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Date: Tue, 09 Mar 2010 00:23:32 +0100
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
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Subject: Re: [Xenomai-help] BUG: Bad page map
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To: "Steven A. Falco" <sfalco@domain.hid>
Cc: xenomai-help <xenomai@xenomai.org>

Gilles Chanteperdrix wrote:
> Steven A. Falco wrote:
>> Steven A. Falco wrote:
>>> I'm beginning to write an RTDM driver for a custom PCI
>>> device.  The plan is to map the device registers into
>>> user space, and deal with all the details in a Xenomai
>>> process.  However, I ran into crashes trying to access
>>> the device's memory from user space (via mmap in the RTDM
>>> driver).
>> Turns out to behave the same without IPIPE/Xenomai.  I'll
>> repost on the ppc dev list.
> 
> ISTR it is a known issue, and has been fixed. If that is the case,
> latest I-pipes (such as 2.6.30.3-powerpc-DENX-2.7-06), should contain a
> fix. Please give it a try.

It so happens that 2.6.30 contains the fix for the bug I seemed to remember:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=fbc78b07ba53ace155f27491c81a009e541a93ad

So, you probably have another problem, and should, as you said, post on
the ppc dev list.

-- 
					    Gilles.