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Date: Mon, 12 Nov 2007 22:00:35 +0100
From: Sam Ravnborg <sam@...nborg.org>
To: lkml <linux-kernel@...r.kernel.org>
Cc: Sam Ravnborg <sam@...nborg.org>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>,
"H. Peter Anvin" <hpa@...or.com>
Subject: [PATCH] x86: do not use $(ARCH) when not needed
For x86 ARCH may say i386 or x86_64 and soon x86.
Rely on CONFIG_X64_32 to select between 32/64 or just
hardcode the value as appropriate.
Signed-off-by: Sam Ravnborg <sam@...nborg.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: "H. Peter Anvin" <hpa@...or.com>
---
Makefile | 9 +++++++--
arch/x86/Makefile | 10 +++++++---
arch/x86/Makefile_32 | 8 ++++----
arch/x86/Makefile_64 | 8 ++++----
arch/x86/boot/Makefile | 6 +++---
arch/x86/kernel/Makefile_32 | 3 ++-
arch/x86/kernel/Makefile_64 | 2 ++
arch/x86/vdso/Makefile | 2 +-
8 files changed, 30 insertions(+), 18 deletions(-)
diff --git a/Makefile b/Makefile
index e28dde8..b32963a 100644
--- a/Makefile
+++ b/Makefile
@@ -197,8 +197,13 @@ 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
+endif
+ifeq ($(ARCH),x86_64)
+ SRCARCH := x86
+endif
KCONFIG_CONFIG ?= .config
diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 3095973..116b03a 100644
--- a/arch/x86/Makefile
+++ b/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
diff --git a/arch/x86/Makefile_32 b/arch/x86/Makefile_32
index 346ac07..50394da 100644
--- a/arch/x86/Makefile_32
+++ b/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
diff --git a/arch/x86/Makefile_64 b/arch/x86/Makefile_64
index 57e714a..a804860 100644
--- a/arch/x86/Makefile_64
+++ b/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
diff --git a/arch/x86/boot/Makefile b/arch/x86/boot/Makefile
index 89dbf97..7a3116c 100644
--- a/arch/x86/boot/Makefile
+++ b/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 \
diff --git a/arch/x86/kernel/Makefile_32 b/arch/x86/kernel/Makefile_32
index b9d6798..a7bc93c 100644
--- a/arch/x86/kernel/Makefile_32
+++ b/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)
diff --git a/arch/x86/kernel/Makefile_64 b/arch/x86/kernel/Makefile_64
index 24671c3..5a88890 100644
--- a/arch/x86/kernel/Makefile_64
+++ b/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 \
diff --git a/arch/x86/vdso/Makefile b/arch/x86/vdso/Makefile
index 7a2ba45..e7bff0f 100644
--- a/arch/x86/vdso/Makefile
+++ b/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) \
--
1.5.3.4.1157.g0e74-dirty
-
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