Re: [PATCH] x86[-64] PCI domain support

From: Muli Ben-Yehuda
Date: Sat Sep 30 2006 - 06:43:10 EST

On Sat, Sep 30, 2006 at 06:03:11AM -0400, Jeff Garzik wrote:

> Would you also make sure that Andrew has the necessary bits to keep
> Calgary going under PCI domains? If it's a patch that sits on top of
> linux-2.6.git + my patch, I can merge it into misc-2.6.git#pciseg (which
> automatically goes into -mm). Otherwise, make sure -mm has the stack of
> patches necessary.

The patch I posted earlier is all that's needed, if you could merge it
into #pciseg that would be fine. I'm pondering making one small
change though: in your pci domains patch, you have this snippet:

+static inline int pci_domain_nr(struct pci_bus *bus)
+ struct pci_sysdata *sd = bus->sysdata;
+ return sd->domain;
+static inline int pci_proc_domain(struct pci_bus *bus)
+ return pci_domain_nr(bus);
+#endif /* CONFIG_PCI_DOMAINS */

So pci_domain_nr and pci_proc_domain are only available if
CONFIG_PCI_DOMAINS is defined. I followed suit and make pci_iommu only
available if CONFIG_CALGARY_IOMMU is defined, but perhaps it would be
better to make it unconditional, since ->sysdata will always be
available anyway. Was there a specific reason why pci_domain_nr is
only available if CONFIG_PCI_DOMAINS?

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