Linux Kernel input设备之handler注册

/**

 * input_register_handler - register a new input handler * @handler: handler to be registered * * This function registers a new input handler (interface) for input * devices in the system and attaches it to all input devices that * are compatible with the handler. */int input_register_handler(struct input_handler *handler){struct input_dev *dev;int error;error = mutex_lock_interruptible(&input_mutex);if (error)return error;INIT_LIST_HEAD(&handler->h_list);list_add_tail(&handler->node, &input_handler_list);list_for_each_entry(dev, &input_dev_list, node)input_attach_handler(dev, handler);input_wakeup_procfs_readers();mutex_unlock(&input_mutex);return 0;}