[openib-general] device classes

[Roland Dreier]

Today we decided that upper-layer protocols like IPoIB should be
classes (in the <linux/device.h> sense of the word ;).  However, as I
start to try and figure things out, I don't see how a class gets
hotplug-type notifications when devices appear or disappear.

Am I missing something, or does the IB core have to implement
something where classes like IPoIB register with the core, and then
the core creates class_device instances for every registered class
when devices are added?

 - R.