Kernel panic when loading snd_ai2s module

[Super Biscuit]

--- On Fri, 4/30/10, Justin Hibbits <jrh29 at alumni.cwru.edu> wrote:

From: Justin Hibbits <jrh29 at alumni.cwru.edu>
Subject: Kernel panic when loading snd_ai2s module
To: "FreeBSD PowerPC ML" <freebsd-ppc at freebsd.org>
Date: Friday, April 30, 2010, 2:07 AM

lock order reversal:
1st 0xd47cc118 bufwait (bufwait) @ /usr/src/sys/kern/vfs_bio.c:2559
2nd 0x177c200 dirhash (dirhash) @ /usr/src/sys/ufs/ufs/ufs_dirhash.c:285
KDB: stack backtrace:
0xdafa9760: at kdb_backtrace+0x4c
0xdafa9870: at_witness_debugger+0x3c
0xdafa97a0:at witness_checkorder+0x8d0
0xdafa9800: at _sx_xcloxk+0x90
0xdafa9830: at ufsdirhash_acquire+0x40
0xdafa9850: at ufsdirhash_remove+0x2c
0xdafa98c0: at ufs_remove+0x8c
0xdafa9900: at VOP_REMOVE_APV+0xe0
0xdafa9920: at kern_unlinkat+0x22c
0xdafa9a60: at kern_unlink+0x28
0xdafa9a80: at unlink+0x1c
0xdafa9aa0: at trap+0x37c
0xdafa9b60: at powerpc_interrupt+0x100
0xdafa9b90: user SC trap by 0x41957238:srr1=0xd032
            r1=0x7fffc4e0 cr=0x20000042 xer=0 ctr=0x41957230

I'm not able to run kgdb on it.