跆拳道礼仪:驱动的初始化

来源：百度文库编辑：九乡新闻网时间：2024/04/28 21:56:12

start_kernel()->rest_init()->kernel_init()->do_basic_setup()->driver_init()－＞
                                                                                             －＞do_initcalls();

/**
* driver_init - initialize driver model.
*
* Call the driver model init functions to initialize their
* subsystems. Called early from init/main.c.
*/
void __init driver_init(void)
{
    /* These are the core pieces */
    devtmpfs_init();
    devices_init();
    buses_init();
    classes_init();
    firmware_init();
    hypervisor_init();

    /* These are also core pieces, but must come after the
    * core core pieces.
    */
    platform_bus_init();
    system_bus_init();
    cpu_dev_init();
    memory_dev_init();
}
＊＊＊＊＊＊＊＊＊＊＊
int __init devices_init(void)
{
    devices_kset = kset_create_and_add("devices", &device_uevent_ops, NULL);
    if (!devices_kset)
        return -ENOMEM;
    dev_kobj = kobject_create_and_add("dev", NULL);
    if (!dev_kobj)
        goto dev_kobj_err;
    sysfs_dev_block_kobj = kobject_create_and_add("block", dev_kobj);
    if (!sysfs_dev_block_kobj)
        goto block_kobj_err;
    sysfs_dev_char_kobj = kobject_create_and_add("char", dev_kobj);
    if (!sysfs_dev_char_kobj)
        goto char_kobj_err;

    return 0;

char_kobj_err:
    kobject_put(sysfs_dev_block_kobj);
block_kobj_err:
    kobject_put(dev_kobj);
dev_kobj_err:
    kset_unregister(devices_kset);
    return -ENOMEM;
}

tatic const struct kset_uevent_ops device_uevent_ops = {
    .filter =    dev_uevent_filter,
    .name =        dev_uevent_name,
    .uevent =    dev_uevent,
};

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