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

* git://git.kernel.org/pub/scm/linux/kernel/git/sam/x86:
  x86: kill the old i386 and x86_64 directories
  x86: move i386 and x86_64 Kconfig files to x86 directory
  kconfig: small code refactoring in kconfig Makefile
  x86: unification of i386 and x86_64 Kconfig.debug
  x86: move defconfig files for i386 and x86_64 to x86
  x86: move i386 and x86_64 Makefiles to arch/x86

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

arch/i386/.gitignore

@@ -1 +0,0 @@
-boot

arch/i386/Kconfig.debug → 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

arch/i386/Kconfig → 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"
 

arch/x86_64/Kconfig → 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"
 

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
+
+
+

arch/i386/Makefile → 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

arch/x86_64/Makefile → 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

arch/x86_64/.gitignore

@@ -1 +0,0 @@
-boot

arch/x86_64/Kconfig.debug

@@ -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

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: