original_kernel/arch/x86/pci/Makefile_64

#
# Makefile for X86_64 specific PCI routines
#
# Reuse the i386 PCI subsystem
#
EXTRA_CFLAGS += -Iarch/x86/pci

obj-y		:= i386.o
obj-$(CONFIG_PCI_DIRECT)+= direct.o
obj-y		+= fixup.o init.o
obj-$(CONFIG_ACPI)	+= acpi.o
obj-y			+= legacy.o irq.o common.o early.o
# mmconfig has a 64bit special
obj-$(CONFIG_PCI_MMCONFIG) += mmconfig_64.o direct.o mmconfig-shared.o

obj-y		+= k8-bus_64.o