kernel panic out of nowhere on my laptop

[dawntodon]

I got the following error and I wish I could more information, but it doesn't appear all that obvious as to what caused it:

 

panic(cpu 1 caller 0x2269f0): "thread_invoke: preemption_level -1, possible cause: unlocking an unlocked mutex or spinlock"@/SourceCache/xnu/xnu-1504.7.4/osfmk/kern/sched_prim.c:1476
Debugger called: <panic>
Backtrace (CPU 1), Frame: Return Address (4 potential args on stack)
0x2f94be18 : 0x21b455 (0x5cf328 0x2f94be4c 0x2238b1 0x0)
0x2f94be68 : 0x2269f0 (0x58712x 0xffffffff 0x5870c4 0x2262b4)
0x2f94bee8 : 0x2270f6 (0x67ed3f0 0x0 0x52ae600 0x1)
0x2f94bf58 : 0x227161 (0x22fa9b 0x863ea0 0x0 0x2a1591)
0x2f94bf78 : 0x22fc35 (0x22fa9b 0x863ea0 0x0 0x0)
0x2f94bfc8 : 0x29e6cc (0x863ea0 0x0 0x10 0x525d360)

 

Please let me know what more information is needed and I'll respond quickly. Thanks.

 

This is on a HP Compaq NC4400/2.0 GHz T7200 Core 2 Duo/2 GB DDR2 667MHz RAM/Monoprice Realtek RTL8188SU Wireless-N adapter.

 

My DSDT file is here.