arm64: Kconfig: support for nodes spanning other nodes

[Janghyuck Kim]

To support NUMA systems whose physical address layout is not continuous
on one node, nodes spanning other nodes feature is required.

Signed-off-by: Janghyuck Kim <janghyuck.kim@xxxxxxxxxxx>
---
 arch/arm64/Kconfig | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 49b8d017cba6..18ff7ce9dd60 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -1004,6 +1004,14 @@ config NEED_PER_CPU_EMBED_FIRST_CHUNK
 config HOLES_IN_ZONE
 	def_bool y
 
+# Some NUMA nodes have memory ranges that span
+# other nodes.  Even though a pfn is valid and
+# between a node's start and end pfns, it may not
+# reside on that node.  See memmap_init_zone()
+# for details.
+config NODES_SPAN_OTHER_NODES
+	depends on NUMA
+
 source "kernel/Kconfig.hz"
 
 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
-- 
2.28.0