[PATCH 23/31] sched, numa, mm, arch: Add variable locality exception

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From: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>

Some architectures (ab)use NUMA to represent different memory
regions all cpu-local but of different latencies, such as SuperH.

The naming comes from Mel Gorman.

Named-by: Mel Gorman <mgorman@xxxxxxx>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 arch/sh/mm/Kconfig | 1 +
 init/Kconfig       | 7 +++++++
 2 files changed, 8 insertions(+)

diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig
index cb8f992..0f7c852 100644
--- a/arch/sh/mm/Kconfig
+++ b/arch/sh/mm/Kconfig
@@ -111,6 +111,7 @@ config VSYSCALL
 config NUMA
 	bool "Non Uniform Memory Access (NUMA) Support"
 	depends on MMU && SYS_SUPPORTS_NUMA && EXPERIMENTAL
+	select ARCH_WANT_NUMA_VARIABLE_LOCALITY
 	default n
 	help
 	  Some SH systems have many various memories scattered around
diff --git a/init/Kconfig b/init/Kconfig
index 6fdd6e3..ae412fd 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -696,6 +696,13 @@ config LOG_BUF_SHIFT
 config HAVE_UNSTABLE_SCHED_CLOCK
 	bool
 
+#
+# For architectures that (ab)use NUMA to represent different memory regions
+# all cpu-local but of different latencies, such as SuperH.
+#
+config ARCH_WANT_NUMA_VARIABLE_LOCALITY
+	bool
+
 menuconfig CGROUPS
 	boolean "Control Group support"
 	depends on EVENTFD
-- 
1.7.11.7

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