From 4198426af37e7122f2fda2538fa9dcaa19c5e397 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 23 Aug 2008 17:00:34 -0400
Subject: x86, um: merge Kconfig.i386 and Kconfig.x86_64

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
---
 arch/um/Kconfig        |  4 ++++
 arch/um/Kconfig.i386   | 45 ---------------------------------------------
 arch/um/Kconfig.x86    | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 arch/um/Kconfig.x86_64 | 39 ---------------------------------------
 arch/um/Makefile       |  4 ++--
 5 files changed, 52 insertions(+), 86 deletions(-)
 delete mode 100644 arch/um/Kconfig.i386
 create mode 100644 arch/um/Kconfig.x86
 delete mode 100644 arch/um/Kconfig.x86_64

diff --git a/arch/um/Kconfig b/arch/um/Kconfig
index 393bccfe1785..a0801fda0be4 100644
--- a/arch/um/Kconfig
+++ b/arch/um/Kconfig
@@ -85,6 +85,10 @@ config STATIC_LINK
 	  Additionally, this option enables using higher memory spaces (up to
 	  2.75G) for UML.
 
+config SUBARCH
+	string
+	option env="SUBARCH"
+
 source "arch/um/Kconfig.arch"
 source "mm/Kconfig"
 source "kernel/time/Kconfig"
diff --git a/arch/um/Kconfig.i386 b/arch/um/Kconfig.i386
deleted file mode 100644
index 1f57c113df6d..000000000000
--- a/arch/um/Kconfig.i386
+++ /dev/null
@@ -1,45 +0,0 @@
-menu "Host processor type and features"
-
-source "arch/x86/Kconfig.cpu"
-
-endmenu
-
-config UML_X86
-	bool
-	default y
-
-config X86_32
-	bool
-	default y
-  	select HAVE_AOUT
-
-config RWSEM_XCHGADD_ALGORITHM
-	def_bool y
-
-config 64BIT
-	bool
-	default n
-
-config 3_LEVEL_PGTABLES
-	bool "Three-level pagetables (EXPERIMENTAL)"
-	default n
-	depends on EXPERIMENTAL
-	help
-	Three-level pagetables will let UML have more than 4G of physical
-	memory.  All the memory that can't be mapped directly will be treated
-	as high memory.
-
-	However, this it experimental on 32-bit architectures, so if unsure say
-	N (on x86-64 it's automatically enabled, instead, as it's safe there).
-
-config ARCH_HAS_SC_SIGNALS
-	bool
-	default y
-
-config ARCH_REUSE_HOST_VSYSCALL_AREA
-	bool
-	default y
-
-config GENERIC_HWEIGHT
-	bool
-	default y
diff --git a/arch/um/Kconfig.x86 b/arch/um/Kconfig.x86
new file mode 100644
index 000000000000..76200c9f454a
--- /dev/null
+++ b/arch/um/Kconfig.x86
@@ -0,0 +1,46 @@
+menu "Host processor type and features"
+
+source "arch/x86/Kconfig.cpu"
+
+endmenu
+
+config UML_X86
+	def_bool y
+
+config 64BIT
+	bool
+	default SUBARCH = "x86_64"
+
+config X86_32
+	def_bool !64BIT
+	select HAVE_AOUT
+
+config RWSEM_XCHGADD_ALGORITHM
+	def_bool X86_XADD
+
+config RWSEM_GENERIC_SPINLOCK
+	def_bool !X86_XADD
+
+config 3_LEVEL_PGTABLES
+	bool "Three-level pagetables (EXPERIMENTAL)" if !64BIT
+	default 64BIT
+	depends on EXPERIMENTAL
+	help
+	Three-level pagetables will let UML have more than 4G of physical
+	memory.  All the memory that can't be mapped directly will be treated
+	as high memory.
+
+	However, this it experimental on 32-bit architectures, so if unsure say
+	N (on x86-64 it's automatically enabled, instead, as it's safe there).
+
+config ARCH_HAS_SC_SIGNALS
+	def_bool !64BIT
+
+config ARCH_REUSE_HOST_VSYSCALL_AREA
+	def_bool !64BIT
+
+config SMP_BROKEN
+	def_bool 64BIT
+
+config GENERIC_HWEIGHT
+	def_bool y
diff --git a/arch/um/Kconfig.x86_64 b/arch/um/Kconfig.x86_64
deleted file mode 100644
index 40b3407cfe16..000000000000
--- a/arch/um/Kconfig.x86_64
+++ /dev/null
@@ -1,39 +0,0 @@
-
-menu "Host processor type and features"
-
-source "arch/x86/Kconfig.cpu"
-
-endmenu
-
-config UML_X86
-	bool
-	default y
-
-config 64BIT
-	bool
-	default y
-
-#XXX: this is so in the underlying arch, but it's wrong!!!
-config RWSEM_GENERIC_SPINLOCK
-	bool
-	default y
-
-config 3_LEVEL_PGTABLES
-       bool
-       default y
-
-config ARCH_HAS_SC_SIGNALS
-	bool
-	default n
-
-config ARCH_REUSE_HOST_VSYSCALL_AREA
-	bool
-	default n
-
-config SMP_BROKEN
-	bool
-	default y
-
-config GENERIC_HWEIGHT
-	bool
-	default y
diff --git a/arch/um/Makefile b/arch/um/Makefile
index 2e042b0e3b8a..bc070cef3ceb 100644
--- a/arch/um/Makefile
+++ b/arch/um/Makefile
@@ -96,9 +96,9 @@ define archhelp
 endef
 
 ifneq ($(KBUILD_SRC),)
-$(shell mkdir -p $(ARCH_DIR) && ln -fsn $(srctree)/$(ARCH_DIR)/Kconfig.$(SUBARCH) $(ARCH_DIR)/Kconfig.arch)
+$(shell mkdir -p $(ARCH_DIR) && ln -fsn $(srctree)/$(ARCH_DIR)/Kconfig.$(HEADER_ARCH) $(ARCH_DIR)/Kconfig.arch)
 else
-$(shell ln -fsn Kconfig.$(SUBARCH) $(ARCH_DIR)/Kconfig.arch)
+$(shell ln -fsn Kconfig.$(HEADER_ARCH) $(ARCH_DIR)/Kconfig.arch)
 endif
 
 archprepare: $(ARCH_SYMLINKS) $(ARCH_DIR)/include/shared/user_constants.h
-- 
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