[PATCH 11/13] vfio/mdev: consolidate all the available_instance sysfs into the core code

[Tian, Kevin]

> From: Christoph Hellwig
> Sent: Tuesday, June 14, 2022 12:54 PM
> 
> Every driver just print a number, simply add a method to the mdev_driver
> to return it and provide a standard sysfs show function.

I didn't get why not simply adding a field to mdev_type?