Linux内核常用API设备模型中sysfs相关代码是什么？

kset = kset_create_and_add(“kset”, NULL, NULL) 创建keset父节点
kobj1 = kobject_create_and_add(“kobj1”, kset->kobj) 在kset下创建子节点
static ssize_t val_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
static ssize_t val_store(struct kobject *kobj, struct kobj_attribute *attr, const char *buf, size_t count)
static struct kobj_attribute kobj1_val_attr = __ATTR(val, 0666, val_show, val_store)
static struct attribut *kobj1_attrs[] = {undefined
&kobj1_val_attr.attr,
NULL,
}
static struct attribut_group kobj1_attr_group = {undefined
.attrs = kobj1_attrs,
}
sysfs_create_group(kobj1, &kobj1_attr_group) 为kboj创建属性
sysfs_create_link(kobj2, kobj1, “kobj1”) 创建软连接