linux-kernel - Re: Status of 'cris' architecture support in Linux kernel

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Date:	Mon, 1 Sep 2014 05:49:11 +0200
From:	Mikael Starvik <mikael.starvik@...s.com>
To:	Sam Ravnborg <sam@...nborg.org>
CC:	Guenter Roeck <linux@...ck-us.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-cris-kernel <linux-cris-kernel@...s.com>,
	Jesper Nilsson <jespern@...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

Jesper is actually back at work today but give him a few days to catch up.


> 31 aug 2014 kl. 20:51 skrev "Sam Ravnborg" <sam@...nborg.org>:
> 
>> 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.
> 
>    Sam
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