"sleeping without a mutex" panic with FixitCD from today's SNAP

[Cordula's Web]

> Trying to boot freshly compiled (via current-on-stable vay, mostly described in
> http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&c2coff=1&selm=20040319034905.GA975%40doom.homeunix.org)
> -current LiveFS CD on three different machines (all i686-like, from AMD Duron
> 600 on VIA KT133 to AthlonXP 2k+ on nVidia nForce2; all with ATACI CD/DVD) I
> got 100% reproducible ddb panic after mounting CD with "Fixit" menu item:
> 
> panic: sleeping without a mutex
> at line 144 in file /usr/src/sys/kern/kern_synch.c

Same here, while trying to upgrade from 5.2.1-RELEASE to yesterday's
and today's -CURRENT. It happens here:

# make installkernel KERNCONF=GENERIC
# reboot   (in single user mode)
# mount -a 
# mergemaster -p
# make installworld
<panic: sleeping without a mutex
at line 144 in file /usr/src/sys/kern/kern_synch.c>

The panic is 100% reproducible.

My work around was to boot kernel.old, then 'make installworld' etc.,
and then reboot (with new kernel). Seems to work so far...

> Googling does not help me much. Any clues? Did someone broke ATAPI CD?
> 
> Thanks in advance; please keep me CCd as I don't read -current.
> 
> Sincerely,
> D.Marck                                     [DM5020, MCK-RIPE, DM3-RIPN]
> ------------------------------------------------------------------------
> *** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck at rinet.ru ***
> ------------------------------------------------------------------------
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