VGA Arbiter

[Benjamin Herrenschmidt]

Ok, I had a look at my old code and I'm wondering how it works as a
module since you need to have the PCI code call

vga_arbiter_add_pci_device()

and

vga_arbiter_del_pci_device()

For it to register VGA devices.

Now, the good news is that I recently added to the generic device core a
notifier to be notified of devices being added/removed (and drivers
being bound/unbound as well) for a given bus type.

Look at bus_{un}register_notifier() in linux/device.h

You can register a notifier on pci_bus_type, and react to the messages
BUS_NOTIFY_ADD_DEVICE and BUS_NOTIFY_DEL_DEVICE. You can then cast the
struct device * argument to a pci device with to_pci_dev()

Ben.