Re: [Patch] i386: remove 'usedac' kernel parameter

[Cong Wang]

FUJITA Tomonori wrote:
> On Wed, 9 Dec 2009 01:25:48 -0500
> Amerigo Wang <amwang@xxxxxxxxxx> wrote:
>
> > It is scheduled to be removed.
> >
> > Signed-off-by: WANG Cong <amwang@xxxxxxxxxx>
> > Cc: Glauber Costa <gcosta@xxxxxxxxxx>
> > Cc: Ingo Molnar <mingo@xxxxxxx>
> >
> > ---
> > diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
> > index 591e944..8c895f6 100644
> > --- a/Documentation/feature-removal-schedule.txt
> > +++ b/Documentation/feature-removal-schedule.txt
> > @@ -291,13 +291,6 @@ Who:	Michael Buesch <mb@xxxxxxxxx>
> >  
> >  ---------------------------
> >  
> > -What:	usedac i386 kernel parameter
> > -When:	2.6.27
> > -Why:	replaced by allowdac and no dac combination
> > -Who:	Glauber Costa <gcosta@xxxxxxxxxx>
> > -
> > ----------------------------
> > -
>
> I'm not sure about the above description, I'm not against removing
> this option though.
>
> IIUC, the usedac option enables us to stop via_no_dac() setting
> forbid_dac to 1. That is, someone who uses VIA bridges can use DAC
> with this option even if some of VIA bridges seem to be broken about
> DAC. I can't see how we can do the same thing with "allowdac" and
> "nodac" combination.


Hmm, yes, right, I missed this point.

Thanks!
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