1. 根目录:
2. arch
3. x86
4. kernel
5. Makefile

#
# Makefile for the linux kernel.
#

extra-y                := head_$(BITS).o head$(BITS).o head.o vmlinux.lds

CPPFLAGS_vmlinux.lds += -U$(UTS_MACHINE)

ifdef CONFIG_FUNCTION_TRACER
# Do not profile debug and lowlevel utilities
CFLAGS_REMOVE_tsc.o = -pg
CFLAGS_REMOVE_paravirt-spinlocks.o = -pg
CFLAGS_REMOVE_pvclock.o = -pg
CFLAGS_REMOVE_kvmclock.o = -pg
CFLAGS_REMOVE_ftrace.o = -pg
CFLAGS_REMOVE_early_printk.o = -pg
endif

CFLAGS_irq.o := -I$(src)/../include/asm/trace

obj-y			:= process_$(BITS).o signal.o entry_$(BITS).o
obj-y			+= traps.o irq.o irq_$(BITS).o dumpstack_$(BITS).o
obj-y			+= time.o ioport.o ldt.o dumpstack.o nmi.o
obj-y			+= setup.o x86_init.o i8259.o irqinit.o jump_label.o
obj-$(CONFIG_IRQ_WORK)  += irq_work.o
obj-y			+= probe_roms.o
obj-$(CONFIG_X86_32)	+= i386_ksyms_32.o
obj-$(CONFIG_X86_64)	+= sys_x86_64.o x8664_ksyms_64.o
obj-$(CONFIG_X86_64)	+= mcount_64.o
obj-y			+= syscall_$(BITS).o vsyscall_gtod.o
obj-$(CONFIG_X86_64)	+= vsyscall_64.o
obj-$(CONFIG_X86_64)	+= vsyscall_emu_64.o
obj-$(CONFIG_X86_ESPFIX64)	+= espfix_64.o
obj-$(CONFIG_SYSFS)	+= ksysfs.o
obj-y			+= bootflag.o e820.o
obj-y			+= pci-dma.o quirks.o topology.o kdebugfs.o
obj-y			+= alternative.o i8253.o pci-nommu.o hw_breakpoint.o
obj-y			+= tsc.o tsc_msr.o io_delay.o rtc.o
obj-y			+= pci-iommu_table.o
obj-y			+= resource.o

obj-y				+= process.o
obj-y				+= i387.o xsave.o
obj-y				+= ptrace.o
obj-$(CONFIG_X86_32)		+= tls.o
obj-$(CONFIG_IA32_EMULATION)	+= tls.o
obj-y				+= step.o
obj-$(CONFIG_INTEL_TXT)		+= tboot.o
obj-$(CONFIG_ISA_DMA_API)	+= i8237.o
obj-$(CONFIG_STACKTRACE)	+= stacktrace.o
obj-y				+= cpu/
obj-y				+= acpi/
obj-y				+= reboot.o
obj-$(CONFIG_X86_MSR)		+= msr.o
obj-$(CONFIG_X86_CPUID)		+= cpuid.o
obj-$(CONFIG_PCI)		+= early-quirks.o
apm-y				:= apm_32.o
obj-$(CONFIG_APM)		+= apm.o
obj-$(CONFIG_SMP)		+= smp.o
obj-$(CONFIG_SMP)		+= smpboot.o
obj-$(CONFIG_SMP)		+= tsc_sync.o
obj-$(CONFIG_SMP)		+= setup_percpu.o
obj-$(CONFIG_X86_MPPARSE)	+= mpparse.o
obj-y				+= apic/
obj-$(CONFIG_X86_REBOOTFIXUPS)	+= reboot_fixups_32.o
obj-$(CONFIG_DYNAMIC_FTRACE)	+= ftrace.o
obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += ftrace.o
obj-$(CONFIG_FTRACE_SYSCALLS)	+= ftrace.o
obj-$(CONFIG_X86_TSC)		+= trace_clock.o
obj-$(CONFIG_KEXEC)		+= machine_kexec_$(BITS).o
obj-$(CONFIG_KEXEC)		+= relocate_kernel_$(BITS).o crash.o
obj-$(CONFIG_KEXEC_FILE)	+= kexec-bzimage64.o
obj-$(CONFIG_CRASH_DUMP)	+= crash_dump_$(BITS).o
obj-y				+= kprobes/
obj-$(CONFIG_MODULES)		+= module.o
obj-$(CONFIG_DOUBLEFAULT)	+= doublefault.o
obj-$(CONFIG_KGDB)		+= kgdb.o
obj-$(CONFIG_VM86)		+= vm86_32.o
obj-$(CONFIG_EARLY_PRINTK)	+= early_printk.o

obj-$(CONFIG_HPET_TIMER) 	+= hpet.o
obj-$(CONFIG_APB_TIMER)		+= apb_timer.o

obj-$(CONFIG_AMD_NB)		+= amd_nb.o
obj-$(CONFIG_DEBUG_RODATA_TEST)	+= test_rodata.o
obj-$(CONFIG_DEBUG_NX_TEST)	+= test_nx.o
obj-$(CONFIG_DEBUG_NMI_SELFTEST) += nmi_selftest.o

obj-$(CONFIG_KVM_GUEST)		+= kvm.o kvmclock.o
obj-$(CONFIG_PARAVIRT)		+= paravirt.o paravirt_patch_$(BITS).o
obj-$(CONFIG_PARAVIRT_SPINLOCKS)+= paravirt-spinlocks.o
obj-$(CONFIG_PARAVIRT_CLOCK)	+= pvclock.o

obj-$(CONFIG_PCSPKR_PLATFORM)	+= pcspeaker.o

obj-$(CONFIG_X86_CHECK_BIOS_CORRUPTION) += check.o

obj-$(CONFIG_SWIOTLB)			+= pci-swiotlb.o
obj-$(CONFIG_OF)			+= devicetree.o
obj-$(CONFIG_UPROBES)			+= uprobes.o
obj-y					+= sysfb.o
obj-$(CONFIG_X86_SYSFB)			+= sysfb_simplefb.o
obj-$(CONFIG_EFI)			+= sysfb_efi.o

obj-$(CONFIG_PERF_EVENTS)		+= perf_regs.o
obj-$(CONFIG_TRACING)			+= tracepoint.o
obj-$(CONFIG_IOSF_MBI)			+= iosf_mbi.o
obj-$(CONFIG_PMC_ATOM)			+= pmc_atom.o

###
# 64 bit specific files
ifeq ($(CONFIG_X86_64),y)
	obj-$(CONFIG_AUDIT)		+= audit_64.o

	obj-$(CONFIG_GART_IOMMU)	+= amd_gart_64.o aperture_64.o
	obj-$(CONFIG_CALGARY_IOMMU)	+= pci-calgary_64.o tce_64.o

	obj-$(CONFIG_PCI_MMCONFIG)	+= mmconf-fam10h_64.o
	obj-y				+= vsmp_64.o
endif