Re: [PATCH] PCI: Add pci_assign_resource_fixed -- allow fixed address assignments

[Kumar Gala <galak@kernel.crashing.org>]

On Apr 27, 2006, at 5:34 PM, Andrew Morton wrote:

> Kumar Gala <galak@kernel.crashing.org> wrote:
>>
>> On some embedded systems the PCI address for hotplug devices are  
>> not only
>> known a priori but are required to be at a given PCI address for  
>> other
>> master in the system to be able to access.
>>
>> An example of such a system would be an FPGA which is setup from  
>> user space
>> after the system has booted.  The FPGA may be access by DSPs in  
>> the system
>> and those DSPs expect the FPGA at a fixed PCI address.
>>
>> Added pci_assign_resource_fixed() as a way to allow assignment of  
>> the PCI
>> devices's BARs at fixed PCI addresses.
>
> Is there any sane way in which we can arrange for this function to  
> not be
> present in vmlinux's which don't need it?
>
> Options would be
>
> a) Put it in a .a file.
>
>    - messy from a source perspective
>
>    - doesn't work if the only reference is from a module
>
>    - small gains anyway.
>
> b) Use CONFIG_EMBEDDED.

I'm fine with wrapping it in a CONFIG_EMBEDDED, Greg?

- k