> Hello,
>
> [this patch series touches a few subsystems; hopefully I got all
> the right maintainers]
>
> Recently, Matthew Wilcox sent out the following mail about PCI
> slots:
>
>
http://marc.info/?l=linux-pci&m=119432330418980&w=2
>
> The following patch series is a rough first cut at implementing
> the ideas he outlined, namely, that PCI slots are physical
> objects that we care about, independent of their hotplug
> capabilities.
>
> We introduce a struct pci_slot as a first-class citizen, and turn
> hotplug_slot into a subsidiary structure. A brief glimpse at the
> potential for cleanup is given, as we modify the existing hotplug
> drivers and remove the multiple get_address() methods. Certainly
> more cleanup can be done with this new structure.
>
> Additionally, we introduce an ACPI PCI slot driver, which will
> detect all physical PCI slots in the system (as described by
> ACPI). De-coupling the notion of a physical slot from its hotplug
> capability allows users to understand the physical geography of
> their machines, whether their slots are hotpluggable or not.
>
> This patch series builds heavily on Willy's prior work (with a
> bit of the typical refresh needed when aiming at the moving
> target of the kernel). The ACPI PCI slot driver is new.
>
> I have tested this series on both ia64 (hp rx6600) and x86 (hp
> dl380g). On ia64, system firmware provides _SUN methods for the
> PCI slots and we get entries in /sys/bus/pci/slots/. On my x86
> machine, firmware didn't seem to provide a _SUN, so we don't get
> any entries in /sys/bus/pci/slots/, but nothing really bad
> happens either. ;)
>
> Comments/feedback are appreciated.
>
> Thanks.
>
> /ac
>
>
>
