Messages in this thread | | | Date | Tue, 06 Mar 2007 23:42:36 -0500 | From | Andres Salomon <> | Subject | Re: [PATCH] mm: don't use ZONE_DMA unless CONFIG_ZONE_DMA is set in setup.c |
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Dave Jones wrote: > On Tue, Mar 06, 2007 at 05:52:46PM -0800, Andrew Morton wrote: > > On Tue, 06 Mar 2007 18:52:59 -0500 > > Andres Salomon <dilinger@debian.org> wrote: > > > > > If CONFIG_ZONE_DMA is ever undefined, ZONE_DMA will also not be defined, > > > and setup.c won't compile. This wraps it with an #ifdef. > > > > > > > I guess if anyone tries to disable ZONE_DMA on i386 they'll pretty quickly > > discover that. But I don't think we need to "fix" it yet?
Oh, it's certainly not urgent. I sent it simply for correctness reasons.
It would've been nice to see the ZONE_DMA removal patches just #define ZONE_DMA regardless, and include less #ifdefs scattered about; but at this point, I'd just as soon prefer to see a proper way to allocate things based on address constraints (as discussed in http://www.gelato.unsw.edu.au/archives/linux-ia64/0609/19036.html).
> > CONFIG_ZONE_DMA isn't even optional on i386, so I'm curious how > you could hit this compile failure. >
Why, with custom code of course ;)
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