I have an old Thinkpad R32 2658 and I want to use dfu-util. The reference documentation starts with the following description:

To run dfu-util, you need to have /proc/bus/usb mounted and working. The terminal command "ls /proc/bus/usb" should return something similar to, "001 002 003 004 005 devices", it shouldn't be empty. If it is empty, use this command:
sudo mount -t usbfs usbfs /proc/bus/usb

The problem is: I don't have /proc/bus/usb at all. In /proc/bus there are only input and pci sub-directories. But I do have USB ports on my old notebook and my USB keys work well.

What can I do?