static intdevice_platform_notifystruct device dev enum kobject_action action int ret; ret = acpi_platform_notifydev action; if ret return ret; ret = software_node_notifydev action; if ret return ret

/定义一个函数，返回值为整型，参数为设备和kobject_action枚举类型的变量/ static int device_platform_notify(struct device *dev, enum kobject_action action) { /定义一个整型变量ret并初始化为0/ int ret;

/*调用acpi_platform_notify函数，传入设备和action参数，并将返回值赋值给ret*/
ret = acpi_platform_notify(dev, action);
/*如果ret不为0，则直接返回ret*/
if (ret)
    return ret;

/*调用software_node_notify函数，传入设备和action参数，并将返回值赋值给ret*/
ret = software_node_notify(dev, action);
/*如果ret不为0，则直接返回ret*/
if (ret)
    return ret;

/*如果platform_notify不为空且action为KOBJ_ADD，则调用platform_notify函数，传入设备参数*/
if (platform_notify && action == KOBJ_ADD)
    platform_notify(dev);
/*如果platform_notify_remove不为空且action为KOBJ_REMOVE，则调用platform_notify_remove函数，传入设备参数*/
else if (platform_notify_remove && action == KOBJ_REMOVE)
    platform_notify_remove(dev);
/*返回0*/
return 0;

}