Re: [4/7] Xen VMM patch set : /dev/mem io_remap_page_range for CONFIG_XEN

["Randy.Dunlap" <rddunlap@osdl.org>]

Ian Pratt wrote:
>>>>@@ -42,7 +42,12 @@ extern void tapechar_init(void);
>>>>  */
>>>> static inline int uncached_access(struct file *file, unsigned long addr)
>>>
>>>Any chance you could just move uncached_access() to some asm/ header for
>>>all arches instead of making the ifdef mess even worse?
>>
>>I suppose a generic definition could go in asm-generic/iomap.h
>>with per-architecture definitions in asm/io.h.  However, I think
>>it would make sense to wait until PAT support gets added and then
>>think through exactly what needs doing rather than reorganising
>>things now.
> 
> 
> What do people think about this? Should I stick with the current
> patch that adds another #ifdef to uncached_access, or should I
> try pulling it out into asm-generic/iomap.h with per-arch
> definitions in asm/io.h ?
> 
> Is there anyone working on PAT support? It would be good to have
> their input.

Someone from NVidia has posted some PAT patches a few times.
(Terence Ripperda)  There's a thread beginning here:
http://marc.theaimsgroup.com/?l=linux-kernel&m=108180930118848&w=2

-- 
~Randy