15 files changed, 89 insertions, 101 deletions

diff --git a/Makefile b/Makefile
index 2a4729024dfb..8816060cdf40 100644
--- a/Makefile
+++ b/Makefile
@@ -196,6 +196,9 @@ 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))
+
 KCONFIG_CONFIG  ?= .config
 
 # SHELL used by kbuild
@@ -418,7 +421,7 @@ ifeq ($(config-targets),1)
 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
 # KBUILD_DEFCONFIG may point out an alternative default configuration
 # used for 'make defconfig'
-include $(srctree)/arch/$(ARCH)/Makefile
+include $(srctree)/arch/$(SRCARCH)/Makefile
 export KBUILD_DEFCONFIG
 
 config %config: scripts_basic outputmakefile FORCE
@@ -497,7 +500,7 @@ else
 KBUILD_CFLAGS   += -O2
 endif
 
-include $(srctree)/arch/$(ARCH)/Makefile
+include $(srctree)/arch/$(SRCARCH)/Makefile
 
 ifdef CONFIG_FRAME_POINTER
 KBUILD_CFLAGS   += -fno-omit-frame-pointer -fno-optimize-sibling-calls
diff --git a/arch/i386/.gitignore b/arch/i386/.gitignore
deleted file mode 100644
index 36ef4c374d25..000000000000
--- a/arch/i386/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-boot
diff --git a/arch/i386/Kconfig.cpu b/arch/x86/Kconfig.cpu
index 0e2adadf5905..0e2adadf5905 100644
--- a/arch/i386/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
diff --git a/arch/i386/Kconfig.debug b/arch/x86/Kconfig.debug
index f03531eacdfb..970b2defe7df 100644
--- a/arch/i386/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -1,14 +1,14 @@
 menu "Kernel hacking"
 
 config TRACE_IRQFLAGS_SUPPORT
-        bool
-        default y
+        def_bool y
 
 source "lib/Kconfig.debug"
 
 config EARLY_PRINTK
         bool "Early printk" if EMBEDDED && DEBUG_KERNEL
         default y
+        depends on X86_32
         help
           Write kernel log output directly into the VGA buffer or to a serial
           port.
@@ -37,10 +37,12 @@ config DEBUG_STACK_USAGE
 
 comment "Page alloc debug is incompatible with Software Suspend on i386"
         depends on DEBUG_KERNEL && HIBERNATION
+        depends on X86_32
 
 config DEBUG_PAGEALLOC
         bool "Debug page memory allocations"
         depends on DEBUG_KERNEL && !HIBERNATION && !HUGETLBFS
+        depends on X86_32
         help
           Unmap pages from the kernel linear mapping after free_pages().
           This results in a large slowdown, but helps to find certain types
@@ -59,6 +61,7 @@ config DEBUG_RODATA
 config 4KSTACKS
         bool "Use 4Kb for kernel stacks instead of 8Kb"
         depends on DEBUG_KERNEL
+        depends on X86_32
         help
           If you say Y here the kernel will use a 4Kb stacksize for the
           kernel stack attached to each process/thread. This facilitates
@@ -67,22 +70,50 @@ config 4KSTACKS
           will also use IRQ stacks to compensate for the reduced stackspace.
 
 config X86_FIND_SMP_CONFIG
-        bool
+        def_bool y
         depends on X86_LOCAL_APIC || X86_VOYAGER
-        default y
+        depends on X86_32
 
 config X86_MPPARSE
-        bool
+        def_bool y
         depends on X86_LOCAL_APIC && !X86_VISWS
-        default y
+        depends on X86_32
 
 config DOUBLEFAULT
         default y
         bool "Enable doublefault exception handler" if EMBEDDED
+        depends on X86_32
+        help
+          This option allows trapping of rare doublefault exceptions that
+          would otherwise cause a system to silently reboot. Disabling this
+          option saves about 4k and might cause you much additional grey
+          hair.
+
+config IOMMU_DEBUG
+        bool "Enable IOMMU debugging"
+        depends on IOMMU && DEBUG_KERNEL
+        depends on X86_64
         help
-          This option allows trapping of rare doublefault exceptions that
-          would otherwise cause a system to silently reboot. Disabling this
-          option saves about 4k and might cause you much additional grey
-          hair.
+          Force the IOMMU to on even when you have less than 4GB of
+          memory and add debugging code. On overflow always panic. And
+          allow to enable IOMMU leak tracing. Can be disabled at boot
+          time with iommu=noforce. This will also enable scatter gather
+          list merging.  Currently not recommended for production
+          code. When you use it make sure you have a big enough
+          IOMMU/AGP aperture.  Most of the options enabled by this can
+          be set more finegrained using the iommu= command line
+          options. See Documentation/x86_64/boot-options.txt for more
+          details.
+
+config IOMMU_LEAK
+        bool "IOMMU leak tracing"
+        depends on DEBUG_KERNEL
+        depends on IOMMU_DEBUG
+        help
+          Add a simple leak tracer to the IOMMU code. This is useful when you
+          are debugging a buggy device driver that leaks IOMMU mappings.
+
+#config X86_REMOTE_DEBUG
+#       bool "kgdb debugging stub"
 
 endmenu
diff --git a/arch/i386/Kconfig b/arch/x86/Kconfig.i386
index b4437ce0f973..7331efe891a7 100644
--- a/arch/i386/Kconfig
+++ b/arch/x86/Kconfig.i386
@@ -287,7 +287,7 @@ config ES7000_CLUSTERED_APIC
         default y
         depends on SMP && X86_ES7000 && MPENTIUMIII
 
-source "arch/i386/Kconfig.cpu"
+source "arch/x86/Kconfig.cpu"
 
 config HPET_TIMER
         bool "HPET Timer Support"
@@ -1272,7 +1272,7 @@ source "fs/Kconfig"
 
 source "kernel/Kconfig.instrumentation"
 
-source "arch/i386/Kconfig.debug"
+source "arch/x86/Kconfig.debug"
 
 source "security/Kconfig"
 
diff --git a/arch/x86_64/Kconfig b/arch/x86/Kconfig.x86_64
index 308970aa5382..e2542e5b536c 100644
--- a/arch/x86_64/Kconfig
+++ b/arch/x86/Kconfig.x86_64
@@ -835,7 +835,7 @@ source fs/Kconfig
 
 source "kernel/Kconfig.instrumentation"
 
-source "arch/x86_64/Kconfig.debug"
+source "arch/x86/Kconfig.debug"
 
 source "security/Kconfig"
 
diff --git a/arch/x86/Makefile b/arch/x86/Makefile
new file mode 100644
index 000000000000..309597386a77
--- /dev/null
+++ b/arch/x86/Makefile
@@ -0,0 +1,16 @@
+# Unified Makefile for i386 and x86_64
+
+# select defconfig based on actual architecture
+KBUILD_DEFCONFIG := $(ARCH)_defconfig
+
+# # No need to remake these files
+$(srctree)/arch/x86/Makefile%: ;
+
+ifeq ($(ARCH),i386)
+        include $(srctree)/arch/x86/Makefile_32
+else
+        include $(srctree)/arch/x86/Makefile_64
+endif
+
+
+
diff --git a/arch/i386/Makefile b/arch/x86/Makefile_32
index f5b9a37def8b..346ac0766875 100644
--- a/arch/i386/Makefile
+++ b/arch/x86/Makefile_32
@@ -1,5 +1,5 @@
 #
-# i386/Makefile
+# i386 Makefile
 #
 # This file is included by the global makefile so that you can add your own
 # architecture-specific flags and dependencies. Remember to do have actions
@@ -17,9 +17,6 @@
 # 20050320  Kianusch Sayah Karadji <kianusch@sk-tech.net>
 #           Added support for GEODE CPU
 
-# Fill in SRCARCH
-SRCARCH := x86
-
 # BITS is used as extension for files which are available in a 32 bit
 # and a 64 bit version to simplify shared Makefiles.
 # e.g.: obj-y += foo_$(BITS).o
@@ -46,7 +43,7 @@ KBUILD_CFLAGS += -pipe -msoft-float -mregparm=3 -freg-struct-return
 KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)
 
 # CPU-specific tuning. Anything which can be shared with UML should go here.
-include $(srctree)/arch/i386/Makefile.cpu
+include $(srctree)/arch/x86/Makefile_32.cpu
 
 # temporary until string.h is fixed
 cflags-y += -ffreestanding
diff --git a/arch/i386/Makefile.cpu b/arch/x86/Makefile_32.cpu
index e372b584e919..e372b584e919 100644
--- a/arch/i386/Makefile.cpu
+++ b/arch/x86/Makefile_32.cpu
diff --git a/arch/x86_64/Makefile b/arch/x86/Makefile_64
index 20eb69bd5a6d..57e714a47af7 100644
--- a/arch/x86_64/Makefile
+++ b/arch/x86/Makefile_64
@@ -1,5 +1,5 @@
 #
-# x86_64/Makefile
+# x86_64 Makefile
 #
 # This file is included by the global makefile so that you can add your own
 # architecture-specific flags and dependencies. Remember to do have actions
@@ -21,9 +21,6 @@
 #
 # $Id: Makefile,v 1.31 2002/03/22 15:56:07 ak Exp $
 
-# Fill in SRCARCH
-SRCARCH := x86
-
 # BITS is used as extension for files which are available in a 32 bit
 # and a 64 bit version to simplify shared Makefiles.
 # e.g.: obj-y += foo_$(BITS).o
diff --git a/arch/i386/defconfig b/arch/x86/configs/i386_defconfig
index 54ee1764fdae..54ee1764fdae 100644
--- a/arch/i386/defconfig
+++ b/arch/x86/configs/i386_defconfig
diff --git a/arch/x86_64/defconfig b/arch/x86/configs/x86_64_defconfig
index b091c5e35558..b091c5e35558 100644
--- a/arch/x86_64/defconfig
+++ b/arch/x86/configs/x86_64_defconfig
diff --git a/arch/x86_64/.gitignore b/arch/x86_64/.gitignore
deleted file mode 100644
index 36ef4c374d25..000000000000
--- a/arch/x86_64/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-boot
diff --git a/arch/x86_64/Kconfig.debug b/arch/x86_64/Kconfig.debug
deleted file mode 100644
index 775d211a5cf9..000000000000
--- a/arch/x86_64/Kconfig.debug
+++ /dev/null
@@ -1,61 +0,0 @@
-menu "Kernel hacking"
-
-config TRACE_IRQFLAGS_SUPPORT
-        bool
-        default y
-
-source "lib/Kconfig.debug"
-
-config DEBUG_RODATA
-       bool "Write protect kernel read-only data structures"
-       depends on DEBUG_KERNEL
-       help
-         Mark the kernel read-only data as write-protected in the pagetables,
-         in order to catch accidental (and incorrect) writes to such const data.
-         This option may have a slight performance impact because a portion
-         of the kernel code won't be covered by a 2MB TLB anymore.
-         If in doubt, say "N".
-
-config IOMMU_DEBUG
-       depends on IOMMU && DEBUG_KERNEL
-       bool "Enable IOMMU debugging"
-       help
-         Force the IOMMU to on even when you have less than 4GB of
-         memory and add debugging code. On overflow always panic. And
-         allow to enable IOMMU leak tracing. Can be disabled at boot
-         time with iommu=noforce. This will also enable scatter gather
-         list merging.  Currently not recommended for production
-         code. When you use it make sure you have a big enough
-         IOMMU/AGP aperture.  Most of the options enabled by this can
-         be set more finegrained using the iommu= command line
-         options. See Documentation/x86_64/boot-options.txt for more
-         details.
-
-config IOMMU_LEAK
-       bool "IOMMU leak tracing"
-       depends on DEBUG_KERNEL
-       depends on IOMMU_DEBUG
-       help
-         Add a simple leak tracer to the IOMMU code. This is useful when you
-         are debugging a buggy device driver that leaks IOMMU mappings.
-
-config DEBUG_STACKOVERFLOW
-        bool "Check for stack overflows"
-        depends on DEBUG_KERNEL
-        help
-          This option will cause messages to be printed if free stack space
-          drops below a certain limit.
-
-config DEBUG_STACK_USAGE
-        bool "Stack utilization instrumentation"
-        depends on DEBUG_KERNEL
-        help
-          Enables the display of the minimum amount of free stack which each
-          task has ever had available in the sysrq-T and sysrq-P debug output.
-
-          This option will slow down process creation somewhat.
-
-#config X86_REMOTE_DEBUG
-#       bool "kgdb debugging stub"
-
-endmenu
diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
index 83c5e76414ce..59594126e8b6 100644
--- a/scripts/kconfig/Makefile
+++ b/scripts/kconfig/Makefile
@@ -4,23 +4,30 @@
 
 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
+
 xconfig: $(obj)/qconf
-        $< arch/$(ARCH)/Kconfig
+        $< $(Kconfig)
 
 gconfig: $(obj)/gconf
-        $< arch/$(ARCH)/Kconfig
+        $< $(Kconfig)
 
 menuconfig: $(obj)/mconf
-        $< arch/$(ARCH)/Kconfig
+        $< $(Kconfig)
 
 config: $(obj)/conf
-        $< arch/$(ARCH)/Kconfig
+        $< $(Kconfig)
 
 oldconfig: $(obj)/conf
-        $< -o arch/$(ARCH)/Kconfig
+        $< -o $(Kconfig)
 
 silentoldconfig: $(obj)/conf
-        $< -s arch/$(ARCH)/Kconfig
+        $< -s $(Kconfig)
 
 # Create new linux.po file
 # Adjust charset to UTF-8 in .po file to accept UTF-8 in Kconfig files
@@ -45,27 +52,27 @@ update-po-config: $(obj)/kxgettext
 PHONY += randconfig allyesconfig allnoconfig allmodconfig defconfig
 
 randconfig: $(obj)/conf
-        $< -r arch/$(ARCH)/Kconfig
+        $< -r $(Kconfig)
 
 allyesconfig: $(obj)/conf
-        $< -y arch/$(ARCH)/Kconfig
+        $< -y $(Kconfig)
 
 allnoconfig: $(obj)/conf
-        $< -n arch/$(ARCH)/Kconfig
+        $< -n $(Kconfig)
 
 allmodconfig: $(obj)/conf
-        $< -m arch/$(ARCH)/Kconfig
+        $< -m $(Kconfig)
 
 defconfig: $(obj)/conf
 ifeq ($(KBUILD_DEFCONFIG),)
-        $< -d arch/$(ARCH)/Kconfig
+        $< -d $(Kconfig)
 else
-        @echo *** Default configuration is based on '$(KBUILD_DEFCONFIG)'
-        $(Q)$< -D arch/$(ARCH)/configs/$(KBUILD_DEFCONFIG) arch/$(ARCH)/Kconfig
+        @echo "*** Default configuration is based on '$(KBUILD_DEFCONFIG)'"
+        $(Q)$< -D arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG) $(Kconfig)
 endif
 
 %_defconfig: $(obj)/conf
-        $(Q)$< -D arch/$(ARCH)/configs/$@ arch/$(ARCH)/Kconfig
+        $(Q)$< -D arch/$(SRCARCH)/configs/$@ $(Kconfig)
 
 # Help text used by make help
 help: