From mboxrd@z Thu Jan  1 00:00:00 1970
From: Kars de Jong <jongk@linux-m68k.org>
Subject: Re: Kernel 2.6.24, binutils-2.18, and tftplilo on diskless MVME167.
Date: Thu, 13 Nov 2008 22:33:06 +0100
Message-ID: <1226611986.4267.16.camel@kars.perseus.home>
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	 <Pine.LNX.4.64.0811111055100.19341@anakin>
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To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Stephen N Chivers <schivers@csc.com.au>, Roman Zippel <zippel@linux-m68k.org>, Andreas Schwab <schwab@suse.de>, Debian GNU/Linux m68k <debian-68k@lists.debian.org>, Linux/m68k <linux-m68k@vger.kernel.org>

On di, 2008-11-11 at 11:01 +0100, Geert Uytterhoeven wrote:
> On Tue, 11 Nov 2008, Stephen N Chivers wrote:
> > In the past few days I have attempted to get 2.6 kernels booting on my
> > diskless MVME167 boards.
> > I have tried several kernels, including:
> > linux-image-2.6.26-1-mvme16x_2.6.26-9_m68k.deb.
> > 
> > I traced the "freeze" of the kernel to the 'BUG_ON' test in
> > 'm68k_setup_user_interrupt' in file
> > arch/m68k/ints.c:
> > 
> >       BUG_ON(IRQ_USER + cnt >= NR_IRQS);
> > 
> > Now, for the VME boards, IRQ_USER is 8, cnt is 192 and NR_IRQS is 200. So
> > this test will
> > trigger the BUG_ON action, and so the kernel appears to stop without
> > logging any diagnostics.
> 
> Oops, that looks like an off-by-one error.  It has been introduced by commit
> 69961c375288bdab7604e0bb1c8d22999bb8a347 ("[PATCH] m68k/Atari: Interrupt
> updates").

Hm, no fair! I already reported this bug back in 2006, asking for
feedback:

http://www.nabble.com/Re%3A-CVS-Update%3A-linux-tt6999670.html

... but I never got any ;)

By the way, I tested Linus' HEAD today (with your quilt patches, Geert)
on my MVME167, it only needed the above fixed and it booted.

I couldn't compile it with my old cross compiler (gcc version 4.1.3
20080623 (prerelease) (Debian 4.1.2-23)), it ICEed somewhere in
net/sunrpc. 

The new cross compiler I built after that (gcc version 4.3.2 (Debian
4.3.2-1)) had no problems with it.


Kind regards, Kars.