Quoting r. Anton Blanchard [off-list ref]:

Subject: Re: [PATCH 38 of 39] IB/ipath - More changes to support InfiniPath on PowerPC 970 systems

 
Hi,

quoted

Please fix the generic code if it doesn't provide the facility
you need at the moment.  Don't shoe horn it into your driver
just to make up for that.

Ive had 3 drivers asking for write combining recently so I agree this is
a good idea. How about ioremap_wc as suggested by Willy:

http://marc.theaimsgroup.com/?l=linux-kernel&m=114374741828040&w=2

Hmm ... I think ioremap_wc isn't sufficient by itself to make drivers using
write-combined memory, portable.  Here's another thread on a related subject:

http://lkml.org/lkml/2006/2/24/347

-- 
MST