linux-kernel - [RFC PATCH] Add CONFIG_BITS to remove the test in arch/x86/Makefile

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Date:	Mon, 26 Nov 2007 14:36:07 +0100
From:	Loic Grenie <loic.grenie@...il.com>
To:	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: [RFC PATCH] Add CONFIG_BITS to remove the test in arch/x86/Makefile

    I propose the following patch to arch/x86/Makefile and Kconfig.

Actions:

     - Add a BITS variable to Kconfig which takes value 32 or 64 according
       to 64BIT.
     - Modify arch/x86/Makefile to use CONFIG_BITS instead of testing
       ARCH.

How this could be expanded:

     - Either remove BITS from arch/x86/Makefile_?? or change its definition
       (I expect to do one of those if my patch is accepted).
     - Add it to other arhitectures ? Maybe CONFIG_BITS could be useful
       somewhere in the code ?


    Kindly,

        Loïc Grenié


Signed-off-by: Loïc Grenié <loic.grenie@...il.com>
---
 arch/x86/Kconfig  |    5 +++++
 arch/x86/Makefile |    9 ++-------
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 368864d..c0935fd 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -15,6 +15,11 @@ config X86_32
 config X86_64
 	def_bool 64BIT
 
+config BITS
+	int
+	default "64" if 64BIT
+	default "32"
+
 ### Arch settings
 config X86
 	bool
diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 116b03a..035adba 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -10,11 +10,6 @@ endif
 # No need to remake these files
 $(srctree)/arch/x86/Makefile%: ;
 
-ifeq ($(CONFIG_X86_32),y)
-        include $(srctree)/arch/x86/Makefile_32
-else
-        include $(srctree)/arch/x86/Makefile_64
-endif
-
-
+CONFIG_BITS ?= 32
 
+include $(srctree)/arch/x86/Makefile_$(CONFIG_BITS)
-- 
1.5.3.4

-
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