Allow architectures to opt-in to the adaptive affinity NUMA balancing code.

Cc: Peter Zijlstra <redacted>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andrea Arcangeli <redacted>
Cc: Rik van Riel <redacted>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Thomas Gleixner <redacted>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 init/Kconfig | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/init/Kconfig b/init/Kconfig
index b8a4a58..cf3e79c 100644
--- a/init/Kconfig
+++ b/init/Kconfig

@@ -725,6 +725,13 @@ config ARCH_USES_NUMA_GENERIC_PGPROT_HUGEPAGE
 config ARCH_WANTS_NUMA_VARIABLE_LOCALITY
 	bool
 
+#
+# For architectures that want to enable the PROT_NONE driven,
+# NUMA-affine scheduler balancing logic:
+#
+config ARCH_SUPPORTS_NUMA_BALANCING
+	bool
+
 menuconfig CGROUPS
 	boolean "Control Group support"
 	depends on EVENTFD

-- 
1.7.11.7

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