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Date:	Sun, 31 Aug 2014 11:49:41 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	Sam Ravnborg <sam@...nborg.org>
CC:	linux-kernel@...r.kernel.org, linux-cris-kernel@...s.com,
	Jesper Nilsson <jesper.nilsson@...s.com>,
	Mikael Starvik <starvik@...s.com>,
	Grant Likely <grant.likely@...aro.org>,
	"Edgar E. Iglesias" <edgar.iglesias@...il.com>
Subject: Re: Status of 'cris' architecture support in Linux kernel

On 08/31/2014 11:33 AM, Sam Ravnborg wrote:
> On Sun, Aug 31, 2014 at 10:50:10AM -0700, Guenter Roeck wrote:
>> The idea was to create a crisv32 kernel and initramfs to work with qemu
>> for the ongoing Linux kernel test project.
>>
>> After spending a number of days (and nights) on it, the results don't look
>> very encouraging.
>>
>> My overall conclusion is that 'cris' architecture support in the Linux kernel
>> is in bad shape, does not work anymore, and would require substantial effort
>> to get it into working state.
>>
>> Anyway, below are my individual findings. If there is an ongoing effort to
>> improve cris support in the upstream kernel, specifically support for crisv32,
>> please let me know. I'll be happy to test the resulting kernels.
>
> Jesper is on parental leave so do not expect any prompt reply from him.
>
>>
>> Individual findings:
>>
>> headers_install
>>
>> make ARCH=cris INSTALL_HDR_PATH=/tmp headers_install
>>
>> results in:
>>
>> ./scripts/Makefile.headersinst:14: arch/cris/include/uapi/asm/arch-v10/Kbuild:
>> 	No such file or directory
>> make[2]: *** No rule to make target `arch/cris/include/uapi/asm/arch-v10/Kbuild'.  Stop.
> I have already sent a fix for this that Michael said he wanted to deal with.
>

Hi Sam,

That is great. Note there is a second part besides the failure itself:
The resulting installed headers don't work and need a post-installation
patch, as mentioned in my previous e-mail. Would be great if you can
look into this as well (if you did not do so already).

Thanks,
Guenter

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