Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/x86

* git://git.kernel.org/pub/scm/linux/kernel/git/sam/x86:
  x86: enable "make ARCH=x86"
  x86: do not use $(ARCH) when not needed
  kconfig: use $K64BIT to set 64BIT with all*config targets
  kconfig: add helper to set config symbol from environment variable
  kconfig: factor out code in confdata.c
  x86: move the rest of the menu's to Kconfig
  x86: move all simple arch settings to Kconfig
  x86: copy x86_64 specific Kconfig symbols to Kconfig.i386
  x86: add X86_64 dependency to x86_64 specific symbols in Kconfig.x86_64
  x86: add X86_32 dependency to i386 specific symbols in Kconfig.i386
  x86: arch/x86/Kconfig.cpu unification
  x86: start unification of arch/x86/Kconfig.*
  x86: unification of cfufreq/Kconfig

Makefile

@@ -197,8 +197,15 @@ CROSS_COMPILE	?=
 UTS_MACHINE 	:= $(ARCH)
 SRCARCH 	:= $(ARCH)
 
-# for i386 and x86_64 we use SRCARCH equal to x86
-SRCARCH := $(if $(filter x86_64 i386,$(SRCARCH)),x86,$(SRCARCH))
+# Additional ARCH settings for x86
+ifeq ($(ARCH),i386)
+        SRCARCH := x86
+        K64BIT  := n
+endif
+ifeq ($(ARCH),x86_64)
+        SRCARCH := x86
+        K64BIT  := y
+endif
 
 KCONFIG_CONFIG	?= .config
 
@@ -334,7 +341,7 @@ KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
 
 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
-export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
+export ARCH SRCARCH K64BIT CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
 

README

@@ -194,6 +194,8 @@ CONFIGURING the kernel:
    "make *config" checks for a file named "all{yes/mod/no/random}.config"
    for symbol values that are to be forced.  If this file is not found,
    it checks for a file named "all.config" to contain forced values.
+   Finally it checks the environment variable K64BIT and if found, sets
+   the config symbol "64BIT" to the value of the K64BIT variable.
    
 	NOTES on "make config":
 	- having unnecessary drivers will make the kernel bigger, and can

arch/x86/Kconfig.i386 → arch/x86/Kconfig

@@ -1,18 +1,24 @@
-#
-# For a description of the syntax of this configuration file,
-# see Documentation/kbuild/kconfig-language.txt.
-#
+# x86 configuration
+mainmenu "Linux Kernel Configuration for x86"
 
-mainmenu "Linux Kernel Configuration"
+# Select 32 or 64 bit
+config 64BIT
+	bool "64-bit kernel"
+	default n
+	help
+	  Say yes to build a 64-bit kernel - formerly known as x86_64
+	  Say no to build a 32-bit kernel - formerly known as i386
 
 config X86_32
+	def_bool !64BIT
+
+config X86_64
+	def_bool 64BIT
+
+### Arch settings
+config X86
 	bool
 	default y
-	help
-	  This is Linux's home port.  Linux was originally native to the Intel
-	  386, and runs on all the later x86 processors including the Intel
-	  486, 586, Pentiums, and various instruction-set-compatible chips by
-	  AMD, Cyrix, and others.
 
 config GENERIC_TIME
 	bool
@@ -33,7 +39,7 @@ config GENERIC_CLOCKEVENTS
 config GENERIC_CLOCKEVENTS_BROADCAST
 	bool
 	default y
-	depends on X86_LOCAL_APIC
+	depends on X86_64 || (X86_32 && X86_LOCAL_APIC)
 
 config LOCKDEP_SUPPORT
 	bool
@@ -47,10 +53,6 @@ config SEMAPHORE_SLEEPERS
 	bool
 	default y
 
-config X86
-	bool
-	default y
-
 config MMU
 	bool
 	default y
@@ -61,7 +63,7 @@ config ZONE_DMA
 
 config QUICKLIST
 	bool
-	default y
+	default X86_32
 
 config SBUS
 	bool
@@ -91,6 +93,76 @@ config DMI
 	bool
 	default y
 
+config RWSEM_GENERIC_SPINLOCK
+	def_bool !X86_XADD
+
+config RWSEM_XCHGADD_ALGORITHM
+	def_bool X86_XADD
+
+config ARCH_HAS_ILOG2_U32
+	def_bool n
+
+config ARCH_HAS_ILOG2_U64
+	def_bool n
+
+config GENERIC_CALIBRATE_DELAY
+	def_bool y
+
+config GENERIC_TIME_VSYSCALL
+	bool
+	default X86_64
+
+
+
+
+
+config ZONE_DMA32
+	bool
+	default X86_64
+
+config ARCH_POPULATES_NODE_MAP
+	def_bool y
+
+config AUDIT_ARCH
+	bool
+	default X86_64
+
+# Use the generic interrupt handling code in kernel/irq/:
+config GENERIC_HARDIRQS
+	bool
+	default y
+
+config GENERIC_IRQ_PROBE
+	bool
+	default y
+
+config GENERIC_PENDING_IRQ
+	bool
+	depends on GENERIC_HARDIRQS && SMP
+	default y
+
+config X86_SMP
+	bool
+	depends on X86_32 && SMP && !X86_VOYAGER
+	default y
+
+config X86_HT
+	bool
+	depends on SMP && !(X86_VISWS || X86_VOYAGER || MK8)
+	default y
+
+config X86_BIOS_REBOOT
+	bool
+	depends on X86_32 && !(X86_VISWS || X86_VOYAGER)
+	default y
+
+config X86_TRAMPOLINE
+	bool
+	depends on X86_SMP || (X86_VOYAGER && SMP)
+	default y
+
+config KTIME_SCALAR
+	def_bool X86_32
 source "init/Kconfig"
 
 menu "Processor type and features"
@@ -137,6 +209,7 @@ config X86_PC
 
 config X86_ELAN
 	bool "AMD Elan"
+	depends on X86_32
 	help
 	  Select this for an AMD Elan processor.
 
@@ -146,6 +219,7 @@ config X86_ELAN
 
 config X86_VOYAGER
 	bool "Voyager (NCR)"
+	depends on X86_32
 	select SMP if !BROKEN
 	help
 	  Voyager is an MCA-based 32-way capable SMP architecture proprietary
@@ -160,6 +234,7 @@ config X86_NUMAQ
 	bool "NUMAQ (IBM/Sequent)"
 	select SMP
 	select NUMA
+	depends on X86_32
 	help
 	  This option is used for getting Linux to run on a (IBM/Sequent) NUMA
 	  multiquad box. This changes the way that processors are bootstrapped,
@@ -169,7 +244,7 @@ config X86_NUMAQ
 
 config X86_SUMMIT
 	bool "Summit/EXA (IBM x440)"
-	depends on SMP
+	depends on X86_32 && SMP
 	help
 	  This option is needed for IBM systems that use the Summit/EXA chipset.
 	  In particular, it is needed for the x440.
@@ -179,7 +254,7 @@ config X86_SUMMIT
 
 config X86_BIGSMP
 	bool "Support for other sub-arch SMP systems with more than 8 CPUs"
-	depends on SMP
+	depends on X86_32 && SMP
 	help
 	  This option is needed for the systems that have more than 8 CPUs
 	  and if the system is not of any sub-arch type above.
@@ -188,6 +263,7 @@ config X86_BIGSMP
 
 config X86_VISWS
 	bool "SGI 320/540 (Visual Workstation)"
+	depends on X86_32
 	help
 	  The SGI Visual Workstation series is an IA32-based workstation
 	  based on SGI systems chips with some legacy PC hardware attached.
@@ -199,6 +275,7 @@ config X86_VISWS
 
 config X86_GENERICARCH
        bool "Generic architecture (Summit, bigsmp, ES7000, default)"
+	depends on X86_32
        help
           This option compiles in the Summit, bigsmp, ES7000, default subarchitectures.
 	  It is intended for a generic binary kernel.
@@ -206,18 +283,27 @@ config X86_GENERICARCH
 
 config X86_ES7000
 	bool "Support for Unisys ES7000 IA32 series"
-	depends on SMP
+	depends on X86_32 && SMP
 	help
 	  Support for Unisys ES7000 systems.  Say 'Y' here if this kernel is
 	  supposed to run on an IA32-based Unisys ES7000 system.
 	  Only choose this option if you have such a system, otherwise you
 	  should say N here.
 
+config X86_VSMP
+	bool "Support for ScaleMP vSMP"
+	depends on X86_64 && PCI
+	 help
+	  Support for ScaleMP vSMP systems.  Say 'Y' here if this kernel is
+	  supposed to run on these EM64T-based machines.  Only choose this option
+	  if you have one of these machines.
+
 endchoice
 
 config SCHED_NO_NO_OMIT_FRAME_POINTER
 	bool "Single-depth WCHAN output"
 	default y
+	depends on X86_32
 	help
 	  Calculate simpler /proc/<PID>/wchan values. If this option
 	  is disabled then wchan values will recurse back to the
@@ -228,7 +314,7 @@ config SCHED_NO_NO_OMIT_FRAME_POINTER
 
 config PARAVIRT
 	bool
-	depends on !(X86_VISWS || X86_VOYAGER)
+	depends on X86_32 && !(X86_VISWS || X86_VOYAGER)
 	help
 	  This changes the kernel so it can modify itself when it is run
 	  under a hypervisor, potentially improving performance significantly
@@ -237,6 +323,7 @@ config PARAVIRT
 
 menuconfig PARAVIRT_GUEST
 	bool "Paravirtualized guest support"
+	depends on X86_32
 	help
 	  Say Y here to get to see options related to running Linux under
 	  various hypervisors.  This option alone does not add any kernel code.
@@ -264,7 +351,7 @@ endif
 config ACPI_SRAT
 	bool
 	default y
-	depends on ACPI && NUMA && (X86_SUMMIT || X86_GENERICARCH)
+	depends on X86_32 && ACPI && NUMA && (X86_SUMMIT || X86_GENERICARCH)
 	select ACPI_NUMA
 
 config HAVE_ARCH_PARSE_SRAT
@@ -275,12 +362,12 @@ config HAVE_ARCH_PARSE_SRAT
 config X86_SUMMIT_NUMA
 	bool
 	default y
-	depends on NUMA && (X86_SUMMIT || X86_GENERICARCH)
+	depends on X86_32 && NUMA && (X86_SUMMIT || X86_GENERICARCH)
 
 config X86_CYCLONE_TIMER
 	bool
 	default y
-	depends on X86_SUMMIT || X86_GENERICARCH
+	depends on X86_32 && X86_SUMMIT || X86_GENERICARCH
 
 config ES7000_CLUSTERED_APIC
 	bool
@@ -290,21 +377,89 @@ config ES7000_CLUSTERED_APIC
 source "arch/x86/Kconfig.cpu"
 
 config HPET_TIMER
-	bool "HPET Timer Support"
+	bool
+	prompt "HPET Timer Support" if X86_32
+	default X86_64
 	help
-	  This enables the use of the HPET for the kernel's internal timer.
-	  HPET is the next generation timer replacing legacy 8254s.
-	  You can safely choose Y here.  However, HPET will only be
-	  activated if the platform and the BIOS support this feature.
-	  Otherwise the 8254 will be used for timing services.
+         Use the IA-PC HPET (High Precision Event Timer) to manage
+         time in preference to the PIT and RTC, if a HPET is
+         present.
+         HPET is the next generation timer replacing legacy 8254s.
+         The HPET provides a stable time base on SMP
+         systems, unlike the TSC, but it is more expensive to access,
+         as it is off-chip.  You can find the HPET spec at
+         <http://www.intel.com/hardwaredesign/hpetspec.htm>.
 
-	  Choose N to continue using the legacy 8254 timer.
+         You can safely choose Y here.  However, HPET will only be
+         activated if the platform and the BIOS support this feature.
+         Otherwise the 8254 will be used for timing services.
+
+         Choose N to continue using the legacy 8254 timer.
 
 config HPET_EMULATE_RTC
 	bool
 	depends on HPET_TIMER && RTC=y
 	default y
 
+# Mark as embedded because too many people got it wrong.
+# The code disables itself when not needed.
+config GART_IOMMU
+	bool "GART IOMMU support" if EMBEDDED
+	default y
+	select SWIOTLB
+	select AGP
+	depends on X86_64 && PCI
+	help
+	  Support for full DMA access of devices with 32bit memory access only
+	  on systems with more than 3GB. This is usually needed for USB,
+	  sound, many IDE/SATA chipsets and some other devices.
+	  Provides a driver for the AMD Athlon64/Opteron/Turion/Sempron GART
+	  based hardware IOMMU and a software bounce buffer based IOMMU used
+	  on Intel systems and as fallback.
+	  The code is only active when needed (enough memory and limited
+	  device) unless CONFIG_IOMMU_DEBUG or iommu=force is specified
+	  too.
+
+config CALGARY_IOMMU
+	bool "IBM Calgary IOMMU support"
+	select SWIOTLB
+	depends on X86_64 && PCI && EXPERIMENTAL
+	help
+	  Support for hardware IOMMUs in IBM's xSeries x366 and x460
+	  systems. Needed to run systems with more than 3GB of memory
+	  properly with 32-bit PCI devices that do not support DAC
+	  (Double Address Cycle). Calgary also supports bus level
+	  isolation, where all DMAs pass through the IOMMU.  This
+	  prevents them from going anywhere except their intended
+	  destination. This catches hard-to-find kernel bugs and
+	  mis-behaving drivers and devices that do not use the DMA-API
+	  properly to set up their DMA buffers.  The IOMMU can be
+	  turned off at boot time with the iommu=off parameter.
+	  Normally the kernel will make the right choice by itself.
+	  If unsure, say Y.
+
+config CALGARY_IOMMU_ENABLED_BY_DEFAULT
+	bool "Should Calgary be enabled by default?"
+	default y
+	depends on CALGARY_IOMMU
+	help
+	  Should Calgary be enabled by default? if you choose 'y', Calgary
+	  will be used (if it exists). If you choose 'n', Calgary will not be
+	  used even if it exists. If you choose 'n' and would like to use
+	  Calgary anyway, pass 'iommu=calgary' on the kernel command line.
+	  If unsure, say Y.
+
+# need this always selected by IOMMU for the VIA workaround
+config SWIOTLB
+	bool
+	help
+	  Support for software bounce buffers used on x86-64 systems
+	  which don't have a hardware IOMMU (e.g. the current generation
+	  of Intel's x86-64 CPUs). Using this PCI devices which can only
+	  access 32-bits of memory can be used on systems with more than
+	  3 GB of memory. If unsure, say Y.
+
+
 config NR_CPUS
 	int "Maximum number of CPUs (2-255)"
 	range 2 255
@@ -321,7 +476,7 @@ config NR_CPUS
 
 config SCHED_SMT
 	bool "SMT (Hyperthreading) scheduler support"
-	depends on X86_HT
+	depends on (X86_64 && SMP) || (X86_32 && X86_HT)
 	help
 	  SMT scheduler support improves the CPU scheduler's decision making
 	  when dealing with Intel Pentium 4 chips with HyperThreading at a
@@ -330,7 +485,7 @@ config SCHED_SMT
 
 config SCHED_MC
 	bool "Multi-core scheduler support"
-	depends on X86_HT
+	depends on (X86_64 && SMP) || (X86_32 && X86_HT)
 	default y
 	help
 	  Multi-core scheduler support improves the CPU scheduler's decision
@@ -341,7 +496,7 @@ source "kernel/Kconfig.preempt"
 
 config X86_UP_APIC
 	bool "Local APIC support on uniprocessors"
-	depends on !SMP && !(X86_VISWS || X86_VOYAGER || X86_GENERICARCH)
+	depends on X86_32 && !SMP && !(X86_VISWS || X86_VOYAGER || X86_GENERICARCH)
 	help
 	  A local APIC (Advanced Programmable Interrupt Controller) is an
 	  integrated interrupt controller in the CPU. If you have a single-CPU
@@ -366,17 +521,17 @@ config X86_UP_IOAPIC
 
 config X86_LOCAL_APIC
 	bool
-	depends on X86_UP_APIC || ((X86_VISWS || SMP) && !X86_VOYAGER) || X86_GENERICARCH
+	depends on X86_64 || (X86_32 && (X86_UP_APIC || ((X86_VISWS || SMP) && !X86_VOYAGER) || X86_GENERICARCH))
 	default y
 
 config X86_IO_APIC
 	bool
-	depends on X86_UP_IOAPIC || (SMP && !(X86_VISWS || X86_VOYAGER)) || X86_GENERICARCH
+	depends on X86_64 || (X86_32 && (X86_UP_IOAPIC || (SMP && !(X86_VISWS || X86_VOYAGER)) || X86_GENERICARCH))
 	default y
 
 config X86_VISWS_APIC
 	bool
-	depends on X86_VISWS
+	depends on X86_32 && X86_VISWS
 	default y
 
 config X86_MCE
@@ -396,9 +551,25 @@ config X86_MCE
 	  to disable it.  MCE support simply ignores non-MCE processors like
 	  the 386 and 486, so nearly everyone can say Y here.
 
+config X86_MCE_INTEL
+	bool "Intel MCE features"
+	depends on X86_64 && X86_MCE && X86_LOCAL_APIC
+	default y
+	help
+	   Additional support for intel specific MCE features such as
+	   the thermal monitor.
+
+config X86_MCE_AMD
+	bool "AMD MCE features"
+	depends on X86_64 && X86_MCE && X86_LOCAL_APIC
+	default y
+	help
+	   Additional support for AMD specific MCE features such as
+	   the DRAM Error Threshold.
+
 config X86_MCE_NONFATAL
 	tristate "Check for non-fatal errors on AMD Athlon/Duron / Intel Pentium 4"
-	depends on X86_MCE
+	depends on X86_32 && X86_MCE
 	help
 	  Enabling this feature starts a timer that triggers every 5 seconds which
 	  will look at the machine check registers to see if anything happened.
@@ -411,14 +582,15 @@ config X86_MCE_NONFATAL
 
 config X86_MCE_P4THERMAL
 	bool "check for P4 thermal throttling interrupt."
-	depends on X86_MCE && (X86_UP_APIC || SMP) && !X86_VISWS
+	depends on X86_32 && X86_MCE && (X86_UP_APIC || SMP) && !X86_VISWS
 	help
 	  Enabling this feature will cause a message to be printed when the P4
 	  enters thermal throttling.
 
 config VM86
-	default y
 	bool "Enable VM86 support" if EMBEDDED
+	default y
+	depends on X86_32
 	help
           This option is required by programs like DOSEMU to run 16-bit legacy
 	  code on X86 processors. It also may be needed by software like
@@ -427,6 +599,7 @@ config VM86
 
 config TOSHIBA
 	tristate "Toshiba Laptop support"
+	depends on X86_32
 	---help---
 	  This adds a driver to safely access the System Management Mode of
 	  the CPU on Toshiba portables with a genuine Toshiba BIOS. It does
@@ -442,6 +615,7 @@ config TOSHIBA
 
 config I8K
 	tristate "Dell laptop support"
+	depends on X86_32
 	---help---
 	  This adds a driver to safely access the System Management Mode
 	  of the CPU on the Dell Inspiron 8000. The System Management Mode
@@ -462,7 +636,7 @@ config I8K
 
 config X86_REBOOTFIXUPS
 	bool "Enable X86 board specific fixups for reboot"
-	depends on X86
+	depends on X86_32 && X86
 	default n
 	---help---
 	  This enables chipset and/or board specific fixups to be done
@@ -517,12 +691,11 @@ config X86_CPUID
 	  with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to
 	  /dev/cpu/31/cpuid.
 
-source "drivers/firmware/Kconfig"
-
 choice
 	prompt "High Memory Support"
 	default HIGHMEM4G if !X86_NUMAQ
 	default HIGHMEM64G if X86_NUMAQ
+	depends on X86_32
 
 config NOHIGHMEM
 	bool "off"
@@ -582,6 +755,7 @@ choice
 	depends on EXPERIMENTAL
 	prompt "Memory split" if EMBEDDED
 	default VMSPLIT_3G
+	depends on X86_32
 	help
 	  Select the desired split between kernel and user memory.
 
@@ -619,16 +793,17 @@ config PAGE_OFFSET
 	default 0x78000000 if VMSPLIT_2G_OPT
 	default 0x40000000 if VMSPLIT_1G
 	default 0xC0000000
+	depends on X86_32
 
 config HIGHMEM
 	bool
-	depends on HIGHMEM64G || HIGHMEM4G
+	depends on X86_32 && (HIGHMEM64G || HIGHMEM4G)
 	default y
 
 config X86_PAE
 	bool "PAE (Physical Address Extension) Support"
 	default n
-	depends on !HIGHMEM4G
+	depends on X86_32 && !HIGHMEM4G
 	select RESOURCES_64BIT
 	help
 	  PAE is required for NX support, and furthermore enables
@@ -639,46 +814,82 @@ config X86_PAE
 # Common NUMA Features
 config NUMA
 	bool "Numa Memory Allocation and Scheduler Support (EXPERIMENTAL)"
-	depends on SMP && HIGHMEM64G && (X86_NUMAQ || (X86_SUMMIT || X86_GENERICARCH) && ACPI) && EXPERIMENTAL
+	depends on SMP
+	depends on X86_64 || (X86_32 && HIGHMEM64G && (X86_NUMAQ || (X86_SUMMIT || X86_GENERICARCH) && ACPI) && EXPERIMENTAL)
 	default n if X86_PC
 	default y if (X86_NUMAQ || X86_SUMMIT)
 	help
-	  NUMA support for i386. This is currently highly experimental
-	  and should be only used for kernel development. It might also
-	  cause boot failures.
+	  Enable NUMA (Non Uniform Memory Access) support.
+	  The kernel will try to allocate memory used by a CPU on the
+	  local memory controller of the CPU and add some more
+	  NUMA awareness to the kernel.
+
+	  For i386 this is currently highly experimental and should be only
+	  used for kernel development. It might also cause boot failures.
+	  For x86_64 this is recommended on all multiprocessor Opteron systems.
+	  If the system is EM64T, you should say N unless your system is
+	  EM64T NUMA.
 
 comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI"
-	depends on X86_SUMMIT && (!HIGHMEM64G || !ACPI)
+	depends on X86_32 && X86_SUMMIT && (!HIGHMEM64G || !ACPI)
+
+config K8_NUMA
+       bool "Old style AMD Opteron NUMA detection"
+       depends on X86_64 && NUMA && PCI
+       default y
+       help
+	 Enable K8 NUMA node topology detection.  You should say Y here if
+	 you have a multi processor AMD K8 system. This uses an old
+	 method to read the NUMA configuration directly from the builtin
+	 Northbridge of Opteron. It is recommended to use X86_64_ACPI_NUMA
+	 instead, which also takes priority if both are compiled in.
+
+config X86_64_ACPI_NUMA
+	bool "ACPI NUMA detection"
+	depends on X86_64 && NUMA && ACPI && PCI
+	select ACPI_NUMA
+	default y
+	help
+	  Enable ACPI SRAT based node topology detection.
+
+config NUMA_EMU
+	bool "NUMA emulation"
+	depends on X86_64 && NUMA
+	help
+	  Enable NUMA emulation. A flat machine will be split
+	  into virtual nodes when booted with "numa=fake=N", where N is the
+	  number of nodes. This is only useful for debugging.
 
 config NODES_SHIFT
 	int
+	default "6" if X86_64
 	default "4" if X86_NUMAQ
 	default "3"
 	depends on NEED_MULTIPLE_NODES
 
 config HAVE_ARCH_BOOTMEM_NODE
 	bool
-	depends on NUMA
+	depends on X86_32 && NUMA
 	default y
 
 config ARCH_HAVE_MEMORY_PRESENT
 	bool
-	depends on DISCONTIGMEM
+	depends on X86_32 && DISCONTIGMEM
 	default y
 
 config NEED_NODE_MEMMAP_SIZE
 	bool
-	depends on DISCONTIGMEM || SPARSEMEM
+	depends on X86_32 && (DISCONTIGMEM || SPARSEMEM)
 	default y
 
 config HAVE_ARCH_ALLOC_REMAP
 	bool
-	depends on NUMA
+	depends on X86_32 && NUMA
 	default y
 
 config ARCH_FLATMEM_ENABLE
 	def_bool y
-	depends on (ARCH_SELECT_MEMORY_MODEL && X86_PC)
+	depends on (X86_32 && ARCH_SELECT_MEMORY_MODEL && X86_PC) || (X86_64 && !NUMA)
 
 config ARCH_DISCONTIGMEM_ENABLE
 	def_bool y
@@ -690,21 +901,23 @@ config ARCH_DISCONTIGMEM_DEFAULT
 
 config ARCH_SPARSEMEM_ENABLE
 	def_bool y
-	depends on (NUMA || (X86_PC && EXPERIMENTAL))
-	select SPARSEMEM_STATIC
+	depends on NUMA || (EXPERIMENTAL && (X86_PC || X86_64))
+	select SPARSEMEM_STATIC if X86_32
+	select SPARSEMEM_VMEMMAP_ENABLE if X86_64
 
 config ARCH_SELECT_MEMORY_MODEL
 	def_bool y
-	depends on ARCH_SPARSEMEM_ENABLE
+	depends on X86_32 && ARCH_SPARSEMEM_ENABLE
 
-config ARCH_POPULATES_NODE_MAP
-	def_bool y
+config ARCH_MEMORY_PROBE
+	def_bool X86_64
+	depends on MEMORY_HOTPLUG
 
 source "mm/Kconfig"
 
 config HIGHPTE
 	bool "Allocate 3rd-level pagetables from highmem"
-	depends on HIGHMEM4G || HIGHMEM64G
+	depends on X86_32 && (HIGHMEM4G || HIGHMEM64G)
 	help
 	  The VM uses one page table entry for each page of physical memory.
 	  For systems with a lot of RAM, this can be wasteful of precious
@@ -712,7 +925,8 @@ config HIGHPTE
 	  entries in high memory.
 
 config MATH_EMULATION
-	bool "Math emulation"
+	bool
+	prompt "Math emulation" if X86_32
 	---help---
 	  Linux can emulate a math coprocessor (used for floating point
 	  operations) if you don't have one. 486DX and Pentium processors have
@@ -772,7 +986,7 @@ config MTRR
 
 config EFI
 	bool "Boot from EFI support"
-	depends on ACPI
+	depends on X86_32 && ACPI
 	default n
 	---help---
 	This enables the kernel to boot on EFI platforms using
@@ -789,18 +1003,18 @@ config EFI
 	kernel should continue to boot on existing non-EFI platforms.
 
 config IRQBALANCE
- 	bool "Enable kernel irq balancing"
-	depends on SMP && X86_IO_APIC
+	bool "Enable kernel irq balancing"
+	depends on X86_32 && SMP && X86_IO_APIC
 	default y
 	help
- 	  The default yes will allow the kernel to do irq load balancing.
+	  The default yes will allow the kernel to do irq load balancing.
 	  Saying no will keep the kernel from doing irq load balancing.
 
 # turning this on wastes a bunch of space.
 # Summit needs it only when NUMA is on
 config BOOT_IOREMAP
 	bool
-	depends on (((X86_SUMMIT || X86_GENERICARCH) && NUMA) || (X86 && EFI))
+	depends on X86_32 && (((X86_SUMMIT || X86_GENERICARCH) && NUMA) || (X86 && EFI))
 	default y
 
 config SECCOMP
@@ -820,6 +1034,30 @@ config SECCOMP
 
 	  If unsure, say Y. Only embedded should say N here.
 
+config CC_STACKPROTECTOR
+	bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
+	depends on X86_64 && EXPERIMENTAL
+	help
+         This option turns on the -fstack-protector GCC feature. This
+	  feature puts, at the beginning of critical functions, a canary
+	  value on the stack just before the return address, and validates
+	  the value just before actually returning.  Stack based buffer
+	  overflows (that need to overwrite this return address) now also
+	  overwrite the canary, which gets detected and the attack is then
+	  neutralized via a kernel panic.
+
+	  This feature requires gcc version 4.2 or above, or a distribution
+	  gcc with the feature backported. Older versions are automatically
+	  detected and for those versions, this configuration option is ignored.
+
+config CC_STACKPROTECTOR_ALL
+	bool "Use stack-protector for all functions"
+	depends on CC_STACKPROTECTOR
+	help
+	  Normally, GCC only inserts the canary value protection for
+	  functions that use large-ish on-stack buffers. By enabling
+	  this option, GCC will be asked to do this for ALL functions.
+
 source kernel/Kconfig.hz
 
 config KEXEC
@@ -841,7 +1079,7 @@ config KEXEC
 config CRASH_DUMP
 	bool "kernel crash dumps (EXPERIMENTAL)"
 	depends on EXPERIMENTAL
-	depends on HIGHMEM
+	depends on X86_64 || (X86_32 && HIGHMEM)
 	help
 	  Generate crash dump after being started by kexec.
 	  This should be normally only set in special crash dump kernels
@@ -856,6 +1094,7 @@ config CRASH_DUMP
 config PHYSICAL_START
 	hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP)
 	default "0x1000000" if X86_NUMAQ
+	default "0x200000" if X86_64
 	default "0x100000"
 	help
 	  This gives the physical address where the kernel is loaded.
@@ -908,25 +1147,31 @@ config RELOCATABLE
 	  must live at a different physical address than the primary
 	  kernel.
 
+	  Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
+	  it has been loaded at and the compile time physical address
+	  (CONFIG_PHYSICAL_START) is ignored.
+
 config PHYSICAL_ALIGN
-	hex "Alignment value to which kernel should be aligned"
-	default "0x100000"
+	hex
+	prompt "Alignment value to which kernel should be aligned" if X86_32
+	default "0x100000" if X86_32
+	default "0x200000" if X86_64
 	range 0x2000 0x400000
 	help
 	  This value puts the alignment restrictions on physical address
- 	  where kernel is loaded and run from. Kernel is compiled for an
- 	  address which meets above alignment restriction.
-
- 	  If bootloader loads the kernel at a non-aligned address and
- 	  CONFIG_RELOCATABLE is set, kernel will move itself to nearest
- 	  address aligned to above value and run from there.
-
- 	  If bootloader loads the kernel at a non-aligned address and
- 	  CONFIG_RELOCATABLE is not set, kernel will ignore the run time
- 	  load address and decompress itself to the address it has been
- 	  compiled for and run from there. The address for which kernel is
- 	  compiled already meets above alignment restrictions. Hence the
- 	  end result is that kernel runs from a physical address meeting
+	  where kernel is loaded and run from. Kernel is compiled for an
+	  address which meets above alignment restriction.
+
+	  If bootloader loads the kernel at a non-aligned address and
+	  CONFIG_RELOCATABLE is set, kernel will move itself to nearest
+	  address aligned to above value and run from there.
+
+	  If bootloader loads the kernel at a non-aligned address and
+	  CONFIG_RELOCATABLE is not set, kernel will ignore the run time
+	  load address and decompress itself to the address it has been
+	  compiled for and run from there. The address for which kernel is
+	  compiled already meets above alignment restrictions. Hence the
+	  end result is that kernel runs from a physical address meeting
 	  above alignment restrictions.
 
 	  Don't change this unless you know what you are doing.
@@ -938,10 +1183,13 @@ config HOTPLUG_CPU
 	  Say Y here to experiment with turning CPUs off and on, and to
 	  enable suspend on SMP systems. CPUs can be controlled through
 	  /sys/devices/system/cpu.
+	  Say N if you want to disable CPU hotplug and don't need to
+	  suspend.
 
 config COMPAT_VDSO
 	bool "Compat VDSO support"
 	default y
+	depends on X86_32
 	help
 	  Map the VDSO to the predictable old-style address too.
 	---help---
@@ -955,18 +1203,35 @@ endmenu
 
 config ARCH_ENABLE_MEMORY_HOTPLUG
 	def_bool y
-	depends on HIGHMEM
+	depends on X86_64 || (X86_32 && HIGHMEM)
+
+config MEMORY_HOTPLUG_RESERVE
+	def_bool X86_64
+	depends on (MEMORY_HOTPLUG && DISCONTIGMEM)
+
+config HAVE_ARCH_EARLY_PFN_TO_NID
+	def_bool X86_64
+	depends on NUMA
 
-menu "Power management options (ACPI, APM)"
+config OUT_OF_LINE_PFN_TO_PAGE
+	def_bool X86_64
+	depends on DISCONTIGMEM
+
+menu "Power management options"
 	depends on !X86_VOYAGER
 
-source kernel/power/Kconfig
+config ARCH_HIBERNATION_HEADER
+	bool
+	depends on X86_64 && HIBERNATION
+	default y
+
+source "kernel/power/Kconfig"
 
 source "drivers/acpi/Kconfig"
 
 menuconfig APM
 	tristate "APM (Advanced Power Management) BIOS support"
-	depends on PM_SLEEP && !X86_VISWS
+	depends on X86_32 && PM_SLEEP && !X86_VISWS
 	---help---
 	  APM is a BIOS specification for saving power using several different
 	  techniques. This is mostly useful for battery powered laptops with
@@ -1092,13 +1357,14 @@ config APM_REAL_MODE_POWER_OFF
 
 endif # APM
 
-source "arch/x86/kernel/cpu/cpufreq/Kconfig_32"
+source "arch/x86/kernel/cpu/cpufreq/Kconfig"
 
 source "drivers/cpuidle/Kconfig"
 
 endmenu
 
-menu "Bus options (PCI, PCMCIA, EISA, MCA, ISA)"
+
+menu "Bus options (PCI etc.)"
 
 config PCI
 	bool "PCI support" if !X86_VISWS
@@ -1118,7 +1384,7 @@ config PCI
 
 choice
 	prompt "PCI access mode"
-	depends on PCI && !X86_VISWS
+	depends on X86_32 && PCI && !X86_VISWS
 	default PCI_GOANY
 	---help---
 	  On PCI systems, the BIOS can be used to detect the PCI devices and
@@ -1151,17 +1417,18 @@ endchoice
 
 config PCI_BIOS
 	bool
-	depends on !X86_VISWS && PCI && (PCI_GOBIOS || PCI_GOANY)
+	depends on X86_32 && !X86_VISWS && PCI && (PCI_GOBIOS || PCI_GOANY)
 	default y
 
+# x86-64 doesn't support PCI BIOS access from long mode so always go direct.
 config PCI_DIRECT
 	bool
- 	depends on PCI && ((PCI_GODIRECT || PCI_GOANY) || X86_VISWS)
+	depends on PCI && (X86_64 || (PCI_GODIRECT || PCI_GOANY) || X86_VISWS)
 	default y
 
 config PCI_MMCONFIG
 	bool
-	depends on PCI && ACPI && (PCI_GOMMCONFIG || PCI_GOANY)
+	depends on X86_32 && PCI && ACPI && (PCI_GOMMCONFIG || PCI_GOANY)
 	default y
 
 config PCI_DOMAINS
@@ -1169,14 +1436,52 @@ config PCI_DOMAINS
 	depends on PCI
 	default y
 
+config PCI_MMCONFIG
+	bool "Support mmconfig PCI config space access"
+	depends on X86_64 && PCI && ACPI
+
+config DMAR
+	bool "Support for DMA Remapping Devices (EXPERIMENTAL)"
+	depends on X86_64 && PCI_MSI && ACPI && EXPERIMENTAL
+	help
+	  DMA remapping (DMAR) devices support enables independent address
+	  translations for Direct Memory Access (DMA) from devices.
+	  These DMA remapping devices are reported via ACPI tables
+	  and include PCI device scope covered by these DMA
+	  remapping devices.
+
+config DMAR_GFX_WA
+	bool "Support for Graphics workaround"
+	depends on DMAR
+	default y
+	help
+	 Current Graphics drivers tend to use physical address
+	 for DMA and avoid using DMA APIs. Setting this config
+	 option permits the IOMMU driver to set a unity map for
+	 all the OS-visible memory. Hence the driver can continue
+	 to use physical addresses for DMA.
+
+config DMAR_FLOPPY_WA
+	bool
+	depends on DMAR
+	default y
+	help
+	 Floppy disk drivers are know to bypass DMA API calls
+	 thereby failing to work when IOMMU is enabled. This
+	 workaround will setup a 1:1 mapping for the first
+	 16M to make floppy (an ISA device) work.
+
 source "drivers/pci/pcie/Kconfig"
 
 source "drivers/pci/Kconfig"
 
+# x86_64 have no ISA slots, but do have ISA-style DMA.
 config ISA_DMA_API
 	bool
 	default y
 
+if X86_32
+
 config ISA
 	bool "ISA support"
 	depends on !(X86_VOYAGER || X86_VISWS)
@@ -1248,9 +1553,11 @@ config GEODE_MFGPT_TIMER
 	  MFGPTs have a better resolution and max interval than the
 	  generic PIT, and are suitable for use as high-res timers.
 
+endif # X86_32
+
 config K8_NB
 	def_bool y
-	depends on AGP_AMD64
+	depends on AGP_AMD64 || (X86_64 && (GART_IOMMU || (PCI && NUMA)))
 
 source "drivers/pcmcia/Kconfig"
 
@@ -1258,16 +1565,48 @@ source "drivers/pci/hotplug/Kconfig"
 
 endmenu
 
-menu "Executable file formats"
+
+menu "Executable file formats / Emulations"
 
 source "fs/Kconfig.binfmt"
 
+config IA32_EMULATION
+	bool "IA32 Emulation"
+	depends on X86_64
+	help
+	  Include code to run 32-bit programs under a 64-bit kernel. You should
+	  likely turn this on, unless you're 100% sure that you don't have any
+	  32-bit programs left.
+
+config IA32_AOUT
+       tristate "IA32 a.out support"
+       depends on IA32_EMULATION
+       help
+         Support old a.out binaries in the 32bit emulation.
+
+config COMPAT
+	bool
+	depends on IA32_EMULATION
+	default y
+
+config COMPAT_FOR_U64_ALIGNMENT
+	def_bool COMPAT
+	depends on X86_64
+
+config SYSVIPC_COMPAT
+	bool
+	depends on X86_64 && COMPAT && SYSVIPC
+	default y
+
 endmenu
 
+
 source "net/Kconfig"
 
 source "drivers/Kconfig"
 
+source "drivers/firmware/Kconfig"
+
 source "fs/Kconfig"
 
 source "kernel/Kconfig.instrumentation"
@@ -1279,43 +1618,3 @@ source "security/Kconfig"
 source "crypto/Kconfig"
 
 source "lib/Kconfig"
-
-#
-# Use the generic interrupt handling code in kernel/irq/:
-#
-config GENERIC_HARDIRQS
-	bool
-	default y
-
-config GENERIC_IRQ_PROBE
-	bool
-	default y
-
-config GENERIC_PENDING_IRQ
-	bool
-	depends on GENERIC_HARDIRQS && SMP
-	default y
-
-config X86_SMP
-	bool
-	depends on SMP && !X86_VOYAGER
-	default y
-
-config X86_HT
-	bool
-	depends on SMP && !(X86_VISWS || X86_VOYAGER)
-	default y
-
-config X86_BIOS_REBOOT
-	bool
-	depends on !(X86_VISWS || X86_VOYAGER)
-	default y
-
-config X86_TRAMPOLINE
-	bool
-	depends on X86_SMP || (X86_VOYAGER && SMP)
-	default y
-
-config KTIME_SCALAR
-	bool
-	default y

arch/x86/Kconfig.cpu

@@ -3,11 +3,12 @@ if !X86_ELAN
 
 choice
 	prompt "Processor family"
-	default M686
+	default M686 if X86_32
+	default GENERIC_CPU if X86_64
 
 config M386
 	bool "386"
-	depends on !UML
+	depends on X86_32 && !UML
 	---help---
 	  This is the processor type of your CPU. This information is used for
 	  optimizing purposes. In order to compile a kernel that can run on
@@ -49,6 +50,7 @@ config M386
 
 config M486
 	bool "486"
+	depends on X86_32
 	help
 	  Select this for a 486 series processor, either Intel or one of the
 	  compatible processors from AMD, Cyrix, IBM, or Intel.  Includes DX,
@@ -57,6 +59,7 @@ config M486
 
 config M586
 	bool "586/K5/5x86/6x86/6x86MX"
+	depends on X86_32
 	help
 	  Select this for an 586 or 686 series processor such as the AMD K5,
 	  the Cyrix 5x86, 6x86 and 6x86MX.  This choice does not
@@ -64,18 +67,21 @@ config M586
 
 config M586TSC
 	bool "Pentium-Classic"
+	depends on X86_32
 	help
 	  Select this for a Pentium Classic processor with the RDTSC (Read
 	  Time Stamp Counter) instruction for benchmarking.
 
 config M586MMX
 	bool "Pentium-MMX"
+	depends on X86_32
 	help
 	  Select this for a Pentium with the MMX graphics/multimedia
 	  extended instructions.
 
 config M686
 	bool "Pentium-Pro"
+	depends on X86_32
 	help
 	  Select this for Intel Pentium Pro chips.  This enables the use of
 	  Pentium Pro extended instructions, and disables the init-time guard
@@ -83,6 +89,7 @@ config M686
 
 config MPENTIUMII
 	bool "Pentium-II/Celeron(pre-Coppermine)"
+	depends on X86_32
 	help
 	  Select this for Intel chips based on the Pentium-II and
 	  pre-Coppermine Celeron core.  This option enables an unaligned
@@ -92,6 +99,7 @@ config MPENTIUMII
 
 config MPENTIUMIII
 	bool "Pentium-III/Celeron(Coppermine)/Pentium-III Xeon"
+	depends on X86_32
 	help
 	  Select this for Intel chips based on the Pentium-III and
 	  Celeron-Coppermine core.  This option enables use of some
@@ -100,19 +108,14 @@ config MPENTIUMIII
 
 config MPENTIUMM
 	bool "Pentium M"
+	depends on X86_32
 	help
 	  Select this for Intel Pentium M (not Pentium-4 M)
 	  notebook chips.
 
-config MCORE2
-	bool "Core 2/newer Xeon"
-	help
-	  Select this for Intel Core 2 and newer Core 2 Xeons (Xeon 51xx and 53xx)
-	  CPUs. You can distinguish newer from older Xeons by the CPU family
-	  in /proc/cpuinfo. Newer ones have 6 and older ones 15 (not a typo)
-
 config MPENTIUM4
 	bool "Pentium-4/Celeron(P4-based)/Pentium-4 M/older Xeon"
+	depends on X86_32
 	help
 	  Select this for Intel Pentium 4 chips.  This includes the
 	  Pentium 4, Pentium D, P4-based Celeron and Xeon, and
@@ -148,6 +151,7 @@ config MPENTIUM4
 
 config MK6
 	bool "K6/K6-II/K6-III"
+	depends on X86_32
 	help
 	  Select this for an AMD K6-family processor.  Enables use of
 	  some extended instructions, and passes appropriate optimization
@@ -155,6 +159,7 @@ config MK6
 
 config MK7
 	bool "Athlon/Duron/K7"
+	depends on X86_32
 	help
 	  Select this for an AMD Athlon K7-family processor.  Enables use of
 	  some extended instructions, and passes appropriate optimization
@@ -169,6 +174,7 @@ config MK8
 
 config MCRUSOE
 	bool "Crusoe"
+	depends on X86_32
 	help
 	  Select this for a Transmeta Crusoe processor.  Treats the processor
 	  like a 586 with TSC, and sets some GCC optimization flags (like a
@@ -176,11 +182,13 @@ config MCRUSOE
 
 config MEFFICEON
 	bool "Efficeon"
+	depends on X86_32
 	help
 	  Select this for a Transmeta Efficeon processor.
 
 config MWINCHIPC6
 	bool "Winchip-C6"
+	depends on X86_32
 	help
 	  Select this for an IDT Winchip C6 chip.  Linux and GCC
 	  treat this chip as a 586TSC with some extended instructions
@@ -188,6 +196,7 @@ config MWINCHIPC6
 
 config MWINCHIP2
 	bool "Winchip-2"
+	depends on X86_32
 	help
 	  Select this for an IDT Winchip-2.  Linux and GCC
 	  treat this chip as a 586TSC with some extended instructions
@@ -195,6 +204,7 @@ config MWINCHIP2
 
 config MWINCHIP3D
 	bool "Winchip-2A/Winchip-3"
+	depends on X86_32
 	help
 	  Select this for an IDT Winchip-2A or 3.  Linux and GCC
 	  treat this chip as a 586TSC with some extended instructions
@@ -204,16 +214,19 @@ config MWINCHIP3D
 
 config MGEODEGX1
 	bool "GeodeGX1"
+	depends on X86_32
 	help
 	  Select this for a Geode GX1 (Cyrix MediaGX) chip.
 
 config MGEODE_LX
        bool "Geode GX/LX"
+	depends on X86_32
        help
          Select this for AMD Geode GX and LX processors.
 
 config MCYRIXIII
 	bool "CyrixIII/VIA-C3"
+	depends on X86_32
 	help
 	  Select this for a Cyrix III or C3 chip.  Presently Linux and GCC
 	  treat this chip as a generic 586. Whilst the CPU is 686 class,
@@ -225,6 +238,7 @@ config MCYRIXIII
 
 config MVIAC3_2
 	bool "VIA C3-2 (Nehemiah)"
+	depends on X86_32
 	help
 	  Select this for a VIA C3 "Nehemiah". Selecting this enables usage
 	  of SSE and tells gcc to treat the CPU as a 686.
@@ -232,15 +246,42 @@ config MVIAC3_2
 
 config MVIAC7
 	bool "VIA C7"
+	depends on X86_32
 	help
 	  Select this for a VIA C7.  Selecting this uses the correct cache
 	  shift and tells gcc to treat the CPU as a 686.
 
+config MPSC
+	bool "Intel P4 / older Netburst based Xeon"
+	depends on X86_64
+	help
+	  Optimize for Intel Pentium 4, Pentium D and older Nocona/Dempsey
+	  Xeon CPUs with Intel 64bit which is compatible with x86-64.
+	  Note that the latest Xeons (Xeon 51xx and 53xx) are not based on the
+          Netburst core and shouldn't use this option. You can distinguish them
+	  using the cpu family field
+	  in /proc/cpuinfo. Family 15 is an older Xeon, Family 6 a newer one.
+
+config MCORE2
+	bool "Core 2/newer Xeon"
+	help
+	  Select this for Intel Core 2 and newer Core 2 Xeons (Xeon 51xx and 53xx)
+	  CPUs. You can distinguish newer from older Xeons by the CPU family
+	  in /proc/cpuinfo. Newer ones have 6 and older ones 15 (not a typo)
+
+config GENERIC_CPU
+	bool "Generic-x86-64"
+	depends on X86_64
+	help
+	  Generic x86-64 CPU.
+	  Run equally well on all x86-64 CPUs.
+
 endchoice
 
 config X86_GENERIC
-       bool "Generic x86 support"
-       help
+	bool "Generic x86 support"
+	depends on X86_32
+	help
 	  Instead of just including optimizations for the selected
 	  x86 variant (e.g. PII, Crusoe or Athlon), include some more
 	  generic optimizations as well. This will make the kernel
@@ -253,44 +294,31 @@ endif
 
 #
 # Define implied options from the CPU selection here
-#
+config X86_L1_CACHE_BYTES
+	int
+	default "128" if GENERIC_CPU || MPSC
+	default "64" if MK8 || MCORE2
+	depends on X86_64
+
+config X86_INTERNODE_CACHE_BYTES
+	int
+	default "4096" if X86_VSMP
+	default X86_L1_CACHE_BYTES if !X86_VSMP
+	depends on X86_64
+
 config X86_CMPXCHG
-	bool
-	depends on !M386
-	default y
+	def_bool X86_64 || (X86_32 && !M386)
 
 config X86_L1_CACHE_SHIFT
 	int
-	default "7" if MPENTIUM4 || X86_GENERIC
+	default "7" if MPENTIUM4 || X86_GENERIC || GENERIC_CPU || MPSC
 	default "4" if X86_ELAN || M486 || M386 || MGEODEGX1
 	default "5" if MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX
 	default "6" if MK7 || MK8 || MPENTIUMM || MCORE2 || MVIAC7
 
 config X86_XADD
 	bool
-	depends on !M386
-	default y
-
-config RWSEM_GENERIC_SPINLOCK
-	bool
-	depends on !X86_XADD
-	default y
-
-config RWSEM_XCHGADD_ALGORITHM
-	bool
-	depends on X86_XADD
-	default y
-
-config ARCH_HAS_ILOG2_U32
-	bool
-	default n
-
-config ARCH_HAS_ILOG2_U64
-	bool
-	default n
-
-config GENERIC_CALIBRATE_DELAY
-	bool
+	depends on X86_32 && !M386
 	default y
 
 config X86_PPRO_FENCE
@@ -305,22 +333,22 @@ config X86_F00F_BUG
 
 config X86_WP_WORKS_OK
 	bool
-	depends on !M386
+	depends on X86_32 && !M386
 	default y
 
 config X86_INVLPG
 	bool
-	depends on !M386
+	depends on X86_32 && !M386
 	default y
 
 config X86_BSWAP
 	bool
-	depends on !M386
+	depends on X86_32 && !M386
 	default y
 
 config X86_POPAD_OK
 	bool
-	depends on !M386
+	depends on X86_32 && !M386
 	default y
 
 config X86_ALIGNMENT_16
@@ -330,7 +358,7 @@ config X86_ALIGNMENT_16
 
 config X86_GOOD_APIC
 	bool
-	depends on MK7 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || MK8 || MEFFICEON || MCORE2 || MVIAC7
+	depends on MK7 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || MK8 || MEFFICEON || MCORE2 || MVIAC7 || X86_64
 	default y
 
 config X86_INTEL_USERCOPY
@@ -355,7 +383,7 @@ config X86_OOSTORE
 
 config X86_TSC
 	bool
-	depends on (MWINCHIP3D || MWINCHIP2 || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MVIAC7 || MGEODEGX1 || MGEODE_LX || MCORE2) && !X86_NUMAQ
+	depends on ((MWINCHIP3D || MWINCHIP2 || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MVIAC7 || MGEODEGX1 || MGEODE_LX || MCORE2) && !X86_NUMAQ) || X86_64
 	default y
 
 # this should be set for all -march=.. options where the compiler
@@ -367,6 +395,7 @@ config X86_CMOV
 
 config X86_MINIMUM_CPU_FAMILY
 	int
-	default "4" if X86_XADD || X86_CMPXCHG || X86_BSWAP || X86_WP_WORKS_OK
+	default "64" if X86_64
+	default "4" if X86_32 && (X86_XADD || X86_CMPXCHG || X86_BSWAP || X86_WP_WORKS_OK)
 	default "3"
 

arch/x86/Kconfig.x86_64

@@ -1,839 +0,0 @@
-#
-# For a description of the syntax of this configuration file,
-# see Documentation/kbuild/kconfig-language.txt.
-#
-# Note: ISA is disabled and will hopefully never be enabled.
-# If you managed to buy an ISA x86-64 box you'll have to fix all the
-# ISA drivers you need yourself.
-#
-
-mainmenu "Linux Kernel Configuration"
-
-config X86_64
-	bool
-	default y
-	help
-	  Port to the x86-64 architecture. x86-64 is a 64-bit extension to the
-	  classical 32-bit x86 architecture. For details see
-	  <http://www.x86-64.org/>.
-
-config 64BIT
-	def_bool y
-
-config X86
-	bool
-	default y
-
-config GENERIC_TIME
-	bool
-	default y
-
-config GENERIC_TIME_VSYSCALL
-	bool
-	default y
-
-config GENERIC_CMOS_UPDATE
-	bool
-	default y
-
-config CLOCKSOURCE_WATCHDOG
-	bool
-	default y
-
-config GENERIC_CLOCKEVENTS
-	bool
-	default y
-
-config GENERIC_CLOCKEVENTS_BROADCAST
-	bool
-	default y
-
-config ZONE_DMA32
-	bool
-	default y
-
-config LOCKDEP_SUPPORT
-	bool
-	default y
-
-config STACKTRACE_SUPPORT
-	bool
-	default y
-
-config SEMAPHORE_SLEEPERS
-	bool
-	default y
-
-config MMU
-	bool
-	default y
-
-config ZONE_DMA
-	bool
-	default y
-
-config ISA
-	bool
-
-config SBUS
-	bool
-
-config RWSEM_GENERIC_SPINLOCK
-	bool
-	default y
-
-config RWSEM_XCHGADD_ALGORITHM
-	bool
-
-config GENERIC_HWEIGHT
-	bool
-	default y
-
-config GENERIC_CALIBRATE_DELAY
-	bool
-	default y
-
-config X86_CMPXCHG
-	bool
-	default y
-
-config GENERIC_ISA_DMA
-	bool
-	default y
-
-config GENERIC_IOMAP
-	bool
-	default y
-
-config ARCH_MAY_HAVE_PC_FDC
-	bool
-	default y
-
-config ARCH_POPULATES_NODE_MAP
-	def_bool y
-
-config DMI
-	bool
-	default y
-
-config AUDIT_ARCH
-	bool
-	default y
-
-config GENERIC_BUG
-	bool
-	default y
-	depends on BUG
-
-config ARCH_HAS_ILOG2_U32
-	bool
-	default n
-
-config ARCH_HAS_ILOG2_U64
-	bool
-	default n
-
-source "init/Kconfig"
-
-
-menu "Processor type and features"
-
-source "kernel/time/Kconfig"
-
-choice
-	prompt "Subarchitecture Type"
-	default X86_PC
-
-config X86_PC
-	bool "PC-compatible"
-	help
-	  Choose this option if your computer is a standard PC or compatible.
-
-config X86_VSMP
-	bool "Support for ScaleMP vSMP"
-	depends on PCI
-	 help
-	  Support for ScaleMP vSMP systems.  Say 'Y' here if this kernel is
-	  supposed to run on these EM64T-based machines.  Only choose this option
-	  if you have one of these machines.
-
-endchoice
-
-choice
-	prompt "Processor family"
-	default GENERIC_CPU
-
-config MK8
-	bool "AMD-Opteron/Athlon64"
-	help
-	  Optimize for AMD Opteron/Athlon64/Hammer/K8 CPUs.
-
-config MPSC
-       bool "Intel P4 / older Netburst based Xeon"
-       help
-	  Optimize for Intel Pentium 4, Pentium D and older Nocona/Dempsey
-	  Xeon CPUs with Intel 64bit which is compatible with x86-64.
-	  Note that the latest Xeons (Xeon 51xx and 53xx) are not based on the
-          Netburst core and shouldn't use this option. You can distinguish them
-	  using the cpu family field
-	  in /proc/cpuinfo. Family 15 is an older Xeon, Family 6 a newer one.
-
-config MCORE2
-	bool "Intel Core2 / newer Xeon"
-	help
-	  Optimize for Intel Core2 and newer Xeons (51xx)
-	  You can distinguish the newer Xeons from the older ones using
-	  the cpu family field in /proc/cpuinfo. 15 is an older Xeon
-	  (use CONFIG_MPSC then), 6 is a newer one.
-
-config GENERIC_CPU
-	bool "Generic-x86-64"
-	help
-	  Generic x86-64 CPU.
-	  Run equally well on all x86-64 CPUs.
-
-endchoice
-
-#
-# Define implied options from the CPU selection here
-#
-config X86_L1_CACHE_BYTES
-	int
-	default "128" if GENERIC_CPU || MPSC
-	default "64" if MK8 || MCORE2
-
-config X86_L1_CACHE_SHIFT
-	int
-	default "7" if GENERIC_CPU || MPSC
-	default "6" if MK8 || MCORE2
-
-config X86_INTERNODE_CACHE_BYTES
-	int
-	default "4096" if X86_VSMP
-	default X86_L1_CACHE_BYTES if !X86_VSMP
-
-config X86_TSC
-	bool
-	default y
-
-config X86_GOOD_APIC
-	bool
-	default y
-
-config MICROCODE
-	tristate "/dev/cpu/microcode - Intel CPU microcode support"
-	select FW_LOADER
-	---help---
-	  If you say Y here the 'File systems' section, you will be
-	  able to update the microcode on Intel processors. You will
-	  obviously need the actual microcode binary data itself which is
-	  not shipped with the Linux kernel.
-
-	  For latest news and information on obtaining all the required
-	  ingredients for this driver, check:
-	  <http://www.urbanmyth.org/microcode/>.
-
-	  To compile this driver as a module, choose M here: the
-	  module will be called microcode.
-	  If you use modprobe or kmod you may also want to add the line
-	  'alias char-major-10-184 microcode' to your /etc/modules.conf file.
-
-config MICROCODE_OLD_INTERFACE
-	bool
-	depends on MICROCODE
-	default y
-
-config X86_MSR
-	tristate "/dev/cpu/*/msr - Model-specific register support"
-	help
-	  This device gives privileged processes access to the x86
-	  Model-Specific Registers (MSRs).  It is a character device with
-	  major 202 and minors 0 to 31 for /dev/cpu/0/msr to /dev/cpu/31/msr.
-	  MSR accesses are directed to a specific CPU on multi-processor
-	  systems.
-
-config X86_CPUID
-	tristate "/dev/cpu/*/cpuid - CPU information support"
-	help
-	  This device gives processes access to the x86 CPUID instruction to
-	  be executed on a specific processor.  It is a character device
-	  with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to
-	  /dev/cpu/31/cpuid.
-
-config X86_HT
-	bool
-	depends on SMP && !MK8
-	default y
-
-config MATH_EMULATION
-	bool
-
-config MCA
-	bool
-
-config EISA
-	bool
-
-config X86_IO_APIC
-	bool
-	default y
-
-config X86_LOCAL_APIC
-	bool
-	default y
-
-config MTRR
-	bool "MTRR (Memory Type Range Register) support"
-	---help---
-	  On Intel P6 family processors (Pentium Pro, Pentium II and later)
-	  the Memory Type Range Registers (MTRRs) may be used to control
-	  processor access to memory ranges. This is most useful if you have
-	  a video (VGA) card on a PCI or AGP bus. Enabling write-combining
-	  allows bus write transfers to be combined into a larger transfer
-	  before bursting over the PCI/AGP bus. This can increase performance
-	  of image write operations 2.5 times or more. Saying Y here creates a
-	  /proc/mtrr file which may be used to manipulate your processor's
-	  MTRRs. Typically the X server should use this.
-
-	  This code has a reasonably generic interface so that similar
-	  control registers on other processors can be easily supported
-	  as well.
-
-	  Saying Y here also fixes a problem with buggy SMP BIOSes which only
-	  set the MTRRs for the boot CPU and not for the secondary CPUs. This
-	  can lead to all sorts of problems, so it's good to say Y here.
-
-	  Just say Y here, all x86-64 machines support MTRRs.
-
-	  See <file:Documentation/mtrr.txt> for more information.
-
-config SMP
-	bool "Symmetric multi-processing support"
-	---help---
-	  This enables support for systems with more than one CPU. If you have
-	  a system with only one CPU, like most personal computers, say N. If
-	  you have a system with more than one CPU, say Y.
-
-	  If you say N here, the kernel will run on single and multiprocessor
-	  machines, but will use only one CPU of a multiprocessor machine. If
-	  you say Y here, the kernel will run on many, but not all,
-	  singleprocessor machines. On a singleprocessor machine, the kernel
-	  will run faster if you say N here.
-
-	  If you don't know what to do here, say N.
-
-config SCHED_SMT
-	bool "SMT (Hyperthreading) scheduler support"
-	depends on SMP
-	default n
-	help
-	  SMT scheduler support improves the CPU scheduler's decision making
-	  when dealing with Intel Pentium 4 chips with HyperThreading at a
-	  cost of slightly increased overhead in some places. If unsure say
-	  N here.
-
-config SCHED_MC
-	bool "Multi-core scheduler support"
-	depends on SMP
-	default y
-	help
-	  Multi-core scheduler support improves the CPU scheduler's decision
-	  making when dealing with multi-core CPU chips at a cost of slightly
-	  increased overhead in some places. If unsure say N here.
-
-source "kernel/Kconfig.preempt"
-
-config NUMA
-       bool "Non Uniform Memory Access (NUMA) Support"
-       depends on SMP
-       help
-	 Enable NUMA (Non Uniform Memory Access) support. The kernel 
-	 will try to allocate memory used by a CPU on the local memory 
-	 controller of the CPU and add some more NUMA awareness to the kernel.
-	 This code is recommended on all multiprocessor Opteron systems.
-	 If the system is EM64T, you should say N unless your system is EM64T 
-	 NUMA. 
-
-config K8_NUMA
-       bool "Old style AMD Opteron NUMA detection"
-       depends on NUMA && PCI
-       default y
-       help
-	 Enable K8 NUMA node topology detection.  You should say Y here if
-	 you have a multi processor AMD K8 system. This uses an old
-	 method to read the NUMA configuration directly from the builtin
-	 Northbridge of Opteron. It is recommended to use X86_64_ACPI_NUMA
-	 instead, which also takes priority if both are compiled in.   
-
-config NODES_SHIFT
-	int
-	default "6"
-	depends on NEED_MULTIPLE_NODES
-
-# Dummy CONFIG option to select ACPI_NUMA from drivers/acpi/Kconfig.
-
-config X86_64_ACPI_NUMA
-       bool "ACPI NUMA detection"
-       depends on NUMA
-       select ACPI 
-	select PCI
-       select ACPI_NUMA
-       default y
-       help
-	 Enable ACPI SRAT based node topology detection.
-
-config NUMA_EMU
-	bool "NUMA emulation"
-	depends on NUMA
-	help
-	  Enable NUMA emulation. A flat machine will be split
-	  into virtual nodes when booted with "numa=fake=N", where N is the
-	  number of nodes. This is only useful for debugging.
-
-config ARCH_DISCONTIGMEM_ENABLE
-       bool
-       depends on NUMA
-       default y
-
-config ARCH_DISCONTIGMEM_DEFAULT
-	def_bool y
-	depends on NUMA
-
-config ARCH_SPARSEMEM_ENABLE
-	def_bool y
-	depends on (NUMA || EXPERIMENTAL)
-	select SPARSEMEM_VMEMMAP_ENABLE
-
-config ARCH_MEMORY_PROBE
-	def_bool y
-	depends on MEMORY_HOTPLUG
-
-config ARCH_FLATMEM_ENABLE
-	def_bool y
-	depends on !NUMA
-
-source "mm/Kconfig"
-
-config MEMORY_HOTPLUG_RESERVE
-	def_bool y
-	depends on (MEMORY_HOTPLUG && DISCONTIGMEM)
-
-config HAVE_ARCH_EARLY_PFN_TO_NID
-	def_bool y
-	depends on NUMA
-
-config OUT_OF_LINE_PFN_TO_PAGE
-	def_bool y
-	depends on DISCONTIGMEM
-
-config NR_CPUS
-	int "Maximum number of CPUs (2-255)"
-	range 2 255
-	depends on SMP
-	default "8"
-	help
-	  This allows you to specify the maximum number of CPUs which this
-	  kernel will support. Current maximum is 255 CPUs due to
-	  APIC addressing limits. Less depending on the hardware.
-
-	  This is purely to save memory - each supported CPU requires
-	  memory in the static kernel configuration.
-
-config PHYSICAL_ALIGN
-	hex
-	default "0x200000"
-
-config HOTPLUG_CPU
-	bool "Support for suspend on SMP and hot-pluggable CPUs (EXPERIMENTAL)"
-	depends on SMP && HOTPLUG && EXPERIMENTAL
-	help
-		Say Y here to experiment with turning CPUs off and on.  CPUs
-		can be controlled through /sys/devices/system/cpu/cpu#.
-		This is also required for suspend/hibernation on SMP systems.
-
-		Say N if you want to disable CPU hotplug and don't need to
-		suspend.
-
-config ARCH_ENABLE_MEMORY_HOTPLUG
-	def_bool y
-
-config HPET_TIMER
-	bool
-	default y
-	help
-	  Use the IA-PC HPET (High Precision Event Timer) to manage
-	  time in preference to the PIT and RTC, if a HPET is
-	  present.  The HPET provides a stable time base on SMP
-	  systems, unlike the TSC, but it is more expensive to access,
-	  as it is off-chip.  You can find the HPET spec at
-	  <http://www.intel.com/hardwaredesign/hpetspec.htm>.
-
-config HPET_EMULATE_RTC
-	bool
-	depends on HPET_TIMER && RTC=y
-	default y
-
-# Mark as embedded because too many people got it wrong.
-# The code disables itself when not needed.
-config GART_IOMMU
-	bool "GART IOMMU support" if EMBEDDED
-	default y
-	select SWIOTLB
-	select AGP
-	depends on PCI
-	help
-	  Support for full DMA access of devices with 32bit memory access only
-	  on systems with more than 3GB. This is usually needed for USB,
-	  sound, many IDE/SATA chipsets and some other devices.
-	  Provides a driver for the AMD Athlon64/Opteron/Turion/Sempron GART
-	  based hardware IOMMU and a software bounce buffer based IOMMU used
-	  on Intel systems and as fallback.
-	  The code is only active when needed (enough memory and limited
-	  device) unless CONFIG_IOMMU_DEBUG or iommu=force is specified
-	  too.
-
-config CALGARY_IOMMU
-	bool "IBM Calgary IOMMU support"
-	select SWIOTLB
-	depends on PCI && EXPERIMENTAL
-	help
-	  Support for hardware IOMMUs in IBM's xSeries x366 and x460
-	  systems. Needed to run systems with more than 3GB of memory
-	  properly with 32-bit PCI devices that do not support DAC
-	  (Double Address Cycle). Calgary also supports bus level
-	  isolation, where all DMAs pass through the IOMMU.  This
-	  prevents them from going anywhere except their intended
-	  destination. This catches hard-to-find kernel bugs and
-	  mis-behaving drivers and devices that do not use the DMA-API
-	  properly to set up their DMA buffers.  The IOMMU can be
-	  turned off at boot time with the iommu=off parameter.
-	  Normally the kernel will make the right choice by itself.
-	  If unsure, say Y.
-
-config CALGARY_IOMMU_ENABLED_BY_DEFAULT
-	bool "Should Calgary be enabled by default?"
-	default y
-	depends on CALGARY_IOMMU
-	help
-	  Should Calgary be enabled by default? if you choose 'y', Calgary
-	  will be used (if it exists). If you choose 'n', Calgary will not be
-	  used even if it exists. If you choose 'n' and would like to use
-	  Calgary anyway, pass 'iommu=calgary' on the kernel command line.
-	  If unsure, say Y.
-
-# need this always selected by IOMMU for the VIA workaround
-config SWIOTLB
-	bool
-	help
-	  Support for software bounce buffers used on x86-64 systems
-	  which don't have a hardware IOMMU (e.g. the current generation
-	  of Intel's x86-64 CPUs). Using this PCI devices which can only
-	  access 32-bits of memory can be used on systems with more than
-	  3 GB of memory. If unsure, say Y.
-
-config X86_MCE
-	bool "Machine check support" if EMBEDDED
-	default y
-	help
-	   Include a machine check error handler to report hardware errors.
-	   This version will require the mcelog utility to decode some
-	   machine check error logs. See
-	   ftp://ftp.x86-64.org/pub/linux/tools/mcelog
-
-config X86_MCE_INTEL
-	bool "Intel MCE features"
-	depends on X86_MCE && X86_LOCAL_APIC
-	default y
-	help
-	   Additional support for intel specific MCE features such as
-	   the thermal monitor.
-
-config X86_MCE_AMD
-	bool "AMD MCE features"
-	depends on X86_MCE && X86_LOCAL_APIC
-	default y
-	help
-	   Additional support for AMD specific MCE features such as
-	   the DRAM Error Threshold.
-
-config KEXEC
-	bool "kexec system call"
-	help
-	  kexec is a system call that implements the ability to shutdown your
-	  current kernel, and to start another kernel.  It is like a reboot
-	  but it is independent of the system firmware.   And like a reboot
-	  you can start any kernel with it, not just Linux.
-
-	  The name comes from the similarity to the exec system call.
-
-	  It is an ongoing process to be certain the hardware in a machine
-	  is properly shutdown, so do not be surprised if this code does not
-	  initially work for you.  It may help to enable device hotplugging
-	  support.  As of this writing the exact hardware interface is
-	  strongly in flux, so no good recommendation can be made.
-
-config CRASH_DUMP
-	bool "kernel crash dumps (EXPERIMENTAL)"
-	depends on EXPERIMENTAL
-	help
-	  Generate crash dump after being started by kexec.
-	  This should be normally only set in special crash dump kernels
-	  which are loaded in the main kernel with kexec-tools into
-	  a specially reserved region and then later executed after
-	  a crash by kdump/kexec. The crash dump kernel must be compiled
-	  to a memory address not used by the main kernel or BIOS using
-	  PHYSICAL_START, or it must be built as a relocatable image
-	  (CONFIG_RELOCATABLE=y).
-	  For more details see Documentation/kdump/kdump.txt
-
-config RELOCATABLE
-	bool "Build a relocatable kernel (EXPERIMENTAL)"
-	depends on EXPERIMENTAL
-	help
-	  Builds a relocatable kernel. This enables loading and running
-	  a kernel binary from a different physical address than it has
-	  been compiled for.
-
-	  One use is for the kexec on panic case where the recovery kernel
-	  must live at a different physical address than the primary
-	  kernel.
-
-	  Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
-	  it has been loaded at and the compile time physical address
-	  (CONFIG_PHYSICAL_START) is ignored.
-
-config PHYSICAL_START
-	hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP)
-	default "0x200000"
-	help
-	  This gives the physical address where the kernel is loaded. It
-	  should be aligned to 2MB boundary.
-
-	  If kernel is a not relocatable (CONFIG_RELOCATABLE=n) then
-	  bzImage will decompress itself to above physical address and
-	  run from there. Otherwise, bzImage will run from the address where
-	  it has been loaded by the boot loader and will ignore above physical
-	  address.
-
-	  In normal kdump cases one does not have to set/change this option
-	  as now bzImage can be compiled as a completely relocatable image
-	  (CONFIG_RELOCATABLE=y) and be used to load and run from a different
-	  address. This option is mainly useful for the folks who don't want
-	  to use a bzImage for capturing the crash dump and want to use a
-	  vmlinux instead.
-
-	  So if you are using bzImage for capturing the crash dump, leave
-	  the value here unchanged to 0x200000 and set CONFIG_RELOCATABLE=y.
-	  Otherwise if you plan to use vmlinux for capturing the crash dump
-	  change this value to start of the reserved region (Typically 16MB
-	  0x1000000). In other words, it can be set based on the "X" value as
-	  specified in the "crashkernel=YM@XM" command line boot parameter
-	  passed to the panic-ed kernel. Typically this parameter is set as
-	  crashkernel=64M@16M. Please take a look at
-	  Documentation/kdump/kdump.txt for more details about crash dumps.
-
-	  Usage of bzImage for capturing the crash dump is advantageous as
-	  one does not have to build two kernels. Same kernel can be used
-	  as production kernel and capture kernel.
-
-	  Don't change this unless you know what you are doing.
-
-config SECCOMP
-	bool "Enable seccomp to safely compute untrusted bytecode"
-	depends on PROC_FS
-	default y
-	help
-	  This kernel feature is useful for number crunching applications
-	  that may need to compute untrusted bytecode during their
-	  execution. By using pipes or other transports made available to
-	  the process as file descriptors supporting the read/write
-	  syscalls, it's possible to isolate those applications in
-	  their own address space using seccomp. Once seccomp is
-	  enabled via /proc/<pid>/seccomp, it cannot be disabled
-	  and the task is only allowed to execute a few safe syscalls
-	  defined by each seccomp mode.
-
-	  If unsure, say Y. Only embedded should say N here.
-
-config CC_STACKPROTECTOR
-	bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
-	depends on EXPERIMENTAL
-	help
-         This option turns on the -fstack-protector GCC feature. This
-	  feature puts, at the beginning of critical functions, a canary
-	  value on the stack just before the return address, and validates
-	  the value just before actually returning.  Stack based buffer
-	  overflows (that need to overwrite this return address) now also
-	  overwrite the canary, which gets detected and the attack is then
-	  neutralized via a kernel panic.
-
-	  This feature requires gcc version 4.2 or above, or a distribution
-	  gcc with the feature backported. Older versions are automatically
-	  detected and for those versions, this configuration option is ignored.
-
-config CC_STACKPROTECTOR_ALL
-	bool "Use stack-protector for all functions"
-	depends on CC_STACKPROTECTOR
-	help
-	  Normally, GCC only inserts the canary value protection for
-	  functions that use large-ish on-stack buffers. By enabling
-	  this option, GCC will be asked to do this for ALL functions.
-
-source kernel/Kconfig.hz
-
-config K8_NB
-	def_bool y
-	depends on AGP_AMD64 || GART_IOMMU || (PCI && NUMA)
-
-endmenu
-
-#
-# Use the generic interrupt handling code in kernel/irq/:
-#
-config GENERIC_HARDIRQS
-	bool
-	default y
-
-config GENERIC_IRQ_PROBE
-	bool
-	default y
-
-# we have no ISA slots, but we do have ISA-style DMA.
-config ISA_DMA_API
-	bool
-	default y
-
-config GENERIC_PENDING_IRQ
-	bool
-	depends on GENERIC_HARDIRQS && SMP
-	default y
-
-menu "Power management options"
-
-source kernel/power/Kconfig
-
-config ARCH_HIBERNATION_HEADER
-	bool
-	depends on HIBERNATION
-	default y
-
-source "drivers/acpi/Kconfig"
-
-source "arch/x86/kernel/cpu/cpufreq/Kconfig_64"
-
-source "drivers/cpuidle/Kconfig"
-
-endmenu
-
-menu "Bus options (PCI etc.)"
-
-config PCI
-	bool "PCI support"
-	select ARCH_SUPPORTS_MSI if (X86_LOCAL_APIC && X86_IO_APIC)
-
-# x86-64 doesn't support PCI BIOS access from long mode so always go direct.
-config PCI_DIRECT
-	bool
-	depends on PCI
-	default y
-
-config PCI_MMCONFIG
-	bool "Support mmconfig PCI config space access"
-	depends on PCI && ACPI
-
-config PCI_DOMAINS
-	bool
-	depends on PCI
-	default y
-
-config DMAR
-	bool "Support for DMA Remapping Devices (EXPERIMENTAL)"
-	depends on PCI_MSI && ACPI && EXPERIMENTAL
-	help
-	  DMA remapping (DMAR) devices support enables independent address
-	  translations for Direct Memory Access (DMA) from devices.
-	  These DMA remapping devices are reported via ACPI tables
-	  and include PCI device scope covered by these DMA
-	  remapping devices.
-
-config DMAR_GFX_WA
-	bool "Support for Graphics workaround"
-	depends on DMAR
-	default y
-	help
-	 Current Graphics drivers tend to use physical address
-	 for DMA and avoid using DMA APIs. Setting this config
-	 option permits the IOMMU driver to set a unity map for
-	 all the OS-visible memory. Hence the driver can continue
-	 to use physical addresses for DMA.
-
-config DMAR_FLOPPY_WA
-	bool
-	depends on DMAR
-	default y
-	help
-	 Floppy disk drivers are know to bypass DMA API calls
-	 thereby failing to work when IOMMU is enabled. This
-	 workaround will setup a 1:1 mapping for the first
-	 16M to make floppy (an ISA device) work.
-
-source "drivers/pci/pcie/Kconfig"
-
-source "drivers/pci/Kconfig"
-
-source "drivers/pcmcia/Kconfig"
-
-source "drivers/pci/hotplug/Kconfig"
-
-endmenu
-
-
-menu "Executable file formats / Emulations"
-
-source "fs/Kconfig.binfmt"
-
-config IA32_EMULATION
-	bool "IA32 Emulation"
-	help
-	  Include code to run 32-bit programs under a 64-bit kernel. You should
-	  likely turn this on, unless you're 100% sure that you don't have any
-	  32-bit programs left.
-
-config IA32_AOUT
-       tristate "IA32 a.out support"
-       depends on IA32_EMULATION
-       help
-         Support old a.out binaries in the 32bit emulation.
-
-config COMPAT
-	bool
-	depends on IA32_EMULATION
-	default y
-
-config COMPAT_FOR_U64_ALIGNMENT
-	def_bool COMPAT
-
-config SYSVIPC_COMPAT
-	bool
-	depends on COMPAT && SYSVIPC
-	default y
-
-endmenu
-
-source "net/Kconfig"
-
-source drivers/Kconfig
-
-source "drivers/firmware/Kconfig"
-
-source fs/Kconfig
-
-source "kernel/Kconfig.instrumentation"
-
-source "arch/x86/Kconfig.debug"
-
-source "security/Kconfig"
-
-source "crypto/Kconfig"
-
-source "lib/Kconfig"

arch/x86/Makefile

@@ -1,12 +1,16 @@
 # Unified Makefile for i386 and x86_64
 
 # select defconfig based on actual architecture
-KBUILD_DEFCONFIG := $(ARCH)_defconfig
+ifeq ($(ARCH),x86)
+        KBUILD_DEFCONFIG := i386_defconfig
+else
+        KBUILD_DEFCONFIG := $(ARCH)_defconfig
+endif
 
-# # No need to remake these files
+# No need to remake these files
 $(srctree)/arch/x86/Makefile%: ;
 
-ifeq ($(ARCH),i386)
+ifeq ($(CONFIG_X86_32),y)
         include $(srctree)/arch/x86/Makefile_32
 else
         include $(srctree)/arch/x86/Makefile_64

arch/x86/Makefile_32

@@ -160,7 +160,7 @@ archclean:
 	$(Q)$(MAKE) $(clean)=arch/x86/boot
 
 define archhelp
-  echo  '* bzImage	- Compressed kernel image (arch/$(ARCH)/boot/bzImage)'
+  echo  '* bzImage	- Compressed kernel image (arch/x86/boot/bzImage)'
   echo  '  install	- Install kernel using'
   echo  '		   (your) ~/bin/installkernel or'
   echo  '		   (distribution) /sbin/installkernel or'
@@ -170,6 +170,6 @@ define archhelp
   echo  '  isoimage     - Create a boot CD-ROM image'
 endef
 
-CLEAN_FILES += arch/$(ARCH)/boot/fdimage \
-	       arch/$(ARCH)/boot/image.iso \
-	       arch/$(ARCH)/boot/mtools.conf
+CLEAN_FILES += arch/x86/boot/fdimage \
+	       arch/x86/boot/image.iso \
+	       arch/x86/boot/mtools.conf

arch/x86/Makefile_64

@@ -127,7 +127,7 @@ archclean:
 	$(Q)$(MAKE) $(clean)=$(boot)
 
 define archhelp
-  echo  '* bzImage	- Compressed kernel image (arch/$(ARCH)/boot/bzImage)'
+  echo  '* bzImage	- Compressed kernel image (arch/x86/boot/bzImage)'
   echo  '  install	- Install kernel using'
   echo  '		   (your) ~/bin/installkernel or'
   echo  '		   (distribution) /sbin/installkernel or'
@@ -137,8 +137,8 @@ define archhelp
   echo  '  isoimage     - Create a boot CD-ROM image'
 endef
 
-CLEAN_FILES += arch/$(ARCH)/boot/fdimage \
-	       arch/$(ARCH)/boot/image.iso \
-	       arch/$(ARCH)/boot/mtools.conf
+CLEAN_FILES += arch/x86/boot/fdimage \
+	       arch/x86/boot/image.iso \
+	       arch/x86/boot/mtools.conf
 
 

arch/x86/boot/Makefile

@@ -49,10 +49,10 @@ HOSTCFLAGS_build.o := $(LINUXINCLUDE)
 
 # How to compile the 16-bit code.  Note we always compile for -march=i386,
 # that way we can complain to the user if the CPU is insufficient.
-cflags-i386   := 
-cflags-x86_64 := -m32
+cflags-$(CONFIG_X86_32) :=
+cflags-$(CONFIG_X86_64) := -m32
 KBUILD_CFLAGS	:= $(LINUXINCLUDE) -g -Os -D_SETUP -D__KERNEL__ \
-		   $(cflags-$(ARCH)) \
+		   $(cflags-y) \
 		   -Wall -Wstrict-prototypes \
 		   -march=i386 -mregparm=3 \
 		   -include $(srctree)/$(src)/code16gcc.h \

arch/x86/boot/cpucheck.c

@@ -42,13 +42,7 @@ static struct cpu_features cpu;
 static u32 cpu_vendor[3];
 static u32 err_flags[NCAPINTS];
 
-#ifdef CONFIG_X86_64
-static const int req_level = 64;
-#elif defined(CONFIG_X86_MINIMUM_CPU_FAMILY)
 static const int req_level = CONFIG_X86_MINIMUM_CPU_FAMILY;
-#else
-static const int req_level = 3;
-#endif
 
 static const u32 req_flags[NCAPINTS] =
 {

arch/x86/kernel/Makefile_32

@@ -3,6 +3,7 @@
 #
 
 extra-y := head_32.o init_task.o vmlinux.lds
+CPPFLAGS_vmlinux.lds += -Ui386
 
 obj-y	:= process_32.o signal_32.o entry_32.o traps_32.o irq_32.o \
 		ptrace_32.o time_32.o ioport_32.o ldt_32.o setup_32.o i8259_32.o sys_i386_32.o \
@@ -60,7 +61,7 @@ quiet_cmd_syscall = SYSCALL $@
       cmd_syscall = $(CC) -m elf_i386 -nostdlib $(SYSCFLAGS_$(@F)) \
 		          -Wl,-T,$(filter-out FORCE,$^) -o $@
 
-export CPPFLAGS_vsyscall_32.lds += -P -C -U$(ARCH)
+export CPPFLAGS_vsyscall_32.lds += -P -C -Ui386
 
 vsyscall-flags = -shared -s -Wl,-soname=linux-gate.so.1 \
 		 $(call ld-option, -Wl$(comma)--hash-style=sysv)

arch/x86/kernel/Makefile_64

@@ -3,7 +3,9 @@
 #
 
 extra-y 	:= head_64.o head64.o init_task.o vmlinux.lds
+CPPFLAGS_vmlinux.lds += -Ux86_64
 EXTRA_AFLAGS	:= -traditional
+
 obj-y	:= process_64.o signal_64.o entry_64.o traps_64.o irq_64.o \
 		ptrace_64.o time_64.o ioport_64.o ldt_64.o setup_64.o i8259_64.o sys_x86_64.o \
 		x8664_ksyms_64.o i387_64.o syscall_64.o vsyscall_64.o \

arch/x86/kernel/cpu/cpufreq/Kconfig_32 → arch/x86/kernel/cpu/cpufreq/Kconfig

@@ -19,6 +19,9 @@ config X86_ACPI_CPUFREQ
 	  Processor Performance States.
 	  This driver also supports Intel Enhanced Speedstep.
 
+	  To compile this driver as a module, choose M here: the
+	  module will be called acpi-cpufreq.
+
 	  For details, take a look at <file:Documentation/cpu-freq/>.
 
 	  If in doubt, say N.
@@ -26,7 +29,7 @@ config X86_ACPI_CPUFREQ
 config ELAN_CPUFREQ
 	tristate "AMD Elan SC400 and SC410"
 	select CPU_FREQ_TABLE
-	depends on X86_ELAN
+	depends on X86_32 && X86_ELAN
 	---help---
 	  This adds the CPUFreq driver for AMD Elan SC400 and SC410
 	  processors.
@@ -42,7 +45,7 @@ config ELAN_CPUFREQ
 config SC520_CPUFREQ
 	tristate "AMD Elan SC520"
 	select CPU_FREQ_TABLE
-	depends on X86_ELAN
+	depends on X86_32 && X86_ELAN
 	---help---
 	  This adds the CPUFreq driver for AMD Elan SC520 processor.
 
@@ -54,6 +57,7 @@ config SC520_CPUFREQ
 config X86_POWERNOW_K6
 	tristate "AMD Mobile K6-2/K6-3 PowerNow!"
 	select CPU_FREQ_TABLE
+	depends on X86_32
 	help
 	  This adds the CPUFreq driver for mobile AMD K6-2+ and mobile
 	  AMD K6-3+ processors.
@@ -65,6 +69,7 @@ config X86_POWERNOW_K6
 config X86_POWERNOW_K7
 	tristate "AMD Mobile Athlon/Duron PowerNow!"
 	select CPU_FREQ_TABLE
+	depends on X86_32
 	help
 	  This adds the CPUFreq driver for mobile AMD K7 mobile processors.
 
@@ -76,23 +81,27 @@ config X86_POWERNOW_K7_ACPI
 	bool
 	depends on X86_POWERNOW_K7 && ACPI_PROCESSOR
 	depends on !(X86_POWERNOW_K7 = y && ACPI_PROCESSOR = m)
+	depends on X86_32
 	default y
 
 config X86_POWERNOW_K8
 	tristate "AMD Opteron/Athlon64 PowerNow!"
 	select CPU_FREQ_TABLE
-	depends on EXPERIMENTAL
 	help
 	  This adds the CPUFreq driver for mobile AMD Opteron/Athlon64 processors.
 
+	  To compile this driver as a module, choose M here: the
+	  module will be called powernow-k8.
+
 	  For details, take a look at <file:Documentation/cpu-freq/>.
 
 	  If in doubt, say N.
 
 config X86_POWERNOW_K8_ACPI
-	bool "ACPI Support"
-	select ACPI_PROCESSOR
-	depends on ACPI && X86_POWERNOW_K8
+	bool
+	prompt "ACPI Support" if X86_32
+	depends on ACPI && X86_POWERNOW_K8 && ACPI_PROCESSOR
+	depends on !(X86_POWERNOW_K8 = y && ACPI_PROCESSOR = m)
 	default y
 	help
 	  This provides access to the K8s Processor Performance States via ACPI.
@@ -104,7 +113,7 @@ config X86_POWERNOW_K8_ACPI
 
 config X86_GX_SUSPMOD
 	tristate "Cyrix MediaGX/NatSemi Geode Suspend Modulation"
-	depends on PCI
+	depends on X86_32 && PCI
 	help
 	 This add the CPUFreq driver for NatSemi Geode processors which
 	 support suspend modulation.
@@ -114,15 +123,20 @@ config X86_GX_SUSPMOD
 	 If in doubt, say N.
 
 config X86_SPEEDSTEP_CENTRINO
-	tristate "Intel Enhanced SpeedStep"
+	tristate "Intel Enhanced SpeedStep (deprecated)"
 	select CPU_FREQ_TABLE
-	select X86_SPEEDSTEP_CENTRINO_TABLE
+	select X86_SPEEDSTEP_CENTRINO_TABLE if X86_32
+	depends on X86_32 || (X86_64 && ACPI_PROCESSOR)
 	help
+	  This is deprecated and this functionality is now merged into
+	  acpi_cpufreq (X86_ACPI_CPUFREQ). Use that driver instead of
+	  speedstep_centrino.
 	  This adds the CPUFreq driver for Enhanced SpeedStep enabled
-	  mobile CPUs.  This means Intel Pentium M (Centrino) CPUs. However,
-	  you also need to say Y to "Use ACPI tables to decode..." below
-	  [which might imply enabling ACPI] if you want to use this driver
-	  on non-Banias CPUs.
+	  mobile CPUs.  This means Intel Pentium M (Centrino) CPUs
+	  or 64bit enabled Intel Xeons.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called speedstep-centrino.
 
 	  For details, take a look at <file:Documentation/cpu-freq/>.
 
@@ -130,7 +144,7 @@ config X86_SPEEDSTEP_CENTRINO
 
 config X86_SPEEDSTEP_CENTRINO_TABLE
 	bool "Built-in tables for Banias CPUs"
-	depends on X86_SPEEDSTEP_CENTRINO
+	depends on X86_32 && X86_SPEEDSTEP_CENTRINO
 	default y
 	help
 	  Use built-in tables for Banias CPUs if ACPI encoding
@@ -141,6 +155,7 @@ config X86_SPEEDSTEP_CENTRINO_TABLE
 config X86_SPEEDSTEP_ICH
 	tristate "Intel Speedstep on ICH-M chipsets (ioport interface)"
 	select CPU_FREQ_TABLE
+	depends on X86_32
 	help
 	  This adds the CPUFreq driver for certain mobile Intel Pentium III
 	  (Coppermine), all mobile Intel Pentium III-M (Tualatin) and all
@@ -154,7 +169,7 @@ config X86_SPEEDSTEP_ICH
 config X86_SPEEDSTEP_SMI
 	tristate "Intel SpeedStep on 440BX/ZX/MX chipsets (SMI interface)"
 	select CPU_FREQ_TABLE
-	depends on EXPERIMENTAL
+	depends on X86_32 && EXPERIMENTAL
 	help
 	  This adds the CPUFreq driver for certain mobile Intel Pentium III
 	  (Coppermine), all mobile Intel Pentium III-M (Tualatin)
@@ -169,15 +184,24 @@ config X86_P4_CLOCKMOD
 	select CPU_FREQ_TABLE
 	help
 	  This adds the CPUFreq driver for Intel Pentium 4 / XEON
-	  processors.
+	  processors.  When enabled it will lower CPU temperature by skipping
+	  clocks.
+
+	  This driver should be only used in exceptional
+	  circumstances when very low power is needed because it causes severe
+	  slowdowns and noticeable latencies.  Normally Speedstep should be used
+	  instead.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called p4-clockmod.
 
 	  For details, take a look at <file:Documentation/cpu-freq/>.
 
-	  If in doubt, say N.
+	  Unless you are absolutely sure say N.
 
 config X86_CPUFREQ_NFORCE2
 	tristate "nVidia nForce2 FSB changing"
-	depends on EXPERIMENTAL
+	depends on X86_32 && EXPERIMENTAL
 	help
 	  This adds the CPUFreq driver for FSB changing on nVidia nForce2
 	  platforms.
@@ -188,6 +212,7 @@ config X86_CPUFREQ_NFORCE2
 
 config X86_LONGRUN
 	tristate "Transmeta LongRun"
+	depends on X86_32
 	help
 	  This adds the CPUFreq driver for Transmeta Crusoe and Efficeon processors
 	  which support LongRun.
@@ -199,7 +224,7 @@ config X86_LONGRUN
 config X86_LONGHAUL
 	tristate "VIA Cyrix III Longhaul"
 	select CPU_FREQ_TABLE
-	depends on ACPI_PROCESSOR
+	depends on X86_32 && ACPI_PROCESSOR
 	help
 	  This adds the CPUFreq driver for VIA Samuel/CyrixIII,
 	  VIA Cyrix Samuel/C3, VIA Cyrix Ezra and VIA Cyrix Ezra-T
@@ -212,7 +237,7 @@ config X86_LONGHAUL
 config X86_E_POWERSAVER
 	tristate "VIA C7 Enhanced PowerSaver (EXPERIMENTAL)"
 	select CPU_FREQ_TABLE
-	depends on EXPERIMENTAL
+	depends on X86_32 && EXPERIMENTAL
 	help
 	  This adds the CPUFreq driver for VIA C7 processors.
 
@@ -233,11 +258,11 @@ config X86_ACPI_CPUFREQ_PROC_INTF
 
 config X86_SPEEDSTEP_LIB
 	tristate
-	default X86_SPEEDSTEP_ICH || X86_SPEEDSTEP_SMI || X86_P4_CLOCKMOD
+	default (X86_SPEEDSTEP_ICH || X86_SPEEDSTEP_SMI || X86_P4_CLOCKMOD)
 
 config X86_SPEEDSTEP_RELAXED_CAP_CHECK
 	bool "Relaxed speedstep capability checks"
-	depends on (X86_SPEEDSTEP_SMI || X86_SPEEDSTEP_ICH)
+	depends on X86_32 && (X86_SPEEDSTEP_SMI || X86_SPEEDSTEP_ICH)
 	help
 	  Don't perform all checks for a speedstep capable system which would
 	  normally be done. Some ancient or strange systems, though speedstep

arch/x86/kernel/cpu/cpufreq/Kconfig_64

@@ -1,108 +0,0 @@
-#
-# CPU Frequency scaling
-#
-
-menu "CPU Frequency scaling"
-
-source "drivers/cpufreq/Kconfig"
-
-if CPU_FREQ
-
-comment "CPUFreq processor drivers"
-
-config X86_POWERNOW_K8
-	tristate "AMD Opteron/Athlon64 PowerNow!"
-	select CPU_FREQ_TABLE
-	help
-	  This adds the CPUFreq driver for mobile AMD Opteron/Athlon64 processors.
-
-	  To compile this driver as a module, choose M here: the
-	  module will be called powernow-k8.
-
-	  For details, take a look at <file:Documentation/cpu-freq/>.
-
-	  If in doubt, say N.
-
-config X86_POWERNOW_K8_ACPI
-	bool
-	depends on X86_POWERNOW_K8 && ACPI_PROCESSOR
-	depends on !(X86_POWERNOW_K8 = y && ACPI_PROCESSOR = m)
-	default y
-
-config X86_SPEEDSTEP_CENTRINO
-	tristate "Intel Enhanced SpeedStep (deprecated)"
-	select CPU_FREQ_TABLE
-	depends on ACPI_PROCESSOR
-	help
-	  This is deprecated and this functionality is now merged into
-	  acpi_cpufreq (X86_ACPI_CPUFREQ). Use that driver instead of
-	  speedstep_centrino.
-	  This adds the CPUFreq driver for Enhanced SpeedStep enabled
-	  mobile CPUs.  This means Intel Pentium M (Centrino) CPUs
-	  or 64bit enabled Intel Xeons.
-
-	  To compile this driver as a module, choose M here: the
-	  module will be called speedstep-centrino.
-
-	  For details, take a look at <file:Documentation/cpu-freq/>.
-
-	  If in doubt, say N.
-
-config X86_ACPI_CPUFREQ
-	tristate "ACPI Processor P-States driver"
-	select CPU_FREQ_TABLE
-	depends on ACPI_PROCESSOR
-	help
-	  This driver adds a CPUFreq driver which utilizes the ACPI
-	  Processor Performance States.
-	  This driver also supports Intel Enhanced Speedstep.
-
-	  To compile this driver as a module, choose M here: the
-	  module will be called acpi-cpufreq.
-
-	  For details, take a look at <file:Documentation/cpu-freq/>.
-
-	  If in doubt, say N.
-
-comment "shared options"
-
-config X86_ACPI_CPUFREQ_PROC_INTF
-	bool "/proc/acpi/processor/../performance interface (deprecated)"
-	depends on PROC_FS
-	depends on X86_ACPI_CPUFREQ || X86_POWERNOW_K8_ACPI
-	help
-	  This enables the deprecated /proc/acpi/processor/../performance
-	  interface. While it is helpful for debugging, the generic,
-	  cross-architecture cpufreq interfaces should be used.
-
-	  If in doubt, say N.
-
-config X86_P4_CLOCKMOD
-	tristate "Intel Pentium 4 clock modulation"
-	depends on EMBEDDED
-	select CPU_FREQ_TABLE
-	help
-	  This adds the clock modulation driver for Intel Pentium 4 / XEON
-	  processors.  When enabled it will lower CPU temperature by skipping
-	  clocks.
-
-	  This driver should be only used in exceptional
-	  circumstances when very low power is needed because it causes severe
-	  slowdowns and noticeable latencies.  Normally Speedstep should be used
-	  instead.
-
-	  To compile this driver as a module, choose M here: the
-	  module will be called p4-clockmod.
-
-	  For details, take a look at <file:Documentation/cpu-freq/>.
-
-	  Unless you are absolutely sure say N.
-
-
-config X86_SPEEDSTEP_LIB
-	tristate
-	default X86_P4_CLOCKMOD
-
-endif
-
-endmenu

arch/x86/vdso/Makefile

@@ -20,7 +20,7 @@ quiet_cmd_syscall = SYSCALL $@
       cmd_syscall = $(CC) -m elf_x86_64 -nostdlib $(SYSCFLAGS_$(@F)) \
 		          -Wl,-T,$(filter-out FORCE,$^) -o $@
 
-export CPPFLAGS_vdso.lds += -P -C -U$(ARCH)
+export CPPFLAGS_vdso.lds += -P -C
 
 vdso-flags = -fPIC -shared -Wl,-soname=linux-vdso.so.1 \
 		 $(call ld-option, -Wl$(comma)--hash-style=sysv) \

scripts/kconfig/Makefile

@@ -4,12 +4,7 @@
 
 PHONY += oldconfig xconfig gconfig menuconfig config silentoldconfig update-po-config
 
-# If a arch/$(SRCARCH)/Kconfig.$(ARCH) file exist use it
-ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/Kconfig.$(ARCH)),)
-        Kconfig := arch/$(SRCARCH)/Kconfig.$(ARCH)
-else
-        Kconfig := arch/$(SRCARCH)/Kconfig
-endif
+Kconfig := arch/$(SRCARCH)/Kconfig
 
 xconfig: $(obj)/qconf
 	$< $(Kconfig)

scripts/kconfig/conf.c

@@ -591,6 +591,7 @@ int main(int ac, char **av)
 			conf_read_simple(name, S_DEF_USER);
 		else if (!stat("all.config", &tmpstat))
 			conf_read_simple("all.config", S_DEF_USER);
+		conf_set_env_sym("K64BIT", "64BIT", S_DEF_USER);
 		break;
 	default:
 		break;

scripts/kconfig/confdata.c

@@ -83,6 +83,95 @@ char *conf_get_default_confname(void)
 	return name;
 }
 
+static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
+{
+	char *p2;
+
+	switch (sym->type) {
+	case S_TRISTATE:
+		if (p[0] == 'm') {
+			sym->def[def].tri = mod;
+			sym->flags |= def_flags;
+			break;
+		}
+	case S_BOOLEAN:
+		if (p[0] == 'y') {
+			sym->def[def].tri = yes;
+			sym->flags |= def_flags;
+			break;
+		}
+		if (p[0] == 'n') {
+			sym->def[def].tri = no;
+			sym->flags |= def_flags;
+			break;
+		}
+		conf_warning("symbol value '%s' invalid for %s", p, sym->name);
+		break;
+	case S_OTHER:
+		if (*p != '"') {
+			for (p2 = p; *p2 && !isspace(*p2); p2++)
+				;
+			sym->type = S_STRING;
+			goto done;
+		}
+	case S_STRING:
+		if (*p++ != '"')
+			break;
+		for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
+			if (*p2 == '"') {
+				*p2 = 0;
+				break;
+			}
+			memmove(p2, p2 + 1, strlen(p2));
+		}
+		if (!p2) {
+			conf_warning("invalid string found");
+			return 1;
+		}
+	case S_INT:
+	case S_HEX:
+	done:
+		if (sym_string_valid(sym, p)) {
+			sym->def[def].val = strdup(p);
+			sym->flags |= def_flags;
+		} else {
+			conf_warning("symbol value '%s' invalid for %s", p, sym->name);
+			return 1;
+		}
+		break;
+	default:
+		;
+	}
+	return 0;
+}
+
+/* Read an environment variable and assign the value to the symbol */
+int conf_set_env_sym(const char *env, const char *symname, int def)
+{
+	struct symbol *sym;
+	char *p;
+	int def_flags;
+
+	p = getenv(env);
+	if (p) {
+		char warning[200];
+		sprintf(warning, "Environment variable (%s = \"%s\")", env, p);
+		conf_filename = warning;
+		def_flags = SYMBOL_DEF << def;
+		if (def == S_DEF_USER) {
+			sym = sym_find(symname);
+			if (!sym)
+				return 1;
+		} else {
+			sym = sym_lookup(symname, 0);
+			if (sym->type == S_UNKNOWN)
+				sym->type = S_OTHER;
+		}
+		conf_set_sym_val(sym, def, def_flags, p);
+	}
+	return 0;
+}
+
 int conf_read_simple(const char *name, int def)
 {
 	FILE *in = NULL;
@@ -213,61 +302,8 @@ int conf_read_simple(const char *name, int def)
 				conf_warning("trying to reassign symbol %s", sym->name);
 				break;
 			}
-			switch (sym->type) {
-			case S_TRISTATE:
-				if (p[0] == 'm') {
-					sym->def[def].tri = mod;
-					sym->flags |= def_flags;
-					break;
-				}
-			case S_BOOLEAN:
-				if (p[0] == 'y') {
-					sym->def[def].tri = yes;
-					sym->flags |= def_flags;
-					break;
-				}
-				if (p[0] == 'n') {
-					sym->def[def].tri = no;
-					sym->flags |= def_flags;
-					break;
-				}
-				conf_warning("symbol value '%s' invalid for %s", p, sym->name);
-				break;
-			case S_OTHER:
-				if (*p != '"') {
-					for (p2 = p; *p2 && !isspace(*p2); p2++)
-						;
-					sym->type = S_STRING;
-					goto done;
-				}
-			case S_STRING:
-				if (*p++ != '"')
-					break;
-				for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
-					if (*p2 == '"') {
-						*p2 = 0;
-						break;
-					}
-					memmove(p2, p2 + 1, strlen(p2));
-				}
-				if (!p2) {
-					conf_warning("invalid string found");
-					continue;
-				}
-			case S_INT:
-			case S_HEX:
-			done:
-				if (sym_string_valid(sym, p)) {
-					sym->def[def].val = strdup(p);
-					sym->flags |= def_flags;
-				} else {
-					conf_warning("symbol value '%s' invalid for %s", p, sym->name);
-					continue;
-				}
-				break;
-			default:
-				;
-			}
+			if (conf_set_sym_val(sym, def, def_flags, p))
+				continue;
 			break;
 		case '\r':
 		case '\n':

scripts/kconfig/lkc_proto.h

@@ -1,6 +1,7 @@
 
 /* confdata.c */
 P(conf_parse,void,(const char *name));
+P(conf_set_env_sym,int,(const char *envname, const char *symname, int def));
 P(conf_read,int,(const char *name));
 P(conf_read_simple,int,(const char *name, int));
 P(conf_write,int,(const char *name));