Re: [patch] ioremap sanity check to catch mapping requestsexceeding the BAR sizes
From: Alan Cox
Date: Sat Sep 27 2008 - 12:27:34 EST
On Sat, 27 Sep 2008 07:43:55 -0700
Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote:
> Alan Cox wrote:
> >> Any attempt to use ioremap on memory is a bug, so you should warn about
> >> that too.
> >>
> >
> > We use it to ioremap things like the BIOS...
>
> Yeah, that's fine. I mean using ioremap on system memory is a bug.
On system memory mapped by the kernel which I assume is what you mean -
the BIOS is often shadowed system memory and we have platforms where
memory pages not mapped into or managed the OS are ioremap() targets.
That however is getting pedantic - I just didn't want anyone to overdo
the sanity checks
Alan
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