Re: Problem with remap_page_range

[Matt Porter]

On Wed, Sep 10, 2003 at 09:54:20AM +1200, Dmytro Bablinyuk wrote:
> >
> >
> >>  if (remap_page_range(vma->vm_start,
> >>                       DSP_ADDR,
> >>                       size,
> >>                       vma->vm_page_prot
> >>                       ))
> >>    
> >>
> >
> >Your remap call isn't adding _PAGE_NO_CACHE and _PAGE_GUARDED flags
> >like ioremap_nocache()/ioremap() do on PPC.  You'll get bad results
> >because of the ordering and cache issues resulting from not using
> >these PTE flags.  In 2.6, these can be added using pgprot_noncached()
> >that is defined per-arch.
> >
> >  
> >
> Thank you Matt,
> 
> Coud you please give me en example on how to add these flags to remap in 
> kernel 2.4.21 (powerpc).
> It seems I could not find these flags available in my kernel.

They're defined in include/asm-ppc/pgtable.h

-Matt
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