Patch [Port fixmap from x86 and use for kmap_atomic] breaks dma_noncoherent.c

[Gerhard Pircher]

Hi,

The commit "[POWERPC] Port fixmap from x86 and use for kmap_atomic" breaks
dma-noncoherent.c, if highmem is enabled.

> --- a/arch/powerpc/mm/pgtable_32.c
> +++ b/arch/powerpc/mm/pgtable_32.c
> @@ -387,3 +388,25 @@ void kernel_map_pages(struct page *page, int numpages, int enable)
>         change_page_attr(page, numpages, enable ? PAGE_KERNEL : __pgprot(0));
>  }
>  #endif /* CONFIG_DEBUG_PAGEALLOC */
> +
> +static int fixmaps;
> +unsigned long FIXADDR_TOP = 0xfffff000;
> +EXPORT_SYMBOL(FIXADDR_TOP);
> +
The address defined for FIXADDR_TOP seems to conflict with the address
defined by CONSISTENT_START (default 0xff100000). It triggers the
BUG_ON(!pte_none(*pte)) statement in __dma_alloc_coherent().

regards,

Gerhard

-- 
GMX startet ShortView.de. Hier findest Du Leute mit Deinen Interessen!
Jetzt dabei sein: http://www.shortview.de/?mc=sv_ext_mf@gmx