linux-kernel - Re: howto use ioremap

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Date:	Mon, 2 Jun 2008 19:18:32 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	Brice Goglin <brice@...i.com>
Cc:	LKML <linux-kernel@...r.kernel.org>, netdev@...r.kernel.org,
	"venkatesh.pallipadi@...el.com" <venkatesh.pallipadi@...el.com>
Subject: Re: howto use ioremap_wc?

On Mon, 02 Jun 2008 18:27:31 +0200
Brice Goglin <brice@...i.com> wrote:


> 
> Agreed, that would be nice!
> 
> >From what we discussed here after your reply, our plan is now to just
> replace
>     ioremap+mtrr_add

which doesn't work as ioremap() may/will force uncached ;)


> with
>     ioremap_wc+mtrr_add
> 
> If mtrr_add() is moved into ioremap_wc(), we'll remove it from
> myri10ge. For now, when PAT is enabled, we may have PAT + MTRR both
> doing WC, but I don't think it can break anything, right?

Both having WC is nicely consistent and the right thing happens...

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