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Date: Thu, 22 Jan 2009 17:28:44 +0100
From: Dimitry Andric <dimitry@andric.com>
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To: Michiel Boland <michiel@boland.org>
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Cc: freebsd-current@freebsd.org
Subject: Re: panic on boot with today's kernel
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On 2009-01-22 17:24, Michiel Boland wrote:
> panic: mutex ppc0 not owned at /usr/src/sys/dev/ppc/ppc.c:1983
...
> _mtx_assert(c5732a7c,4,c0bd3582,7bf,c56d4800,...) at _mtx_assert+0x87
> ppc_write_ivar(c56d4800,c5743180,2,c06fd070,ffffffff,...) at ppc_write_ivar+0x42
> ppbus_attach(c5743180,c55fd054,c0cd0dc8,c0beeeb3,80000000,...) at ppbus_attach+0x148

Please try jhb's fix from here:

http://docs.freebsd.org/cgi/mid.cgi?200901221016.58349.jhb