On Tue, Jul 8, 2014 at 4:46 AM, Liviu Dudau [off-list ref] wrote:

On Tue, Jul 08, 2014 at 01:59:54AM +0100, Bjorn Helgaas wrote:

quoted

I wonder if it would help to make a weak pci_domain_nr() function that
returns "bridge->domain_nr".  Then each arch could individually drop its
pci_domain_nr() definition as it was converted, e.g., something like this:

  - Convert every arch pci_domain_nr() from a #define to a non-inline
    function
  - Add bridge.domain_nr, initialized from pci_domain_nr()
  - Add a weak generic pci_domain_nr() that returns bridge.domain_nr
  - Add a way to create a host bridge in a specified domain, so we can
    initialize bridge.domain_nr without using pci_domain_nr()
  - Convert each arch to use the new creation mechanism and drop its
    pci_domain_nr() implementation

I will try to propose a patch implementing this.

I think this is more of an extra credit, cleanup sort of thing.  I
don't think it advances your primary goal of (I think) getting arm64
PCI support in.  So my advice is to not worry about unifying domain
handling until later.

Bjorn