Re: [PATCH] ioremap_cached()

[Kumar Gala]

On Mar 30, 2006, at 2:17 PM, Andi Kleen wrote:

> On Thursday 30 March 2006 22:14, Matthew Wilcox wrote:
>
> > I think you misunderstood.  The right interface to call, that should
> > work everywhere, should be the simple, obvious one.  ioremap().  That
> > effectively is what everyone gets anyway (since they test on x86).
> > So change the *definition* of ioremap() to be uncached.  Then we  
> > can add
> > ioremap_wc() and ioremap_cached() for these special purpose mappings.
>
> That would break all the current users who do ioremap on memory
> and want it cached.

What's an example of this?  I ask since on powerpc ioremap() is  
always _PAGE_NO_CACHE.

- kumar
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