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

[Guenter Roeck]

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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