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linux-bus,device,driver,class
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struct bus_type {
const char * name;/*×ÜÏßÀàÐÍÃû³Æ*/
struct module * owner;/*Ö¸ÏòÄ£¿éµÄÖ¸Õë(Èç¹ûÓÐ), ´ËÄ£¿é¸ºÔð²Ù×÷Õâ¸ö×ÜÏß*/
struct kset subsys;/*ºÍ¸Ã×ÜÏßÏà¹ØµÄ×Óϵͳ*/
struct kset drivers;/*×ÜÏßÇý¶¯³ÌʽµÄkset*/
struct kset devices;/* ¹ÒÔÚ¸Ã×ÜÏßµÄËùÓÐÉ豸µÄkset*/
struct klist klist_devices;/*ºÍ¸Ã×ÜÏßÏà¹ØµÄÇý¶¯³ÌʽÁ´±í*/
struct klist klist_drivers;/*¹Ò½ÓÔÚ¸Ã×ÜÏßµÄÉ豸Á´±í*/
struct blocking_notifier_head bus_notifier;
struct bus_attribute * bus_attrs; /*×ÜÏßÊôÐÔ*/
struct device_attribute * dev_attrs; /*É豸ÊôÐÔ,Ö¸ÏòΪÿ¸ö¼ÓÈë×ÜÏßµÄÉ豸½¨Á¢µÄĬÈÏÊôÐÔÁ´±í*/
struct driver_attribute * drv_attrs; /*Çý¶¯³ÌʽÊôÐÔ*/
struct bus_attribute drivers_autoprobe_attr;/*Çý¶¯×Ô¶¯Ì½²âÊôÐÔ*/
struct bus_attribute drivers_probe_attr;/*Çý¶¯Ì½²âÊôÐÔ*/
int (*match)(struct device * dev, struct device_driver * drv);
int (*uevent)(struct device *dev, char **envp,
int num_envp, char *buffer, int buffer_size);
int (*probe)(struct device * dev);
int (*remove)(struct device * dev);
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