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Subject: Re: [PATCH] parisc: Regenerate parisc defconfigs
To:     Helge Deller <deller@gmx.de>
Cc:     linux-parisc@vger.kernel.org, linux-kernel@vger.kernel.org
References: <20200326202006.GA160630@roeck-us.net>
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From:   Guenter Roeck <linux@roeck-us.net>
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Message-ID: <d83868cb-12cd-054e-db85-bcbb9121683a@roeck-us.net>
Date:   Thu, 26 Mar 2020 23:43:01 -0700
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On 3/26/20 3:19 PM, Helge Deller wrote:
> * Guenter Roeck <linux@roeck-us.net>:
>> On Mon, Feb 03, 2020 at 10:31:22PM +0100, Helge Deller wrote:
>>> Regenerate the 32- and 64-bit defconfigs and drop the outdated specific
>>> machine defconfigs for the 712, A500, B160, C3000 and C8000 workstations.
>>> ---
>>>  arch/parisc/configs/712_defconfig           | 181 ---------------
>>>  arch/parisc/configs/a500_defconfig          | 177 ---------------
>>>  arch/parisc/configs/defconfig               | 206 -----------------
>>
>> Since the removal of arch/parisc/configs/defconfig, "make ARCH=parisc
>> defconfig" results in an endless recursive make loop.
> 
> Can you please test the patch below?
> Helge
> 
> ----
> [PATCH] parisc: Fix defconfig selection
> 
> Fix the recursive loop when running "make ARCH=parisc defconfig".
> 
> Fixes: 84669923e1ed ("parisc: Regenerate parisc defconfigs")
> Noticed-by: Guenter Roeck <linux@roeck-us.net>
> Signed-off-by: Helge Deller <deller@gmx.de>

This works.

Tested-by: Guenter Roeck <linux@roeck-us.net>

It would be nice if there was a better way to select 32-bit
vs. 64-bit defconfigs (for example based on the compiler,
or with ARCH={parisc,parisc64}). However, that never worked
for parisc, so I guess we can't expect it to magically work
now, and much less so for a bug fix.

Thanks,
Guenter

> 
> diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
> index 71034b54d74e..3801a2ef9bca 100644
> --- a/arch/parisc/Kconfig
> +++ b/arch/parisc/Kconfig
> @@ -79,6 +79,11 @@ config MMU
>  config STACK_GROWSUP
>  	def_bool y
> 
> +config ARCH_DEFCONFIG
> +	string
> +	default "arch/parisc/configs/generic-32bit_defconfig" if !64BIT
> +	default "arch/parisc/configs/generic-64bit_defconfig" if 64BIT
> +
>  config GENERIC_LOCKBREAK
>  	bool
>  	default y
> diff --git a/arch/parisc/Makefile b/arch/parisc/Makefile
> index dca8f2de8cf5..628cd8bb7ad8 100644
> --- a/arch/parisc/Makefile
> +++ b/arch/parisc/Makefile
> @@ -34,6 +34,13 @@ CC_ARCHES	= hppa hppa2.0 hppa1.1
>  LD_BFD		:= elf32-hppa-linux
>  endif
> 
> +# select defconfig based on actual architecture
> +ifeq ($(shell uname -m),parisc64)
> +	KBUILD_DEFCONFIG := generic-64bit_defconfig
> +else
> +	KBUILD_DEFCONFIG := generic-32bit_defconfig
> +endif
> +
>  export LD_BFD
> 
>  ifneq ($(SUBARCH),$(UTS_MACHINE))
>