[GIT PULL] x86/build change for v3.6

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* [GIT PULL] x86/build change for v3.6
@ 2012-07-22 13:44 Ingo Molnar
  2012-07-22 13:58 ` Kirill A. Shutemov
  0 siblings, 1 reply; 8+ messages in thread
From: Ingo Molnar @ 2012-07-22 13:44 UTC (permalink / raw)
  To: Linus Torvalds
  Cc: linux-kernel, H. Peter Anvin, Thomas Gleixner, Andrew Morton

Linus,

Please pull the latest x86-build-for-linus git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-build-for-linus

   HEAD: d9b0cde91c60da0ed5f92cdc3ac878142e6b5f27 x86-64, gcc: Use -mpreferred-stack-boundary=3 if supported

 Thanks,

	Ingo

------------------>
H.J. Lu (1):
      x86-64, gcc: Use -mpreferred-stack-boundary=3 if supported


 arch/x86/Makefile |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 1f25214..b0c5276 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -49,6 +49,9 @@ else
         KBUILD_AFLAGS += -m64
         KBUILD_CFLAGS += -m64
 
+	# Use -mpreferred-stack-boundary=3 if supported.
+	KBUILD_CFLAGS += $(call cc-option,-mno-sse -mpreferred-stack-boundary=3)
+
         # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)
         cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
         cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)

^ permalink raw reply related	[flat|nested] 8+ messages in thread

* Re: [GIT PULL] x86/build change for v3.6
  2012-07-22 13:44 [GIT PULL] x86/build change for v3.6 Ingo Molnar
@ 2012-07-22 13:58 ` Kirill A. Shutemov
  2012-07-22 14:22   ` Ingo Molnar
  0 siblings, 1 reply; 8+ messages in thread
From: Kirill A. Shutemov @ 2012-07-22 13:58 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: Linus Torvalds, linux-kernel, H. Peter Anvin, Thomas Gleixner,
	Andrew Morton

On Sun, Jul 22, 2012 at 03:44:51PM +0200, Ingo Molnar wrote:
> Linus,
> 
> Please pull the latest x86-build-for-linus git tree from:
> 
>    git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-build-for-linus
> 
>    HEAD: d9b0cde91c60da0ed5f92cdc3ac878142e6b5f27 x86-64, gcc: Use -mpreferred-stack-boundary=3 if supported
> 
>  Thanks,
> 
> 	Ingo
> 
> ------------------>
> H.J. Lu (1):
>       x86-64, gcc: Use -mpreferred-stack-boundary=3 if supported
> 
> 
>  arch/x86/Makefile |    3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/arch/x86/Makefile b/arch/x86/Makefile
> index 1f25214..b0c5276 100644
> --- a/arch/x86/Makefile
> +++ b/arch/x86/Makefile
> @@ -49,6 +49,9 @@ else
>          KBUILD_AFLAGS += -m64
>          KBUILD_CFLAGS += -m64
>  
> +	# Use -mpreferred-stack-boundary=3 if supported.
> +	KBUILD_CFLAGS += $(call cc-option,-mno-sse -mpreferred-stack-boundary=3)
> +

Broken indent?

>          # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)
>          cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
>          cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/

-- 
 Kirill A. Shutemov

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [GIT PULL] x86/build change for v3.6
  2012-07-22 13:58 ` Kirill A. Shutemov
@ 2012-07-22 14:22   ` Ingo Molnar
  2012-07-23  9:35     ` Kirill A. Shutemov
  2012-07-25 20:15     ` Sam Ravnborg
  0 siblings, 2 replies; 8+ messages in thread
From: Ingo Molnar @ 2012-07-22 14:22 UTC (permalink / raw)
  To: Kirill A. Shutemov
  Cc: Linus Torvalds, linux-kernel, H. Peter Anvin, Thomas Gleixner,
	Andrew Morton


* Kirill A. Shutemov <kirill@shutemov.name> wrote:

> On Sun, Jul 22, 2012 at 03:44:51PM +0200, Ingo Molnar wrote:
> > Linus,
> > 
> > Please pull the latest x86-build-for-linus git tree from:
> > 
> >    git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-build-for-linus
> > 
> >    HEAD: d9b0cde91c60da0ed5f92cdc3ac878142e6b5f27 x86-64, gcc: Use -mpreferred-stack-boundary=3 if supported
> > 
> >  Thanks,
> > 
> > 	Ingo
> > 
> > ------------------>
> > H.J. Lu (1):
> >       x86-64, gcc: Use -mpreferred-stack-boundary=3 if supported
> > 
> > 
> >  arch/x86/Makefile |    3 +++
> >  1 file changed, 3 insertions(+)
> > 
> > diff --git a/arch/x86/Makefile b/arch/x86/Makefile
> > index 1f25214..b0c5276 100644
> > --- a/arch/x86/Makefile
> > +++ b/arch/x86/Makefile
> > @@ -49,6 +49,9 @@ else
> >          KBUILD_AFLAGS += -m64
> >          KBUILD_CFLAGS += -m64
> >  
> > +	# Use -mpreferred-stack-boundary=3 if supported.
> > +	KBUILD_CFLAGS += $(call cc-option,-mno-sse -mpreferred-stack-boundary=3)
> > +
> 
> Broken indent?

No, the reason for the odd looking diff is that lots of lines in 
arch/x86/Makefile have 8-space tabs for histerical reasons but 
new code (such as this one) has proper tabs.

Wanna send a (tested) cleanup patch to make it all look tidy?

Thanks,

	Ingo

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [GIT PULL] x86/build change for v3.6
  2012-07-22 14:22   ` Ingo Molnar
@ 2012-07-23  9:35     ` Kirill A. Shutemov
  2012-07-25 20:15     ` Sam Ravnborg
  1 sibling, 0 replies; 8+ messages in thread
From: Kirill A. Shutemov @ 2012-07-23  9:35 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: Linus Torvalds, linux-kernel, H. Peter Anvin, Thomas Gleixner,
	Andrew Morton

On Sun, Jul 22, 2012 at 04:22:04PM +0200, Ingo Molnar wrote:
> 
> * Kirill A. Shutemov <kirill@shutemov.name> wrote:
> 
> > On Sun, Jul 22, 2012 at 03:44:51PM +0200, Ingo Molnar wrote:
> > > Linus,
> > > 
> > > Please pull the latest x86-build-for-linus git tree from:
> > > 
> > >    git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-build-for-linus
> > > 
> > >    HEAD: d9b0cde91c60da0ed5f92cdc3ac878142e6b5f27 x86-64, gcc: Use -mpreferred-stack-boundary=3 if supported
> > > 
> > >  Thanks,
> > > 
> > > 	Ingo
> > > 
> > > ------------------>
> > > H.J. Lu (1):
> > >       x86-64, gcc: Use -mpreferred-stack-boundary=3 if supported
> > > 
> > > 
> > >  arch/x86/Makefile |    3 +++
> > >  1 file changed, 3 insertions(+)
> > > 
> > > diff --git a/arch/x86/Makefile b/arch/x86/Makefile
> > > index 1f25214..b0c5276 100644
> > > --- a/arch/x86/Makefile
> > > +++ b/arch/x86/Makefile
> > > @@ -49,6 +49,9 @@ else
> > >          KBUILD_AFLAGS += -m64
> > >          KBUILD_CFLAGS += -m64
> > >  
> > > +	# Use -mpreferred-stack-boundary=3 if supported.
> > > +	KBUILD_CFLAGS += $(call cc-option,-mno-sse -mpreferred-stack-boundary=3)
> > > +
> > 
> > Broken indent?
> 
> No, the reason for the odd looking diff is that lots of lines in 
> arch/x86/Makefile have 8-space tabs for histerical reasons but 
> new code (such as this one) has proper tabs.
> 
> Wanna send a (tested) cleanup patch to make it all look tidy?

>From 1b5d73179f8fe26480c57a8f069300fe56304756 Mon Sep 17 00:00:00 2001
From: "Kirill A. Shutemov" <kirill@shutemov.name>
Date: Mon, 23 Jul 2012 12:30:24 +0300
Subject: [PATCH] x86: whitespace cleanup in makefiles

Buildtested: defconfig, allnoconfig, allmodconfig, allyesconfig for both
32- and 64-bit.

Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
---
 arch/x86/Makefile                   | 124 ++++++++++++++++++------------------
 arch/x86/Makefile.um                |   2 +-
 arch/x86/Makefile_32.cpu            |   2 +-
 arch/x86/boot/Makefile              |  20 +++---
 arch/x86/crypto/Makefile            |  74 ++++++++++-----------
 arch/x86/ia32/Makefile              |  10 +--
 arch/x86/kernel/Makefile            |  14 ++--
 arch/x86/kernel/cpu/mcheck/Makefile |   2 +-
 arch/x86/lib/Makefile               |  26 ++++----
 arch/x86/math-emu/Makefile          |   2 +-
 arch/x86/oprofile/Makefile          |   2 +-
 arch/x86/pci/Makefile               |   4 +-
 arch/x86/platform/efi/Makefile      |   2 +-
 arch/x86/platform/olpc/Makefile     |   2 +-
 arch/x86/realmode/Makefile          |   6 +-
 arch/x86/realmode/rm/Makefile       |   2 +-
 arch/x86/tools/Makefile             |   8 +--
 arch/x86/um/os-Linux/Makefile       |   4 +-
 arch/x86/um/vdso/Makefile           |  16 ++---
 arch/x86/vdso/Makefile              |  12 ++--
 arch/x86/video/Makefile             |   2 +-
 arch/x86/xen/Makefile               |   2 +-
 22 files changed, 169 insertions(+), 169 deletions(-)

diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index b0c5276..c6897b2 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -2,9 +2,9 @@
 
 # select defconfig based on actual architecture
 ifeq ($(ARCH),x86)
-        KBUILD_DEFCONFIG := i386_defconfig
+	KBUILD_DEFCONFIG := i386_defconfig
 else
-        KBUILD_DEFCONFIG := $(ARCH)_defconfig
+	KBUILD_DEFCONFIG := $(ARCH)_defconfig
 endif
 
 # BITS is used as extension for files which are available in a 32 bit
@@ -13,76 +13,76 @@ endif
 export BITS
 
 ifeq ($(CONFIG_X86_32),y)
-        BITS := 32
-        UTS_MACHINE := i386
-        CHECKFLAGS += -D__i386__
+	BITS := 32
+	UTS_MACHINE := i386
+	CHECKFLAGS += -D__i386__
 
-        biarch := $(call cc-option,-m32)
-        KBUILD_AFLAGS += $(biarch)
-        KBUILD_CFLAGS += $(biarch)
+	biarch := $(call cc-option,-m32)
+	KBUILD_AFLAGS += $(biarch)
+	KBUILD_CFLAGS += $(biarch)
 
-        ifdef CONFIG_RELOCATABLE
-                LDFLAGS_vmlinux := --emit-relocs
-        endif
+	ifdef CONFIG_RELOCATABLE
+		LDFLAGS_vmlinux := --emit-relocs
+	endif
 
-        KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return
+	KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return
 
-        # prevent gcc from keeping the stack 16 byte aligned
-        KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)
+	# prevent gcc from keeping the stack 16 byte aligned
+	KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)
 
-        # Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use
-        # a lot more stack due to the lack of sharing of stacklots:
-        KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0400, \
+	# Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use
+	# a lot more stack due to the lack of sharing of stacklots:
+	KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0400, \
 				$(call cc-option,-fno-unit-at-a-time))
 
-        # CPU-specific tuning. Anything which can be shared with UML should go here.
-        include $(srctree)/arch/x86/Makefile_32.cpu
-        KBUILD_CFLAGS += $(cflags-y)
+	# CPU-specific tuning. Anything which can be shared with UML should go here.
+	include $(srctree)/arch/x86/Makefile_32.cpu
+	KBUILD_CFLAGS += $(cflags-y)
 
-        # temporary until string.h is fixed
-        KBUILD_CFLAGS += -ffreestanding
+	# temporary until string.h is fixed
+	KBUILD_CFLAGS += -ffreestanding
 else
-        BITS := 64
-        UTS_MACHINE := x86_64
-        CHECKFLAGS += -D__x86_64__ -m64
+	BITS := 64
+	UTS_MACHINE := x86_64
+	CHECKFLAGS += -D__x86_64__ -m64
 
-        KBUILD_AFLAGS += -m64
-        KBUILD_CFLAGS += -m64
+	KBUILD_AFLAGS += -m64
+	KBUILD_CFLAGS += -m64
 
 	# Use -mpreferred-stack-boundary=3 if supported.
 	KBUILD_CFLAGS += $(call cc-option,-mno-sse -mpreferred-stack-boundary=3)
 
-        # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)
-        cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
-        cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)
+	# FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)
+	cflags-$(CONFIG_MK8)	+= $(call cc-option,-march=k8)
+	cflags-$(CONFIG_MPSC)	+= $(call cc-option,-march=nocona)
 
-        cflags-$(CONFIG_MCORE2) += \
-                $(call cc-option,-march=core2,$(call cc-option,-mtune=generic))
-	cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom) \
+	cflags-$(CONFIG_MCORE2)	+= \
+		$(call cc-option,-march=core2,$(call cc-option,-mtune=generic))
+	cflags-$(CONFIG_MATOM)	+= $(call cc-option,-march=atom) \
 		$(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic))
-        cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic)
-        KBUILD_CFLAGS += $(cflags-y)
+	cflags-$(CONFIG_GENERIC_CPU)	+= $(call cc-option,-mtune=generic)
+	KBUILD_CFLAGS += $(cflags-y)
 
-        KBUILD_CFLAGS += -mno-red-zone
-        KBUILD_CFLAGS += -mcmodel=kernel
+	KBUILD_CFLAGS += -mno-red-zone
+	KBUILD_CFLAGS += -mcmodel=kernel
 
-        # -funit-at-a-time shrinks the kernel .text considerably
-        # unfortunately it makes reading oopses harder.
-        KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
+	# -funit-at-a-time shrinks the kernel .text considerably
+	# unfortunately it makes reading oopses harder.
+	KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
 
-        # this works around some issues with generating unwind tables in older gccs
-        # newer gccs do it by default
-        KBUILD_CFLAGS += -maccumulate-outgoing-args
+	# this works around some issues with generating unwind tables in older gccs
+	# newer gccs do it by default
+	KBUILD_CFLAGS += -maccumulate-outgoing-args
 endif
 
 ifdef CONFIG_CC_STACKPROTECTOR
 	cc_has_sp := $(srctree)/scripts/gcc-x86_$(BITS)-has-stack-protector.sh
-        ifeq ($(shell $(CONFIG_SHELL) $(cc_has_sp) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y)
-                stackp-y := -fstack-protector
-                KBUILD_CFLAGS += $(stackp-y)
-        else
-                $(warning stack protector enabled but no compiler support)
-        endif
+	ifeq ($(shell $(CONFIG_SHELL) $(cc_has_sp) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y)
+		stackp-y := -fstack-protector
+		KBUILD_CFLAGS += $(stackp-y)
+	else
+		$(warning stack protector enabled but no compiler support)
+	endif
 endif
 
 ifdef CONFIG_X86_X32
@@ -91,13 +91,13 @@ ifdef CONFIG_X86_X32
 			$(CC) $(KBUILD_AFLAGS) -c -xassembler -o "$$TMP" - && \
 			$(OBJCOPY) -O elf32-x86-64 "$$TMP" "$$TMPO" && \
 			$(LD) -m elf32_x86_64 "$$TMPO" -o "$$TMP",y,n)
-        ifeq ($(x32_ld_ok),y)
-                CONFIG_X86_X32_ABI := y
-                KBUILD_AFLAGS += -DCONFIG_X86_X32_ABI
-                KBUILD_CFLAGS += -DCONFIG_X86_X32_ABI
-        else
-                $(warning CONFIG_X86_X32 enabled but no binutils support)
-        endif
+	ifeq ($(x32_ld_ok),y)
+		CONFIG_X86_X32_ABI := y
+		KBUILD_AFLAGS += -DCONFIG_X86_X32_ABI
+		KBUILD_CFLAGS += -DCONFIG_X86_X32_ABI
+	else
+		$(warning CONFIG_X86_X32 enabled but no binutils support)
+	endif
 endif
 export CONFIG_X86_X32_ABI
 
@@ -154,22 +154,22 @@ head-y := arch/x86/kernel/head_$(BITS).o
 head-y += arch/x86/kernel/head$(BITS).o
 head-y += arch/x86/kernel/head.o
 
-libs-y  += arch/x86/lib/
+libs-y += arch/x86/lib/
 
 # See arch/x86/Kbuild for content of core part of the kernel
 core-y += arch/x86/
 
 # drivers-y are linked after core-y
-drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/
-drivers-$(CONFIG_PCI)            += arch/x86/pci/
+drivers-$(CONFIG_MATH_EMULATION)	+= arch/x86/math-emu/
+drivers-$(CONFIG_PCI)			+= arch/x86/pci/
 
 # must be linked after kernel/
-drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/
+drivers-$(CONFIG_OPROFILE)	+= arch/x86/oprofile/
 
 # suspend and hibernation support
-drivers-$(CONFIG_PM) += arch/x86/power/
+drivers-$(CONFIG_PM)	+= arch/x86/power/
 
-drivers-$(CONFIG_FB) += arch/x86/video/
+drivers-$(CONFIG_FB)	+= arch/x86/video/
 
 ####
 # boot loader support. Several targets are kept for legacy purposes
diff --git a/arch/x86/Makefile.um b/arch/x86/Makefile.um
index 36b62bc..586f4b0 100644
--- a/arch/x86/Makefile.um
+++ b/arch/x86/Makefile.um
@@ -5,7 +5,7 @@ START := 0x8048000
 
 LDFLAGS			+= -m elf_i386
 ELF_ARCH		:= i386
-ELF_FORMAT 		:= elf32-i386
+ELF_FORMAT		:= elf32-i386
 CHECKFLAGS	+= -D__i386__
 
 KBUILD_CFLAGS		+= $(call cc-option,-m32)
diff --git a/arch/x86/Makefile_32.cpu b/arch/x86/Makefile_32.cpu
index 86cee7b..5afa477 100644
--- a/arch/x86/Makefile_32.cpu
+++ b/arch/x86/Makefile_32.cpu
@@ -44,7 +44,7 @@ cflags-$(CONFIG_MGEODEGX1)	+= -march=pentium-mmx
 cflags-$(CONFIG_MGEODE_LX)	+= $(call cc-option,-march=geode,-march=pentium-mmx)
 # add at the end to overwrite eventual tuning options from earlier
 # cpu entries
-cflags-$(CONFIG_X86_GENERIC) 	+= $(call tune,generic,$(call tune,i686))
+cflags-$(CONFIG_X86_GENERIC)	+= $(call tune,generic,$(call tune,i686))
 
 # Work around the pentium-mmx code generator madness of gcc4.4.x which
 # does stack alignment by generating horrible code _before_ the mcount
diff --git a/arch/x86/boot/Makefile b/arch/x86/boot/Makefile
index 5a747dd..debb43a 100644
--- a/arch/x86/boot/Makefile
+++ b/arch/x86/boot/Makefile
@@ -38,7 +38,7 @@ targets		+= $(setup-y)
 hostprogs-y	:= mkcpustr tools/build
 
 HOST_EXTRACFLAGS += -I$(srctree)/tools/include $(LINUXINCLUDE) \
-	            -D__EXPORTED_HEADERS__
+			-D__EXPORTED_HEADERS__
 
 $(obj)/cpu.o: $(obj)/cpustr.h
 
@@ -53,16 +53,16 @@ $(obj)/cpustr.h: $(obj)/mkcpustr FORCE
 # 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.
 KBUILD_CFLAGS	:= $(LINUXINCLUDE) -g -Os -D_SETUP -D__KERNEL__ \
-		   -DDISABLE_BRANCH_PROFILING \
-		   -Wall -Wstrict-prototypes \
-		   -march=i386 -mregparm=3 \
-		   -include $(srctree)/$(src)/code16gcc.h \
-		   -fno-strict-aliasing -fomit-frame-pointer \
-		   $(call cc-option, -ffreestanding) \
-		   $(call cc-option, -fno-toplevel-reorder,\
+			-DDISABLE_BRANCH_PROFILING \
+			-Wall -Wstrict-prototypes \
+			-march=i386 -mregparm=3 \
+			-include $(srctree)/$(src)/code16gcc.h \
+			-fno-strict-aliasing -fomit-frame-pointer \
+			$(call cc-option, -ffreestanding) \
+			$(call cc-option, -fno-toplevel-reorder,\
 			$(call cc-option, -fno-unit-at-a-time)) \
-		   $(call cc-option, -fno-stack-protector) \
-		   $(call cc-option, -mpreferred-stack-boundary=2)
+			$(call cc-option, -fno-stack-protector) \
+			$(call cc-option, -mpreferred-stack-boundary=2)
 KBUILD_CFLAGS	+= $(call cc-option, -m32)
 KBUILD_AFLAGS	:= $(KBUILD_CFLAGS) -D__ASSEMBLY__
 GCOV_PROFILE := n
diff --git a/arch/x86/crypto/Makefile b/arch/x86/crypto/Makefile
index e191ac0..d2095f7 100644
--- a/arch/x86/crypto/Makefile
+++ b/arch/x86/crypto/Makefile
@@ -2,44 +2,44 @@
 # Arch-specific CryptoAPI modules.
 #
 
-obj-$(CONFIG_CRYPTO_AES_586) += aes-i586.o
-obj-$(CONFIG_CRYPTO_TWOFISH_586) += twofish-i586.o
-obj-$(CONFIG_CRYPTO_SALSA20_586) += salsa20-i586.o
-obj-$(CONFIG_CRYPTO_SERPENT_SSE2_586) += serpent-sse2-i586.o
-
-obj-$(CONFIG_CRYPTO_AES_X86_64) += aes-x86_64.o
-obj-$(CONFIG_CRYPTO_CAMELLIA_X86_64) += camellia-x86_64.o
-obj-$(CONFIG_CRYPTO_BLOWFISH_X86_64) += blowfish-x86_64.o
-obj-$(CONFIG_CRYPTO_TWOFISH_X86_64) += twofish-x86_64.o
-obj-$(CONFIG_CRYPTO_TWOFISH_X86_64_3WAY) += twofish-x86_64-3way.o
-obj-$(CONFIG_CRYPTO_SALSA20_X86_64) += salsa20-x86_64.o
-obj-$(CONFIG_CRYPTO_SERPENT_SSE2_X86_64) += serpent-sse2-x86_64.o
-obj-$(CONFIG_CRYPTO_AES_NI_INTEL) += aesni-intel.o
-obj-$(CONFIG_CRYPTO_GHASH_CLMUL_NI_INTEL) += ghash-clmulni-intel.o
-
-obj-$(CONFIG_CRYPTO_CRC32C_INTEL) += crc32c-intel.o
-obj-$(CONFIG_CRYPTO_SHA1_SSSE3) += sha1-ssse3.o
-
-aes-i586-y := aes-i586-asm_32.o aes_glue.o
-twofish-i586-y := twofish-i586-asm_32.o twofish_glue.o
-salsa20-i586-y := salsa20-i586-asm_32.o salsa20_glue.o
-serpent-sse2-i586-y := serpent-sse2-i586-asm_32.o serpent_sse2_glue.o
-
-aes-x86_64-y := aes-x86_64-asm_64.o aes_glue.o
-camellia-x86_64-y := camellia-x86_64-asm_64.o camellia_glue.o
-blowfish-x86_64-y := blowfish-x86_64-asm_64.o blowfish_glue.o
-twofish-x86_64-y := twofish-x86_64-asm_64.o twofish_glue.o
-twofish-x86_64-3way-y := twofish-x86_64-asm_64-3way.o twofish_glue_3way.o
-salsa20-x86_64-y := salsa20-x86_64-asm_64.o salsa20_glue.o
-serpent-sse2-x86_64-y := serpent-sse2-x86_64-asm_64.o serpent_sse2_glue.o
-
-aesni-intel-y := aesni-intel_asm.o aesni-intel_glue.o fpu.o
-
-ghash-clmulni-intel-y := ghash-clmulni-intel_asm.o ghash-clmulni-intel_glue.o
+obj-$(CONFIG_CRYPTO_AES_586)		+= aes-i586.o
+obj-$(CONFIG_CRYPTO_TWOFISH_586)	+= twofish-i586.o
+obj-$(CONFIG_CRYPTO_SALSA20_586)	+= salsa20-i586.o
+obj-$(CONFIG_CRYPTO_SERPENT_SSE2_586)	+= serpent-sse2-i586.o
+
+obj-$(CONFIG_CRYPTO_AES_X86_64)			+= aes-x86_64.o
+obj-$(CONFIG_CRYPTO_CAMELLIA_X86_64)		+= camellia-x86_64.o
+obj-$(CONFIG_CRYPTO_BLOWFISH_X86_64)		+= blowfish-x86_64.o
+obj-$(CONFIG_CRYPTO_TWOFISH_X86_64)		+= twofish-x86_64.o
+obj-$(CONFIG_CRYPTO_TWOFISH_X86_64_3WAY)	+= twofish-x86_64-3way.o
+obj-$(CONFIG_CRYPTO_SALSA20_X86_64)		+= salsa20-x86_64.o
+obj-$(CONFIG_CRYPTO_SERPENT_SSE2_X86_64)	+= serpent-sse2-x86_64.o
+obj-$(CONFIG_CRYPTO_AES_NI_INTEL)		+= aesni-intel.o
+obj-$(CONFIG_CRYPTO_GHASH_CLMUL_NI_INTEL)	+= ghash-clmulni-intel.o
+
+obj-$(CONFIG_CRYPTO_CRC32C_INTEL)	+= crc32c-intel.o
+obj-$(CONFIG_CRYPTO_SHA1_SSSE3)		+= sha1-ssse3.o
+
+aes-i586-y		:= aes-i586-asm_32.o aes_glue.o
+twofish-i586-y		:= twofish-i586-asm_32.o twofish_glue.o
+salsa20-i586-y		:= salsa20-i586-asm_32.o salsa20_glue.o
+serpent-sse2-i586-y	:= serpent-sse2-i586-asm_32.o serpent_sse2_glue.o
+
+aes-x86_64-y		:= aes-x86_64-asm_64.o aes_glue.o
+camellia-x86_64-y	:= camellia-x86_64-asm_64.o camellia_glue.o
+blowfish-x86_64-y	:= blowfish-x86_64-asm_64.o blowfish_glue.o
+twofish-x86_64-y	:= twofish-x86_64-asm_64.o twofish_glue.o
+twofish-x86_64-3way-y	:= twofish-x86_64-asm_64-3way.o twofish_glue_3way.o
+salsa20-x86_64-y	:= salsa20-x86_64-asm_64.o salsa20_glue.o
+serpent-sse2-x86_64-y	:= serpent-sse2-x86_64-asm_64.o serpent_sse2_glue.o
+
+aesni-intel-y		:= aesni-intel_asm.o aesni-intel_glue.o fpu.o
+
+ghash-clmulni-intel-y	:= ghash-clmulni-intel_asm.o ghash-clmulni-intel_glue.o
 
 # enable AVX support only when $(AS) can actually assemble the instructions
 ifeq ($(call as-instr,vpxor %xmm0$(comma)%xmm1$(comma)%xmm2,yes,no),yes)
-AFLAGS_sha1_ssse3_asm.o += -DSHA1_ENABLE_AVX_SUPPORT
-CFLAGS_sha1_ssse3_glue.o += -DSHA1_ENABLE_AVX_SUPPORT
+AFLAGS_sha1_ssse3_asm.o		+= -DSHA1_ENABLE_AVX_SUPPORT
+CFLAGS_sha1_ssse3_glue.o	+= -DSHA1_ENABLE_AVX_SUPPORT
 endif
-sha1-ssse3-y := sha1_ssse3_asm.o sha1_ssse3_glue.o
+sha1-ssse3-y		:= sha1_ssse3_asm.o sha1_ssse3_glue.o
diff --git a/arch/x86/ia32/Makefile b/arch/x86/ia32/Makefile
index 455646e..8357fd4 100644
--- a/arch/x86/ia32/Makefile
+++ b/arch/x86/ia32/Makefile
@@ -5,10 +5,10 @@
 obj-$(CONFIG_IA32_EMULATION) := ia32entry.o sys_ia32.o ia32_signal.o
 obj-$(CONFIG_IA32_EMULATION) += nosyscall.o syscall_ia32.o
 
-sysv-$(CONFIG_SYSVIPC) := ipc32.o
-obj-$(CONFIG_IA32_EMULATION) += $(sysv-y)
+sysv-$(CONFIG_SYSVIPC)		:= ipc32.o
+obj-$(CONFIG_IA32_EMULATION)	+= $(sysv-y)
 
-obj-$(CONFIG_IA32_AOUT) += ia32_aout.o
+obj-$(CONFIG_IA32_AOUT)		+= ia32_aout.o
 
-audit-class-$(CONFIG_AUDIT) := audit.o
-obj-$(CONFIG_IA32_EMULATION) += $(audit-class-y)
+audit-class-$(CONFIG_AUDIT)	:= audit.o
+obj-$(CONFIG_IA32_EMULATION)	+= $(audit-class-y)
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index 8215e56..18fa410 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -2,7 +2,7 @@
 # Makefile for the linux kernel.
 #
 
-extra-y                := head_$(BITS).o head$(BITS).o head.o vmlinux.lds
+extra-y := head_$(BITS).o head$(BITS).o head.o vmlinux.lds
 
 CPPFLAGS_vmlinux.lds += -U$(UTS_MACHINE)
 
@@ -21,7 +21,7 @@ obj-y			:= process_$(BITS).o signal.o entry_$(BITS).o
 obj-y			+= traps.o irq.o irq_$(BITS).o dumpstack_$(BITS).o
 obj-y			+= time.o ioport.o ldt.o dumpstack.o nmi.o
 obj-y			+= setup.o x86_init.o i8259.o irqinit.o jump_label.o
-obj-$(CONFIG_IRQ_WORK)  += irq_work.o
+obj-$(CONFIG_IRQ_WORK)	+= irq_work.o
 obj-y			+= probe_roms.o
 obj-$(CONFIG_X86_32)	+= sys_i386_32.o i386_ksyms_32.o
 obj-$(CONFIG_X86_64)	+= sys_x86_64.o x8664_ksyms_64.o
@@ -76,10 +76,10 @@ obj-$(CONFIG_EARLY_PRINTK)	+= early_printk.o
 obj-$(CONFIG_HPET_TIMER) 	+= hpet.o
 obj-$(CONFIG_APB_TIMER)		+= apb_timer.o
 
-obj-$(CONFIG_AMD_NB)		+= amd_nb.o
-obj-$(CONFIG_DEBUG_RODATA_TEST)	+= test_rodata.o
-obj-$(CONFIG_DEBUG_NX_TEST)	+= test_nx.o
-obj-$(CONFIG_DEBUG_NMI_SELFTEST) += nmi_selftest.o
+obj-$(CONFIG_AMD_NB)			+= amd_nb.o
+obj-$(CONFIG_DEBUG_RODATA_TEST)		+= test_rodata.o
+obj-$(CONFIG_DEBUG_NX_TEST)		+= test_nx.o
+obj-$(CONFIG_DEBUG_NMI_SELFTEST)	+= nmi_selftest.o
 
 obj-$(CONFIG_KVM_GUEST)		+= kvm.o
 obj-$(CONFIG_KVM_CLOCK)		+= kvmclock.o
@@ -94,7 +94,7 @@ microcode-$(CONFIG_MICROCODE_INTEL)	+= microcode_intel.o
 microcode-$(CONFIG_MICROCODE_AMD)	+= microcode_amd.o
 obj-$(CONFIG_MICROCODE)			+= microcode.o
 
-obj-$(CONFIG_X86_CHECK_BIOS_CORRUPTION) += check.o
+obj-$(CONFIG_X86_CHECK_BIOS_CORRUPTION)	+= check.o
 
 obj-$(CONFIG_SWIOTLB)			+= pci-swiotlb.o
 obj-$(CONFIG_OF)			+= devicetree.o
diff --git a/arch/x86/kernel/cpu/mcheck/Makefile b/arch/x86/kernel/cpu/mcheck/Makefile
index bb34b03..c8dc62c 100644
--- a/arch/x86/kernel/cpu/mcheck/Makefile
+++ b/arch/x86/kernel/cpu/mcheck/Makefile
@@ -3,7 +3,7 @@ obj-y				=  mce.o mce-severity.o
 obj-$(CONFIG_X86_ANCIENT_MCE)	+= winchip.o p5.o
 obj-$(CONFIG_X86_MCE_INTEL)	+= mce_intel.o
 obj-$(CONFIG_X86_MCE_AMD)	+= mce_amd.o
-obj-$(CONFIG_X86_MCE_THRESHOLD) += threshold.o
+obj-$(CONFIG_X86_MCE_THRESHOLD)	+= threshold.o
 obj-$(CONFIG_X86_MCE_INJECT)	+= mce-inject.o
 
 obj-$(CONFIG_X86_THERMAL_VECTOR) += therm_throt.o
diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile
index b00f678..3591f40 100644
--- a/arch/x86/lib/Makefile
+++ b/arch/x86/lib/Makefile
@@ -27,21 +27,21 @@ lib-$(CONFIG_INSTRUCTION_DECODER) += insn.o inat.o
 obj-y += msr.o msr-reg.o msr-reg-export.o
 
 ifeq ($(CONFIG_X86_32),y)
-        obj-y += atomic64_32.o
-        lib-y += atomic64_cx8_32.o
-        lib-y += checksum_32.o
-        lib-y += strstr_32.o
-        lib-y += string_32.o
-        lib-y += cmpxchg.o
+	obj-y += atomic64_32.o
+	lib-y += atomic64_cx8_32.o
+	lib-y += checksum_32.o
+	lib-y += strstr_32.o
+	lib-y += string_32.o
+	lib-y += cmpxchg.o
 ifneq ($(CONFIG_X86_CMPXCHG64),y)
-        lib-y += cmpxchg8b_emu.o atomic64_386_32.o
+	lib-y += cmpxchg8b_emu.o atomic64_386_32.o
 endif
-        lib-$(CONFIG_X86_USE_3DNOW) += mmx_32.o
+	lib-$(CONFIG_X86_USE_3DNOW) += mmx_32.o
 else
-        obj-y += iomap_copy_64.o
-        lib-y += csum-partial_64.o csum-copy_64.o csum-wrappers_64.o
-        lib-y += thunk_64.o clear_page_64.o copy_page_64.o
-        lib-y += memmove_64.o memset_64.o
-        lib-y += copy_user_64.o copy_user_nocache_64.o
+	obj-y += iomap_copy_64.o
+	lib-y += csum-partial_64.o csum-copy_64.o csum-wrappers_64.o
+	lib-y += thunk_64.o clear_page_64.o copy_page_64.o
+	lib-y += memmove_64.o memset_64.o
+	lib-y += copy_user_64.o copy_user_nocache_64.o
 	lib-y += cmpxchg16b_emu.o
 endif
diff --git a/arch/x86/math-emu/Makefile b/arch/x86/math-emu/Makefile
index 9b0c63b..b66a055 100644
--- a/arch/x86/math-emu/Makefile
+++ b/arch/x86/math-emu/Makefile
@@ -1,5 +1,5 @@
 #
-#               Makefile for wm-FPU-emu
+#		Makefile for wm-FPU-emu
 #
 
 #DEBUG	= -DDEBUGGING
diff --git a/arch/x86/oprofile/Makefile b/arch/x86/oprofile/Makefile
index 1599f56..871d7fb 100644
--- a/arch/x86/oprofile/Makefile
+++ b/arch/x86/oprofile/Makefile
@@ -7,5 +7,5 @@ DRIVER_OBJS = $(addprefix ../../../drivers/oprofile/, \
 		timer_int.o nmi_timer_int.o )
 
 oprofile-y				:= $(DRIVER_OBJS) init.o backtrace.o
-oprofile-$(CONFIG_X86_LOCAL_APIC) 	+= nmi_int.o op_model_amd.o \
+oprofile-$(CONFIG_X86_LOCAL_APIC)	+= nmi_int.o op_model_amd.o \
 					   op_model_ppro.o op_model_p4.o
diff --git a/arch/x86/pci/Makefile b/arch/x86/pci/Makefile
index 3af5a1e..18ae3da 100644
--- a/arch/x86/pci/Makefile
+++ b/arch/x86/pci/Makefile
@@ -7,11 +7,11 @@ obj-$(CONFIG_PCI_OLPC)		+= olpc.o
 obj-$(CONFIG_PCI_XEN)		+= xen.o
 
 obj-y				+= fixup.o
-obj-$(CONFIG_X86_INTEL_CE)      += ce4100.o
+obj-$(CONFIG_X86_INTEL_CE)	+= ce4100.o
 obj-$(CONFIG_ACPI)		+= acpi.o
 obj-y				+= legacy.o irq.o
 
-obj-$(CONFIG_STA2X11)           += sta2x11-fixup.o
+obj-$(CONFIG_STA2X11)		+= sta2x11-fixup.o
 
 obj-$(CONFIG_X86_VISWS)		+= visws.o
 
diff --git a/arch/x86/platform/efi/Makefile b/arch/x86/platform/efi/Makefile
index 73b8be0..709de1f 100644
--- a/arch/x86/platform/efi/Makefile
+++ b/arch/x86/platform/efi/Makefile
@@ -1 +1 @@
-obj-$(CONFIG_EFI) 		+= efi.o efi_$(BITS).o efi_stub_$(BITS).o
+obj-$(CONFIG_EFI)		+= efi.o efi_$(BITS).o efi_stub_$(BITS).o
diff --git a/arch/x86/platform/olpc/Makefile b/arch/x86/platform/olpc/Makefile
index fd332c5..bb26fdc 100644
--- a/arch/x86/platform/olpc/Makefile
+++ b/arch/x86/platform/olpc/Makefile
@@ -1,5 +1,5 @@
 obj-$(CONFIG_OLPC)		+= olpc.o olpc_ofw.o olpc_dt.o
-obj-$(CONFIG_OLPC_XO1_PM)		+= olpc-xo1-pm.o xo1-wakeup.o
+obj-$(CONFIG_OLPC_XO1_PM)	+= olpc-xo1-pm.o xo1-wakeup.o
 obj-$(CONFIG_OLPC_XO1_RTC)	+= olpc-xo1-rtc.o
 obj-$(CONFIG_OLPC_XO1_SCI)	+= olpc-xo1-sci.o
 obj-$(CONFIG_OLPC_XO15_SCI)	+= olpc-xo15-sci.o
diff --git a/arch/x86/realmode/Makefile b/arch/x86/realmode/Makefile
index 94f7fbe..6eb6b0c 100644
--- a/arch/x86/realmode/Makefile
+++ b/arch/x86/realmode/Makefile
@@ -7,10 +7,10 @@
 #
 #
 
-subdir- := rm
+subdir-	:= rm
 
-obj-y += init.o
-obj-y += rmpiggy.o
+obj-y	+= init.o
+obj-y	+= rmpiggy.o
 
 $(obj)/rmpiggy.o: $(obj)/rm/realmode.bin
 
diff --git a/arch/x86/realmode/rm/Makefile b/arch/x86/realmode/rm/Makefile
index 5b84a2d..ee67afb 100644
--- a/arch/x86/realmode/rm/Makefile
+++ b/arch/x86/realmode/rm/Makefile
@@ -79,4 +79,4 @@ KBUILD_CFLAGS	:= $(LINUXINCLUDE) -m32 -g -Os -D_SETUP -D__KERNEL__ -D_WAKEUP \
 		   $(call cc-option, -fno-stack-protector) \
 		   $(call cc-option, -mpreferred-stack-boundary=2)
 KBUILD_AFLAGS	:= $(KBUILD_CFLAGS) -D__ASSEMBLY__
-GCOV_PROFILE := n
+GCOV_PROFILE	:= n
diff --git a/arch/x86/tools/Makefile b/arch/x86/tools/Makefile
index 733057b..d559bf8 100644
--- a/arch/x86/tools/Makefile
+++ b/arch/x86/tools/Makefile
@@ -1,15 +1,15 @@
 PHONY += posttest
 
 ifeq ($(KBUILD_VERBOSE),1)
-  posttest_verbose = -v
+	posttest_verbose = -v
 else
-  posttest_verbose =
+	posttest_verbose =
 endif
 
 ifeq ($(CONFIG_64BIT),y)
-  posttest_64bit = -y
+	posttest_64bit = -y
 else
-  posttest_64bit = -n
+	posttest_64bit = -n
 endif
 
 distill_awk = $(srctree)/arch/x86/tools/distill.awk
diff --git a/arch/x86/um/os-Linux/Makefile b/arch/x86/um/os-Linux/Makefile
index 253bfb8..97beee9 100644
--- a/arch/x86/um/os-Linux/Makefile
+++ b/arch/x86/um/os-Linux/Makefile
@@ -5,8 +5,8 @@
 
 obj-y = registers.o task_size.o mcontext.o
 
-obj-$(CONFIG_X86_32) += tls.o
-obj-$(CONFIG_64BIT) += prctl.o
+obj-$(CONFIG_X86_32)	+= tls.o
+obj-$(CONFIG_64BIT)	+= prctl.o
 
 USER_OBJS := $(obj-y)
 
diff --git a/arch/x86/um/vdso/Makefile b/arch/x86/um/vdso/Makefile
index 6c803ca..38c0c2c 100644
--- a/arch/x86/um/vdso/Makefile
+++ b/arch/x86/um/vdso/Makefile
@@ -22,7 +22,7 @@ targets += vdso.so vdso.so.dbg vdso.lds $(vobjs-y)
 export CPPFLAGS_vdso.lds += -P -C
 
 VDSO_LDFLAGS_vdso.lds = -m64 -Wl,-soname=linux-vdso.so.1 \
-       -Wl,-z,max-page-size=4096 -Wl,-z,common-page-size=4096
+	-Wl,-z,max-page-size=4096 -Wl,-z,common-page-size=4096
 
 $(obj)/vdso.o: $(src)/vdso.S $(obj)/vdso.so
 
@@ -38,8 +38,8 @@ $(obj)/%.so: $(obj)/%.so.dbg FORCE
 # optimize sibling calls.
 #
 CFL := $(PROFILING) -mcmodel=small -fPIC -O2 -fasynchronous-unwind-tables -m64 \
-       $(filter -g%,$(KBUILD_CFLAGS)) $(call cc-option, -fno-stack-protector) \
-       -fno-omit-frame-pointer -foptimize-sibling-calls
+	$(filter -g%,$(KBUILD_CFLAGS)) $(call cc-option, -fno-stack-protector) \
+	-fno-omit-frame-pointer -foptimize-sibling-calls
 
 $(vobjs): KBUILD_CFLAGS += $(CFL)
 
@@ -49,8 +49,8 @@ $(vobjs): KBUILD_CFLAGS += $(CFL)
 CFLAGS_REMOVE_vdso-note.o = -pg -fprofile-arcs -ftest-coverage
 CFLAGS_REMOVE_um_vdso.o = -pg -fprofile-arcs -ftest-coverage
 
-targets += vdso-syms.lds
-obj-$(VDSO64-y)			+= vdso-syms.lds
+targets		+= vdso-syms.lds
+obj-$(VDSO64-y)	+= vdso-syms.lds
 
 #
 # Match symbols in the DSO that look like VDSO*; produce a file of constants.
@@ -70,9 +70,9 @@ $(obj)/%-syms.lds: $(obj)/%.so.dbg FORCE
 #
 quiet_cmd_vdso = VDSO    $@
       cmd_vdso = $(CC) -nostdlib -o $@ \
-		       $(VDSO_LDFLAGS) $(VDSO_LDFLAGS_$(filter %.lds,$(^F))) \
-		       -Wl,-T,$(filter %.lds,$^) $(filter %.o,$^) && \
-		 sh $(srctree)/$(src)/checkundef.sh '$(NM)' '$@'
+		$(VDSO_LDFLAGS) $(VDSO_LDFLAGS_$(filter %.lds,$(^F))) \
+		-Wl,-T,$(filter %.lds,$^) $(filter %.o,$^) && \
+		sh $(srctree)/$(src)/checkundef.sh '$(NM)' '$@'
 
 VDSO_LDFLAGS = -fPIC -shared $(call cc-ldoption, -Wl$(comma)--hash-style=sysv)
 GCOV_PROFILE := n
diff --git a/arch/x86/vdso/Makefile b/arch/x86/vdso/Makefile
index fd14be1..8a301bc 100644
--- a/arch/x86/vdso/Makefile
+++ b/arch/x86/vdso/Makefile
@@ -35,7 +35,7 @@ export CPPFLAGS_vdso.lds += -P -C
 
 VDSO_LDFLAGS_vdso.lds = -m64 -Wl,-soname=linux-vdso.so.1 \
 			-Wl,--no-undefined \
-		      	-Wl,-z,max-page-size=4096 -Wl,-z,common-page-size=4096
+			-Wl,-z,max-page-size=4096 -Wl,-z,common-page-size=4096
 
 $(obj)/vdso.o: $(src)/vdso.S $(obj)/vdso.so
 
@@ -51,8 +51,8 @@ $(obj)/%.so: $(obj)/%.so.dbg FORCE
 # optimize sibling calls.
 #
 CFL := $(PROFILING) -mcmodel=small -fPIC -O2 -fasynchronous-unwind-tables -m64 \
-       $(filter -g%,$(KBUILD_CFLAGS)) $(call cc-option, -fno-stack-protector) \
-       -fno-omit-frame-pointer -foptimize-sibling-calls
+	$(filter -g%,$(KBUILD_CFLAGS)) $(call cc-option, -fno-stack-protector) \
+	-fno-omit-frame-pointer -foptimize-sibling-calls
 
 $(vobjs): KBUILD_CFLAGS += $(CFL)
 
@@ -133,9 +133,9 @@ VDSO_LDFLAGS_vdso32.lds = -m32 -Wl,-soname=linux-gate.so.1
 # is not a kbuild sub-make subdirectory.
 override obj-dirs = $(dir $(obj)) $(obj)/vdso32/
 
-targets += vdso32/vdso32.lds
-targets += $(vdso32-images) $(vdso32-images:=.dbg)
-targets += vdso32/note.o $(vdso32.so-y:%=vdso32/%.o)
+targets	+= vdso32/vdso32.lds
+targets	+= $(vdso32-images) $(vdso32-images:=.dbg)
+targets	+= vdso32/note.o $(vdso32.so-y:%=vdso32/%.o)
 
 extra-y	+= $(vdso32-images)
 
diff --git a/arch/x86/video/Makefile b/arch/x86/video/Makefile
index 2c447c9..0d63a4a 100644
--- a/arch/x86/video/Makefile
+++ b/arch/x86/video/Makefile
@@ -1 +1 @@
-obj-$(CONFIG_FB)               += fbdev.o
+obj-$(CONFIG_FB)	+= fbdev.o
diff --git a/arch/x86/xen/Makefile b/arch/x86/xen/Makefile
index 96ab2c0..f1333c3 100644
--- a/arch/x86/xen/Makefile
+++ b/arch/x86/xen/Makefile
@@ -15,7 +15,7 @@ obj-y		:= enlighten.o setup.o multicalls.o mmu.o irq.o \
 			grant-table.o suspend.o platform-pci-unplug.o \
 			p2m.o
 
-obj-$(CONFIG_EVENT_TRACING) += trace.o
+obj-$(CONFIG_EVENT_TRACING)	+= trace.o
 
 obj-$(CONFIG_SMP)		+= smp.o
 obj-$(CONFIG_PARAVIRT_SPINLOCKS)+= spinlock.o
-- 
 Kirill A. Shutemov

^ permalink raw reply related	[flat|nested] 8+ messages in thread

* Re: [GIT PULL] x86/build change for v3.6
  2012-07-22 14:22   ` Ingo Molnar
  2012-07-23  9:35     ` Kirill A. Shutemov
@ 2012-07-25 20:15     ` Sam Ravnborg
  2012-07-25 20:18       ` H. Peter Anvin
  2012-07-26  6:55       ` Ingo Molnar
  1 sibling, 2 replies; 8+ messages in thread
From: Sam Ravnborg @ 2012-07-25 20:15 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: Kirill A. Shutemov, Linus Torvalds, linux-kernel, H. Peter Anvin,
	Thomas Gleixner, Andrew Morton

> 
> No, the reason for the odd looking diff is that lots of lines in 
> arch/x86/Makefile have 8-space tabs for histerical reasons but 
> new code (such as this one) has proper tabs.

Use of tabs for indent in a Makefile is just asking for trouble.
Consider following simple Makefile:

$ cat Makefile
bar:
#bla bla
        foo = war

love:
	@echo make love, not $(foo)

If you execute:
    $make love
    make love, not war

But if you replace the 8 spaces in front of the assignment
with a tab then suddenly the output looks like this:
    $make love
    make love, not

This is not as expected....
In this silly example it is maybe obvious but I have lost hours tracking
down bugs due to this.
You add a new target and suddenly someting unrelated breaks.

What happens is that make consider the assignment a command due to the leading
tab - and because is follows a target (or other commands).

I hope this makes it clear why many makefiles in the kernel uses tabs for indent.

	Sam

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [GIT PULL] x86/build change for v3.6
  2012-07-25 20:15     ` Sam Ravnborg
@ 2012-07-25 20:18       ` H. Peter Anvin
  2012-07-26  6:55       ` Ingo Molnar
  1 sibling, 0 replies; 8+ messages in thread
From: H. Peter Anvin @ 2012-07-25 20:18 UTC (permalink / raw)
  To: Sam Ravnborg
  Cc: Ingo Molnar, Kirill A. Shutemov, Linus Torvalds, linux-kernel,
	Thomas Gleixner, Andrew Morton

On 07/25/2012 01:15 PM, Sam Ravnborg wrote:
>
> This is not as expected....
> In this silly example it is maybe obvious but I have lost hours tracking
> down bugs due to this.
> You add a new target and suddenly someting unrelated breaks.
>
> What happens is that make consider the assignment a command due to the leading
> tab - and because is follows a target (or other commands).
>
> I hope this makes it clear why many makefiles in the kernel uses tabs for indent.
>

This is also a good reason why not to indent assignments in Makefiles by 
full tab stops.  A smaller indent can't be scrambled this way.

	-hpa


-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.


^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [GIT PULL] x86/build change for v3.6
  2012-07-25 20:15     ` Sam Ravnborg
  2012-07-25 20:18       ` H. Peter Anvin
@ 2012-07-26  6:55       ` Ingo Molnar
  2012-07-29 20:42         ` Sam Ravnborg
  1 sibling, 1 reply; 8+ messages in thread
From: Ingo Molnar @ 2012-07-26  6:55 UTC (permalink / raw)
  To: Sam Ravnborg
  Cc: Kirill A. Shutemov, Linus Torvalds, linux-kernel, H. Peter Anvin,
	Thomas Gleixner, Andrew Morton


* Sam Ravnborg <sam@ravnborg.org> wrote:

> > 
> > No, the reason for the odd looking diff is that lots of lines in 
> > arch/x86/Makefile have 8-space tabs for histerical reasons but 
> > new code (such as this one) has proper tabs.
> 
> Use of tabs for indent in a Makefile is just asking for 
> trouble.

Ok, I guess you are right - see the patch below which was 
another type of bug that could be introduced via not using 
spaces properly.

We could do it the other way around: turn all tabs into spaces 
and add Makefile checking in kbuild so that the build fails if
a tab is added to a Makefile?

Alternatively, is there perhaps some way to teach make to not be 
so broken to depend on whitespace details that are *invisible* 
to humans?

Thanks,

	Ingo

Index: linux/arch/x86/Makefile
===================================================================
--- linux.orig/arch/x86/Makefile
+++ linux/arch/x86/Makefile
@@ -96,7 +96,7 @@ ifdef CONFIG_X86_X32
 		KBUILD_AFLAGS += -DCONFIG_X86_X32_ABI
 		KBUILD_CFLAGS += -DCONFIG_X86_X32_ABI
 	else
-		$(warning CONFIG_X86_X32 enabled but no binutils support)
+ 		$(warning CONFIG_X86_X32 enabled but no binutils support)
 	endif
 endif
 export CONFIG_X86_X32_ABI

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [GIT PULL] x86/build change for v3.6
  2012-07-26  6:55       ` Ingo Molnar
@ 2012-07-29 20:42         ` Sam Ravnborg
  0 siblings, 0 replies; 8+ messages in thread
From: Sam Ravnborg @ 2012-07-29 20:42 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: Kirill A. Shutemov, Linus Torvalds, linux-kernel, H. Peter Anvin,
	Thomas Gleixner, Andrew Morton

On Thu, Jul 26, 2012 at 08:55:06AM +0200, Ingo Molnar wrote:
> 
> * Sam Ravnborg <sam@ravnborg.org> wrote:
> 
> > > 
> > > No, the reason for the odd looking diff is that lots of lines in 
> > > arch/x86/Makefile have 8-space tabs for histerical reasons but 
> > > new code (such as this one) has proper tabs.
> > 
> > Use of tabs for indent in a Makefile is just asking for 
> > trouble.
> 
> Ok, I guess you are right - see the patch below which was 
> another type of bug that could be introduced via not using 
> spaces properly.
> 
> We could do it the other way around: turn all tabs into spaces 
> and add Makefile checking in kbuild so that the build fails if
> a tab is added to a Makefile?
> 
> Alternatively, is there perhaps some way to teach make to not be 
> so broken to depend on whitespace details that are *invisible* 
> to humans?
We can teach make to use something else - say "€" - as the command idicator.
But that would confuse people a lot.

If we follow hpa's suggestion to use 4 spaces as indent then it
more obvious that we do not use tabs for indent.
For that matter we could consider 3 spaces - so two indents is not
the same as one tab.

If we one day use a tool for parsing up all the kbuild files
then we could always add checks in that tool.
but today make does not allow us to do so.

At least not that I know.

	Sam

^ permalink raw reply	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2012-07-29 20:42 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2012-07-22 13:44 [GIT PULL] x86/build change for v3.6 Ingo Molnar
2012-07-22 13:58 ` Kirill A. Shutemov
2012-07-22 14:22   ` Ingo Molnar
2012-07-23  9:35     ` Kirill A. Shutemov
2012-07-25 20:15     ` Sam Ravnborg
2012-07-25 20:18       ` H. Peter Anvin
2012-07-26  6:55       ` Ingo Molnar
2012-07-29 20:42         ` Sam Ravnborg

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