If in doubt, say Y here.
+config HOTPLUG_CPU
+ bool "Support for enabling/disabling CPUs"
+ depends on SMP && HOTPLUG && EXPERIMENTAL && PPC_PMAC
+ ---help---
+ Say Y here to be able to disable and re-enable individual
+ CPUs at runtime on SMP machines.
+
+ Say N if you are unsure.
+
source arch/ppc/platforms/4xx/Kconfig
source arch/ppc/platforms/85xx/Kconfig