unsigned int state_in_sysfs:1;如何解释其中的:1是赋值吗?

这是内核的kobject结构体中的定义。
struct kobject {
const char *name;
struct list_head entry;
struct kobject *parent;
struct kset *kset;
struct kobj_type *ktype;
struct sysfs_dirent *sd;
struct kref kref;
unsigned int state_initialized:1;
unsigned int state_in_sysfs:1;
unsigned int state_add_uevent_sent:1;
unsigned int state_remove_uevent_sent:1;
};

占用1个字节.

好像不对！
应该是bit,不是byte

查一下位段的用法吧。