Messages in this thread | | | Date | Fri, 4 Jun 2010 11:53:17 +0530 | Subject | Re: config automatically switches from 32-bit to 64-bit for x86 | From | Jaswinder Singh Rajput <> |
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Hello Michal and Sam,
On Thu, Jun 3, 2010 at 7:00 PM, Michal Marek <mmarek@suse.cz> wrote: > On Thu, May 27, 2010 at 08:46:53PM +0200, 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. > > Which is not acceptable, IMO. An x86_64 distro typically has a complete > 64bit userspace including /sbin/init, so the default kernel has to be > 64bit. > > What about always making the prompt visible, so that the previously set > value gets reused? The downside is that 'make ARCH=i386 menuconfig' in a > clean tree on x86_64 will default to 64bit, because it will find the > setting in the config of the running 64bit kernel :(. But after manually > turning CONFIG_64BIT off, the setting will be preserved. > > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig > index dcb0593..05ec418 100644 > --- a/arch/x86/Kconfig > +++ b/arch/x86/Kconfig > @@ -3,7 +3,7 @@ mainmenu "Linux Kernel Configuration for x86" > > # Select 32 or 64 bit > config 64BIT > - bool "64-bit kernel" if ARCH = "x86" > + bool "64-bit kernel" > default ARCH = "x86_64" > ---help--- > Say yes to build a 64-bit kernel - formerly known as x86_64 >
This patch works !!
Thanks, -- Jaswinder Singh. -- 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/
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