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>
diff --git a/include/linux/of.h b/include/linux/of.h
index 1012377..76930ee 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -21,6 +21,7 @@
#include <linux/kref.h>
#include <linux/mod_devicetable.h>
#include <linux/spinlock.h>
+#include <linux/topology.h>
#include <asm/byteorder.h>
#include <asm/errno.h>
@@ -158,11 +159,6 @@
#define OF_BAD_ADDR ((u64)-1)
-#ifndef of_node_to_nid
-static inline int of_node_to_nid(struct device_node *np) { return -1; }
-#define of_node_to_nid of_node_to_nid
-#endif
-
static inline const char* of_node_full_name(struct device_node *np)
{
return np ? np->full_name : "<no-node>";
@@ -412,6 +408,15 @@
while (0)
#endif /* CONFIG_OF */
+#ifndef of_node_to_nid
+static inline int of_node_to_nid(struct device_node *np)
+{
+ return numa_node_id();
+}
+
+#define of_node_to_nid of_node_to_nid
+#endif
+
/**
* of_property_read_bool - Findfrom a property
* @np: device node from which the property value is to be read.