diff --git a/mm/Kconfig b/mm/Kconfig
index 71259e0..278e3ab 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -149,7 +149,18 @@
 	depends on NO_BOOTMEM
 	depends on X86_64
 	depends on NUMA
-	depends on BROKEN
+	default n
+	help
+	  Allow a node to have only movable memory.  Pages used by the kernel,
+	  such as direct mapping pages cannot be migrated.  So the corresponding
+	  memory device cannot be hotplugged.  This option allows users to
+	  online all the memory of a node as movable memory so that the whole
+	  node can be hotplugged.  Users who don't use the memory hotplug
+	  feature are fine with this option on since they don't online memory
+	  as movable.
+
+	  Say Y here if you want to hotplug a whole node.
+	  Say N here if you want kernel to use memory on all nodes evenly.
 
 # eventually, we can have this option just 'select SPARSEMEM'
 config MEMORY_HOTPLUG