Re: [PATCH 2/8] um: Do not use SUBARCH

Ramkumar Ramachandra
2013-09-26T13:13:57Z

Ramkumar Ramachandra wrote:
> Richard Weinberger wrote:
>> I told you already that "make defconfig ARCH=um SUBARCH=x86" will spuriously
>> create a x86_64 config on x86_64.
>> This breaks existing setups.
>
> I'll fix this and resubmit soon.

Wait a minute. You're now arguing about whether the generic "x86"
means i386 or x86_64. Its meaning is already defined in
arch/x86/Kconfig and arch/x86/um/Kconfig: see the config 64BIT. Unless
i386 is explicitly specified, the default is to build a 64-bit kernel.
That is already defined for a normal Linux kernel, and user-mode Linux
should not break that convention. So, in the example you pulled out of
your hat:

$ make defconfig ARCH=um SUBARCH=x86

the user should expect a 64-bit build, and not an i386 build as you
say. Both my patches are correct, and the "regression" that you
pointed out is a red herring.