Messages in this thread | | | Date | Wed, 13 Nov 2019 11:31:54 +0200 | From | Andy Shevchenko <> | Subject | Re: [PATCH] video: fbdev: atyfb: only use ioremap_uc() on i386 and ia64 |
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On Wed, Nov 13, 2019 at 08:38:15AM +0100, Arnd Bergmann wrote: > On Wed, Nov 13, 2019 at 8:27 AM Christoph Hellwig <hch@lst.de> wrote: > > > > On Tue, Nov 12, 2019 at 10:24:23PM +0000, Luis Chamberlain wrote: > > > I think this would be possible if we could flop ioremap_nocache() to UC > > > instead of UC- on x86. Otherwise, I can't see how we can remove this by > > > still not allowing direct MTRR calls. > > > > If everything goes well ioremap_nocache will be gone as of 5.5. > > As ioremap_nocache() just an alias for ioremap(), I suppose the idea would > then be to make x86 ioremap be UC instead of UC-, again matching what the > other architectures do already.
I think it's right thing to do, i.e. assume that ioremap() always does strong UC independently on MTRR settings.
-- With Best Regards, Andy Shevchenko
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