Re: 2.6VMM, uClinux, & Comedi

From: Bernd Porr <BerndPorr_at_f2s.com> · Date: Mon, 01 Aug 2005 16:18:46 +0100

Looks quite promising. I would like to run comedi on a blackfin stamp. 
Please keep me in the loop.

/Bernd

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NZG wrote:
> I managed to successfully cross-compile Comedi for the Coldfire uClinux 2.6, 
> however it has several unresolved symbols when I try to load it.
> 
> comedi: Unknown symbol pgd_offset_k
> comedi: Unknown symbol pmd_none
> comedi: Unknown symbol remap_page_range
> comedi: Unknown symbol pte_present
> comedi: Unknown symbol pte_offset_kernel
> comedi: Unknown symbol VMALLOC_VMADDR
> comedi: Unknown symbol pte_page
> 
> Apparently uClinux isn't implementing these paged memory functions,which
> kind of makes sense, but I'm a little fuzzy on what the nommu code is
> supposed to be doing exactly, and I couldn't find any documentation on what 
> these functions are doing in the vanilla 2.6 kernel.
> Has anyone else been down this road before?
> I found Mel Gorman's Thesis on the 2.4 mm functions, but I couldn't find most 
> of these symbols in it.
> It's looking like the 2.6 mm stuff is still pretty undocumented, any links to 
> documentation (or short text explanations)would be appreciated. 
> 
> thx.
> NZG.
> 
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