root@p3041ds:~# insmod /media/mmcblk0p1/fsl_pq_mdio.ko
libphy: Freescale PowerQUICC MII Bus: probed
libphy: mdio_mux: probed
Machine check in kernel mode.
Caused by (from MCSR=a000): Load Error Report
Guarded Load Error Report
---[ end trace 1e68ecaf7cc745a8 ]---

Unable to handle kernel paging request for data at address 0xffffffec
Faulting instruction address: 0xc00566d4
Oops: Kernel access of bad area, sig: 11 [#1]
SMP NR_CPUS=4 P3041 DS
Modules linked in: fsl_pq_mdio
NIP: c00566d4 LR: c004cf28 CTR: c006eff0
REGS: ee695ca8 TRAP: 0300   Tainted: G      D       (3.8.13-rt9-DEBUG-WP6-04559-ge12782e-dirty)
MSR: 00000002 <>  CR: 44004022  XER: 20000000
DEAR: ffffffec, ESR: 00000000
TASK = ea0dd570[29] 'kworker/u:1' THREAD: ea116000 CPU: 1
GPR00: c052be78 ee695d58 ea0dd570 ea0dd570 00000001 00000001 00000000 00000000
GPR08: 00000001 00000000 00000001 00000000 24004082 00000000 c0056240 008e6000
GPR16: ea0dd6f4 c0540000 c0770000 c07a0000 c0760000 c0768cc0 c0540000 00000000
GPR24: c0724480 00000004 c0724480 c07691c8 ee694000 00000001 ea0dd570 00000001
NIP [c00566d4] kthread_data+0x4/0x10
LR [c004cf28] wq_worker_sleeping+0x18/0x110
Call Trace:
Instruction dump:
409effdc 80010024 7fc3f378 bb410008 38210020 7c0803a6 4e800020 81220158
8069ffe4 5463f7fe 4e800020 81230158 <8069ffec> 4e800020 60000000 80620158
---[ end trace 1e68ecaf7cc745a9 ]---

Fixing recursive fault but reboot is needed!
BUG: soft lockup - CPU#2 stuck for 22s! [sh:1629]
Modules linked in: fsl_pq_mdio
NIP: c0088384 LR: c00883a8 CTR: c000fcb0
REGS: ea50bcc8 TRAP: 0901   Tainted: G      D       (3.8.13-rt9-DEBUG-WP6-04559-ge12782e-dirty)
MSR: 00029002 <CE,EE,ME>  CR: 42008424  XER: 00000000
TASK = ea139570[1629] 'sh' THREAD: ea50a000 CPU: 2
GPR00: 00000001 ea50bd78 ea139570 00000001 00000001 00000001 00000001 000003f4
GPR08: 00000001 00000001 c0720000 c100a400 22004422
NIP [c0088384] generic_exec_single+0x84/0xb0
LR [c00883a8] generic_exec_single+0xa8/0xb0
Call Trace:
[ea50bd78] [c00883a8] generic_exec_single+0xa8/0xb0 (unreliable)
[ea50bda0] [c008849c] smp_call_function_single+0xec/0x1c0
[ea50bdd0] [c00195b8] __flush_tlb_page+0xa8/0xf0
[ea50bdf0] [c00185c4] ptep_set_access_flags+0x74/0x90
[ea50be08] [c00f65c0] do_wp_page+0x350/0x810
[ea50be50] [c0017798] do_page_fault+0x1d8/0x530
[ea50bf40] [c001063c] handle_page_fault+0xc/0x80
--- Exception: 301 at 0x100c3320
    LR = 0x1003b734
Instruction dump:
93fe0004 7f83e378 93df0000 913f0004 93e90000 484a5099 7f9ee800 419e0030
2f990000 40be0008 48000010 a01f0010 <70090001> 4082fff8 8001002c bb21000c
BUG: soft lockup - CPU#2 stuck for 22s! [sh:1629]
BUG: soft lockup - CPU#3 stuck for 22s! [udevd:679]
Modules linked in: fsl_pq_mdio
NIP: c00887c8 LR: c00887a0 CTR: c000fcb0
REGS: ea549ce8 TRAP: 0901   Tainted: G      D       (3.8.13-rt9-DEBUG-WP6-04559-ge12782e-dirty)
MSR: 00029002 <CE,EE,ME>  CR: 42028424  XER: 20000000
TASK = ea1b5070[679] 'udevd' THREAD: ea548000 CPU: 3
GPR00: 00000001 ea549d98 ea1b5070 00000004 00000000 00000000 00000001 000003f4
GPR08: ffffffff 00000001 00000000 00000001 22024422
NIP [c00887c8] smp_call_function_many+0x258/0x310
LR [c00887a0] smp_call_function_many+0x230/0x310
Call Trace:
[ea549d98] [c00887a0] smp_call_function_many+0x230/0x310 (unreliable)
[ea549dd0] [c00195b8] __flush_tlb_page+0xa8/0xf0
[ea549df0] [c00185c4] ptep_set_access_flags+0x74/0x90
[ea549e08] [c00f65c0] do_wp_page+0x350/0x810
[ea549e50] [c0017798] do_page_fault+0x1d8/0x530
[ea549f40] [c001063c] handle_page_fault+0xc/0x80
--- Exception: 301 at 0xfed6370
    LR = 0xffb1098
Instruction dump:
387e001c 4bf88dc5 2f940000 41befe54 a01e0010 70090001 41a2fe48 60000000
60000000 60000000 a01e0010 700b0001 <4082fff8> 8001003c ba810008 38210038
Modules linked in: fsl_pq_mdio
NIP: c0088388 LR: c00883a8 CTR: c000fcb0
REGS: ea50bcc8 TRAP: 0901   Tainted: G      D       (3.8.13-rt9-DEBUG-WP6-04559-ge12782e-dirty)
MSR: 00029002 <CE,EE,ME>  CR: 42008424  XER: 00000000
TASK = ea139570[1629] 'sh' THREAD: ea50a000 CPU: 2
GPR00: 00000001 ea50bd78 ea139570 00000001 00000001 00000001 00000001 000003f4
GPR08: 00000001 00000001 c0720000 c100a400 22004422
NIP [c0088388] generic_exec_single+0x88/0xb0
LR [c00883a8] generic_exec_single+0xa8/0xb0
Call Trace:
[ea50bd78] [c00883a8] generic_exec_single+0xa8/0xb0 (unreliable)
[ea50bda0] [c008849c] smp_call_function_single+0xec/0x1c0
[ea50bdd0] [c00195b8] __flush_tlb_page+0xa8/0xf0
[ea50bdf0] [c00185c4] ptep_set_access_flags+0x74/0x90
[ea50be08] [c00f65c0] do_wp_page+0x350/0x810
[ea50be50] [c0017798] do_page_fault+0x1d8/0x530
[ea50bf40] [c001063c] handle_page_fault+0xc/0x80
--- Exception: 301 at 0x100c3320
    LR = 0x1003b734
Instruction dump:
7f83e378 93df0000 913f0004 93e90000 484a5099 7f9ee800 419e0030 2f990000
40be0008 48000010 a01f0010 70090001 <4082fff8> 8001002c bb21000c 38210028