drivers/dax/Makefile - third_party/kernel - Git at Google

 # SPDX-License-Identifier: GPL-2.0
 obj-$(CONFIG_DAX) += dax.o
 obj-$(CONFIG_DEV_DAX) += device_dax.o
 obj-$(CONFIG_DEV_DAX_KMEM) += kmem.o

 dax-y := super.o
 dax-y += bus.o
 device_dax-y := device.o

 obj-y += pmem/
	# SPDX-License-Identifier: GPL-2.0
	obj-$(CONFIG_DAX) += dax.o
	obj-$(CONFIG_DEV_DAX) += device_dax.o
	obj-$(CONFIG_DEV_DAX_KMEM) += kmem.o

	dax-y := super.o
	dax-y += bus.o
	device_dax-y := device.o

	obj-y += pmem/