[PATCH v4 04/19] PCI/MSI: Add hooks to populate the msi_domain field

[Bjorn Helgaas]

On Wed, Jul 15, 2015 at 01:16:38PM +0100, Marc Zyngier wrote:
> In order to be able to populate the device msi_domain field,
> add the necesary hooks to propagate the host bridge msi_domain
> across secondary busses to devices.
> 
> So far, nobody populates the initial msi_domain.
> 
> Signed-off-by: Marc Zyngier <marc.zyngier at arm.com>
> ---
>  drivers/pci/probe.c | 30 ++++++++++++++++++++++++++++++
>  include/linux/pci.h |  1 +
>  2 files changed, 31 insertions(+)
> 
> diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
> index cefd636..376f6fa 100644
> --- a/drivers/pci/probe.c
> +++ b/drivers/pci/probe.c
> @@ -661,6 +661,20 @@ static void pci_set_bus_speed(struct pci_bus *bus)
>  	}
>  }
>  
> +void __weak pcibios_set_host_bridge_msi_domain(struct pci_bus *bus)
> +{
> +}

I don't think there's anything in this series that requires this to be a
weak function, is there?  This is the only definition I see.