Note - this is just an RFC patch, do not apply.  It compiles, but is not
tested.

Attached is a patch against 2.4.0-test10 which updates the kernel's
hotplug capabilities per recent discussions (both public and private).

Major changes:
* pci: Execute /sbin/hotplug for each hotplug device insertion or
removal
* net: Export network device hardware info to userspace as
/proc/net/if/$IF/businfo
* net: Execute /sbin/network for each net device register/unregister

Minor changes:
* kbuild: CONFIG_HOTPLUG now requires CONFIG_KMOD
* epic100: demonstration of how a net device exports its bus info
* procfs: add standard method of exporting bus info to userspace. 
Currently ISA, PCI, and SBUS are supported.
* pci: support businfo
* sparc: support businfo
* usb: update /sbin/hotplug execution to pass event type (verb) as
standardized cmd line arg

DaveM - netdevice.h seems like the best place to include businfo.h. 
Since it doesn't include anything but linux/types.h, that should
eliminate any worry about a nightmare of nested includes...

Note - the patch to include/linux/pci.h will go away, that is a remnant
of an earlier change.  But it is included as you may need it to compile.

-- 
Jeff Garzik             | "Mind if I drive?"  -Sam
Building 1024           | "Not if you don't mind me clawing at the
MandrakeSoft            |  dash and shrieking like a cheerleader."
                        |                     -Max