From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755389Ab0E2RT3 (ORCPT ); Sat, 29 May 2010 13:19:29 -0400 Received: from mail-gy0-f174.google.com ([209.85.160.174]:54630 "EHLO mail-gy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754585Ab0E2RT2 convert rfc822-to-8bit (ORCPT ); Sat, 29 May 2010 13:19:28 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=jHxw1bpzRSim+/AnBrV8BgtjEfPbRzD3BD4tjTJzezuU8AnhoaWu55A3SHDh8dM522 66bE+NEczMA7a/Qky+6DqjESbZYSVLdadM8v48yenvZpH8leAGODG/kflBwxeFQvZeGW LR6/n1q4TNvphms3E6gOn5t86EILBRe1ldJdg= MIME-Version: 1.0 In-Reply-To: <20100529111951.GB31550@merkur.ravnborg.org> References: <20100527154916.GA5585@infradead.org> <20100527184653.GA11830@merkur.ravnborg.org> <20100529111951.GB31550@merkur.ravnborg.org> Date: Sat, 29 May 2010 22:49:25 +0530 Message-ID: Subject: Re: config automatically switches from 32-bit to 64-bit for x86 From: Jaswinder Singh Rajput To: Sam Ravnborg Cc: Christoph Hellwig , Ingo Molnar , Andrew Morton , "the arch/x86 maintainers" , Linux Kernel Mailing List , =?ISO-8859-1?Q?Am=E9rico_Wang?= Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello Sam and Américo, On Sat, May 29, 2010 at 4:49 PM, Sam Ravnborg wrote: > On Fri, May 28, 2010 at 03:37:00AM +0530, Jaswinder Singh Rajput wrote: >> Hello Sam, >> >> On Fri, May 28, 2010 at 12:16 AM, Sam Ravnborg wrote: >> > On Thu, May 27, 2010 at 11:49:16AM -0400, Christoph Hellwig wrote: >> >> On Thu, May 27, 2010 at 05:37:36AM +0530, Jaswinder Singh Rajput wrote: >> >> > Hello, >> >> > >> >> > I am trying to build 32 bit kernel image on 64-bit machine but after >> >> > 'make menuconfig' it automatically switches 32-bit to 64-bit. >> >> > >> >> > Is this a BUG or did intentionally. >> >> >> >> I think it's intentional, but I'm really annoyed by this behaviour. >> > >> > The request when we did the merge of 32 and 64 bit was that we >> > should continue to build 64bit kernels on 64 bit machines. >> > And likewise for 32bit. >> > Because this was what the users where used to. >> > >> > We could simplify metters by defining new rules. >> > As you suggest that uname on an intel box always resulted in ARCH=x86. >> > But then people would complain why a 32 bit kernel is default when >> > the box is 64 bit. >> > >> > Something like this: >> > [The escape chars align nicely in the patched Makefile] >> > >> >        Sam >> > >> > diff --git a/Makefile b/Makefile >> > index ebc8225..e7f97a5 100644 >> > --- a/Makefile >> > +++ b/Makefile >> > @@ -161,10 +161,11 @@ export srctree objtree VPATH >> >  # then ARCH is assigned, getting whatever value it gets normally, and >> >  # SUBARCH is subsequently ignored. >> > >> > -SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ >> > -                                 -e s/arm.*/arm/ -e s/sa110/arm/ \ >> > +SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/        \ >> > +                                 -e s/sun4u/sparc64/                    \ >> > +                                 -e s/arm.*/arm/ -e s/sa110/arm/        \ >> >                                  -e s/s390x/s390/ -e s/parisc64/parisc/ \ >> > -                                 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ >> > +                                 -e s/ppc.*/powerpc/ -e s/mips.*/mips/  \ >> >                                  -e s/sh[234].*/sh/ ) >> > >> >  # Cross compiling and selecting different set of gcc/bin-utils >> > >> > >> >> Thanks, this patch fixes the issue. Now 'make menuconfig' is following .config. > > If you think this is the right way to do things you can take it up > with the x86 maintainers. > > Although the patch touches only a generic file this is x86 specific. > Américo Wang, Do you mind handle this kconfig patch. Thanks, -- Jaswinder Singh.