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SubjectRe: [PATCH] arm64, pci, numa: Adding helper functions as required by pci
On Fri, Jan 08, 2016 at 12:01:31PM -0600, Bjorn Helgaas wrote:
> On Tue, Dec 22, 2015 at 04:08:50PM +0530, Ganapatrao Kulkarni wrote:
> > Adding helper functions and necessary code to make
> > pci driver(pci-host-generic) numa aware.
> >
> > This patch is on top of arm64-numa v7.
> > http://www.spinics.net/lists/arm-kernel/msg460813.html
> >
> > Signed-off-by: Ganapatrao Kulkarni <gkulkarni@caviumnetworks.com>
> > ---
> > arch/arm64/include/asm/numa.h | 8 +++++---
> > arch/arm64/kernel/pci.c | 8 ++++++++
> > drivers/pci/host/pci-host-generic.c | 1 +
> > 3 files changed, 14 insertions(+), 3 deletions(-)
> >
> > diff --git a/arch/arm64/include/asm/numa.h b/arch/arm64/include/asm/numa.h
> > index b8c2a3f..1eca4db 100644
> > --- a/arch/arm64/include/asm/numa.h
> > +++ b/arch/arm64/include/asm/numa.h
> > @@ -15,9 +15,11 @@
> > extern int __node_distance(int from, int to);
> > #define node_distance(a, b) __node_distance(a, b)
> >
> > -/* dummy definitions for pci functions */
> > -#define pcibus_to_node(node) 0
> > -#define cpumask_of_pcibus(bus) 0
> > +struct pci_bus;
> > +extern int pcibus_to_node(struct pci_bus *bus);
> > +#define cpumask_of_pcibus(bus) (pcibus_to_node(bus) == -1 ? \
> > + cpu_all_mask : \
> > + cpumask_of_node(pcibus_to_node(bus)))
>
> All the arch definitions of cpumask_of_pcibus() are pretty similar;
> could they be made more generic? At the very least, can you drop the
> definition here and use the one in include/asm-generic/topology.h,
> which is identical to what you're defining here?

+1 on that. I asked for exactly the same thing in my review of v7:

http://www.spinics.net/lists/arm-kernel/msg469592.html

but it looks like I was just ignored.

Will

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