drivers/amba/Makefile - third_party/linux - Git at Google

 obj-$(CONFIG_ARM_AMBA)		+= bus.o
 obj-$(CONFIG_TEGRA_AHB)		+= tegra-ahb.o
	obj-$(CONFIG_ARM_AMBA) += bus.o
	obj-$(CONFIG_TEGRA_AHB) += tegra-ahb.o