Re: devfs - why not ?

[Jamie Lokier]

Keith Owens wrote:
> >You mean like the PCI registered codes? Or Linux-specific ones?
> 
> MODULE_DEVICE_TABLE points at a struct <type>_device_id, currently he
> only defined type is pci.
> 
> struct pci_device_id {
> 	unsigned int vendor, device;		/* Vendor and device ID or PCI_ANY_ID */
> 	unsigned int subvendor, subdevice;	/* Subsystem ID's or PCI_ANY_ID */
> 	unsigned int class, class_mask;		/* (class,subclass,prog-if) triplet */
> 	unsigned long driver_data;		/* Data private to the driver */
> };
> 

An alternative is to use a string with wildcards.  You get no endless
duplication of PCI_ANY_ID, and you don't need new macros for
different buses or different patterns to match.

Also things like bus names from new drivers can be ignored by an older
kernel/modutils that doesn't understand them.

MODULE_DEVICE_SUPPORTED ("pci-11f1-2249-*-*-net-*", 0);
MODULE_DEVICE_SUPPORTED ("pci-11f1-224a-*-*-net-*", 0);
MODULE_DEVICE_SUPPORTED ("isapnp-114422334455667899fdeffefed-creative-*", 0);
		     
That's not exactly the right form, but gives the general idea.
Just a thought.

-- Jamie