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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