drivers/gpu/drm/vgem/Makefile - third_party/linux - Git at Google

 vgem-y := vgem_drv.o vgem_fence.o

 obj-$(CONFIG_DRM_VGEM)	+= vgem.o
	vgem-y := vgem_drv.o vgem_fence.o

	obj-$(CONFIG_DRM_VGEM) += vgem.o