linux-kernel - [PATCH] x86: correctly set UTS

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Message-ID: <20071119225857.GA5129@devil>
Date:	Mon, 19 Nov 2007 23:58:57 +0100
From:	Andreas Herrmann <aherrman@...or.de>
To:	Sam Ravnborg <sam@...nborg.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Roman Zippel <zippel@...ux-m68k.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH] x86: correctly set UTS_MACHINE for "make ARCH=x86"

Upon request I have updated the patch description
and hope it is now more explanatory.

IMHO this should go into 2.6.24.
BTW, the patch was tested with v2.6.24-rc3-19-g2ffbb83.

Regards,

Andreas

--
x86: correctly set UTS_MACHINE for "make ARCH=x86"

For a kernel built with "make ARCH=x86" the following system
information is displayed when running the new kernel

    $ uname -m
    x86

On some i386 systems (e.g. K7) we even have the following information

    $ uname -m
    x66

This is weird. The usual information for "uname -m" should be "x86_64"
on 64-bit and "i386" or "i686" on 32-bit.

This patch fixes the issue by setting UTS_MACHINE to "i386" for 32-bit
kernel builds and to "x86_64" for 64-bit kernel builds. I.e., "x86"
won't be used for UTS_MACHINE anymore.

Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: "H. Peter Anvin" <hpa@...or.com>
Acked-by: Sam Ravnborg <sam@...nborg.org>
Signed-off-by: Andreas Herrmann <aherrman@...or.de>

---
 arch/x86/Makefile |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 116b03a..7aa1dc6 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -11,10 +11,9 @@ endif
 $(srctree)/arch/x86/Makefile%: ;

 ifeq ($(CONFIG_X86_32),y)
+        UTS_MACHINE := i386
         include $(srctree)/arch/x86/Makefile_32
 else
+        UTS_MACHINE := x86_64
         include $(srctree)/arch/x86/Makefile_64
 endif
-
-
-
-- 
1.5.3.4

-
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