--- arch/arm/kernel/Makefile

+++ arch/arm/kernel/Makefile

@@ -62,6 +62,7 @@ obj-$(CONFIG_IWMMXT) += iwmmxt.o

obj-$(CONFIG_CPU_HAS_PMU) += pmu.o

obj-$(CONFIG_HW_PERF_EVENTS) += perf_event.o

AFLAGS_iwmmxt.o := -Wa,-mcpu=iwmmxt

+obj-$(CONFIG_ARM_CPU_TOPOLOGY) += topology.o

ifneq ($(CONFIG_ARCH_EBSA110),y)

obj-y += io.o