At the time of registration mixed character device driver, it was registered in register_chrdev way of device drivers, it will be the number of times device number mixed character device has written died, in 256, why is the kernel used in misc_register to represent a 64 - bit bitmap has registered a mixed character device, so that not only have 64 mixed character device? But you
Cat/proc/misc can see some mixed character device in the device number more than 64, this is what happened? Hope to have a great god can,,,,