Re: [PATCH] ioremap_cached()

Kumar Gala
2006-03-30T20:21:24Z

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