On 02/23/2016 02:26 AM, Will Deacon wrote:

On Mon, Feb 22, 2016 at 05:58:22PM -0800, David Daney wrote:

quoted

From: Ganapatrao Kulkarni <redacted>

Attempt to get the memory and CPU NUMA node via of_numa.  If that
fails, default the dummy NUMA node and map all memory and CPUs to node
0.

Tested-by: Shannon Zhao <redacted>
Reviewed-by: Robert Richter <rrichter-YGCgFSpz5w/QT0dZR+AlfA@public.gmane.org>
Signed-off-by: Ganapatrao Kulkarni <redacted>
Signed-off-by: David Daney <david.daney-YGCgFSpz5w/QT0dZR+AlfA@public.gmane.org>
---
  arch/arm64/Kconfig                |  26 +++
  arch/arm64/include/asm/mmzone.h   |  12 ++
  arch/arm64/include/asm/numa.h     |  45 +++++
  arch/arm64/include/asm/topology.h |  10 +
  arch/arm64/kernel/pci.c           |  10 +
  arch/arm64/kernel/setup.c         |   4 +
  arch/arm64/kernel/smp.c           |   4 +
  arch/arm64/mm/Makefile            |   1 +
  arch/arm64/mm/init.c              |  34 +++-
  arch/arm64/mm/mmu.c               |   1 +
  arch/arm64/mm/numa.c              | 403 ++++++++++++++++++++++++++++++++++++++
  11 files changed, 545 insertions(+), 5 deletions(-)
  create mode 100644 arch/arm64/include/asm/mmzone.h
  create mode 100644 arch/arm64/include/asm/numa.h
  create mode 100644 arch/arm64/mm/numa.c

[...]

quoted

diff --git a/arch/arm64/include/asm/mmzone.h b/arch/arm64/include/asm/mmzone.h
new file mode 100644
index 0000000..a0de9e6
--- /dev/null
+++ b/arch/arm64/include/asm/mmzone.h

@@ -0,0 +1,12 @@
+#ifndef __ASM_MMZONE_H
+#define __ASM_MMZONE_H
+
+#ifdef CONFIG_NUMA
+
+#include <asm/numa.h>
+
+extern struct pglist_data *node_data[];
+#define NODE_DATA(nid)		(node_data[(nid)])
+
+#endif /* CONFIG_NUMA */
+#endif /* __ASM_MMZONE_H */

What happened to the patch cleaning this up in generic code?

As per 0/5 :

    v11:
	- Dropped cleanup patches for other architectures, they will be
           submitted as a separate set after more testing.

The "cleanup patches" were not building on x86, which is a bit of a
problem.  I believe I have corrected that issue, but would like to do
a little more build testing on all the other architectures that are
effected.

I probably should have supplied more detail as to my plan of attack
for these.  To make review more manageable, I would like to consider
the arm64 patches separately.  The parties interested in getting arm64
NUMA working can proceed without waiting for the cleanups to be fully
tested and acknowledged.  I am working on testing the cleanups on each
architecture touched, and will resubmit them as a separate patch set
this week.  I think splitting them like this will streamline the
process of getting to the eventual goal of having both arm64 NUMA and
the cleanups merged.

David.
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