From: Paul Mundt <lethal@linux-sh.org>
Date: Mon, 4 Jun 2012 05:04:34 +0000 (-0700)
Subject: irqdomain: Simple NUMA awareness.
X-Git-Tag: v3.6-rc1~23^2~13
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5ca4db61e859526b2dbee3bcea3626d3de49a0b2;p=pandora-kernel.git

irqdomain: Simple NUMA awareness.

While common irqdesc allocation is node aware, the irqdomain code is not.

Presently we observe a number of regressions/inconsistencies on
NUMA-capable platforms:

- Platforms using irqdomains with legacy mappings, where the
  irq_descs are allocated node-local and the irqdomain data
  structure is not.

- Drivers implementing irqdomains will lose node locality
  regardless of the underlying struct device's node id.

This plugs in NUMA node id proliferation across the various allocation
callsites by way of_node_to_nid() node lookup. While of_node_to_nid()
does the right thing for OF-capable platforms it doesn't presently handle
the non-DT case. This is trivially dealt with by simply wraping in to
numa_node_id() unconditionally.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
---

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