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Subject: Re: [PATCH V2 2/3] powerpc: Add support for swiotlb on 32-bit
From: Ian Campbell <Ian.Campbell@eu.citrix.com>
To: Becky Bruce <beckyb@kernel.crashing.org>
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Date: Wed, 27 May 2009 21:29:19 +0100
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Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>,
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On Wed, 2009-05-27 at 15:05 -0400, Becky Bruce wrote:
> On May 22, 2009, at 6:11 AM, Ian Campbell wrote:
> >
> >
> > BTW do you need swiotlb_bus_to_virt to be __weak or is the fact that  
> > it
> > is implemented in terms of swiotlb_bus_to_phys sufficient?
> 
> The default one in swiotlb calls phys_to_virt on the result of  
> swiotlb_bus_to_phys, which only works on lowmem.

Perhaps we can simply enhance the default one to handle highmem instead
of making it arch specific?

Ian.