diff --git a/arch/metag/mm/Kconfig b/arch/metag/mm/Kconfig
index 975f2f4e3ecf..ccf2576786ee 100644
--- a/arch/metag/mm/Kconfig
+++ b/arch/metag/mm/Kconfig
@@ -93,11 +93,6 @@ config ARCH_SPARSEMEM_ENABLE
 config ARCH_SPARSEMEM_DEFAULT
 	def_bool y
 
-config MAX_ACTIVE_REGIONS
-	int
-	default "2" if SPARSEMEM
-	default "1"
-
 config ARCH_POPULATES_NODE_MAP
 	def_bool y
 
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index bdac46e3fc4e..a9ae67317374 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -428,11 +428,6 @@ config NODES_SHIFT
 	default "4"
 	depends on NEED_MULTIPLE_NODES
 
-config MAX_ACTIVE_REGIONS
-	int
-	default "256" if PPC64
-	default "32"
-
 config ARCH_SELECT_MEMORY_MODEL
 	def_bool y
 	depends on PPC64
diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig
index 5a43a871e097..dba285e86808 100644
--- a/arch/sh/mm/Kconfig
+++ b/arch/sh/mm/Kconfig
@@ -137,13 +137,6 @@ config ARCH_SPARSEMEM_ENABLE
 config ARCH_SPARSEMEM_DEFAULT
 	def_bool y
 
-config MAX_ACTIVE_REGIONS
-	int
-	default "6" if (CPU_SUBTYPE_SHX3 && SPARSEMEM)
-	default "2" if SPARSEMEM && (CPU_SUBTYPE_SH7722 || \
-		       CPU_SUBTYPE_SH7785)
-	default "1"
-
 config ARCH_SELECT_MEMORY_MODEL
 	def_bool y