module_usb_driver(usb_storage_driver);
宏展开如下：
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module_driver(__usb_driver, usb_register,
usb_deregister)
#define module_driver(__driver, __register, __unregister, ...)
static int __init __driver##_init(void)
{
return __register(&(__driver) , ##__VA_ARGS__);
}
module_init(__driver##_init);
static void __exit __driver##_exit(void)
{
__unregister(&(__driver) , ##__VA_ARGS__);
}
module_exit(__driver##_exit);
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所以等价于:
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static int __init (void)
{
return usb_register(&(usb_storage_driver));
}
module_init(usb_storage_driver_init);
static int __init usb_storage_driver_exit(void)
{
return usb_deregister(&(usb_storage_driver));
}
module_exit(usb_storage_driver_exit);
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usb_register
挂载在usb_bus_type上
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#define usb_register(driver)
usb_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
int usb_register_driver(struct usb_driver *new_driver, struct module *owner,
const char *mod_name)
{
new_driver->drvwrap.for_devices = 0;
new_driver->drvwrap.driver.bus = &usb_bus_type;
retval = driver_register(&new_driver->drvwrap.driver);
}
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