On Wed, Jun 10, 2020 at 04:58:44AM +0000, Zhang, Qiang wrote: > cdev object reference count and "struct printer_dev" object > reference count(kref), This two reference counts do not conflict. in > file usb-skeleton.c also used a similar method， "struct usb_skel" > contains kref members. I do not understand what you are referring to here, sorry. greg k-h
