL. * * NOTE: Use input_free_device() to free devices that have not been * registered; input_unregister_device() should be used for already * registered devices. */struct input_dev *input_allocate_device(void){	static atomic_t input_no = ATOMIC_INIT(-1);	struct input_dev *dev;	dev = kzalloc(sizeof(struct input_dev), GFP_KERNEL);	if (dev) {		dev->dev.type = &input_dev_type;		dev->dev.class = &input_class;		device_initialize(&dev->dev);		mutex_init(&dev->mutex);		spin_lock_init(&dev->event_lock);		init_timer(&dev->timer);		INIT_LIST_HEAD(&dev->h_list);		INIT_LIST_HEAD(&dev->node);		dev_set_name(&dev->dev, "input%lu",			     (unsigned long)atomic_inc_return(&input_no));		__module_get(THIS_MODULE);	}	return dev;}

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