Re: [PATCH] PCI: Add pci_assign_resource_fixed -- allow fixedaddress assignments

[Andrew Morton]

Kumar Gala <galak@xxxxxxxxxxxxxxxxxxx> 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.

?
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