Messages in this thread | | | Date | Sat, 27 Sep 2008 17:25:46 +0100 | From | Alan Cox <> | Subject | Re: [patch] ioremap sanity check to catch mapping requests exceeding the BAR sizes |
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On Sat, 27 Sep 2008 07:43:55 -0700 Jeremy Fitzhardinge <jeremy@goop.org> 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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