AR7 unaligned access

OpenWRT revision 7730 on TI AR7 (TNETD7300AGDW) (kernel version 2.6.21.5)
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Please press Enter to activate this console. Unhandled kernel unaligned access[#1]:
Cpu 0
$ 0   : 00000000 10008400 00000000 94001b10
$ 4   : 940030a0 0a0a0a0a 22222222 00000000
$ 8   : 940def58 9400823c 940dedf8 940dee24
$12   : 940dee50 943a0000 943a0000 940dee7c
$16   : 94001b00 00000000 940030a0 22222222
$20   : 00000000 00000000 00000000 00000000
$24   : 00000000 9410b840
$28   : 943e2000 943e3ec0 00000000 94174808
Hi    : 00000004
Lo    : 22222222
epc   : 94172c88 drain_freelist+0x6c/0xf8     Not tainted
ra    : 94174808 cache_reap+0xc0/0x124
Status: 10008402    KERNEL EXL
Cause : 10800010
BadVA : 0a0a0a0a
PrId  : 00018448
Modules linked in:
Process events/0 (pid: 3, threadinfo=943e2000, task=940193f8)
Stack : 00800010 94172b3c 04008004 00000802 94001b00 940030a0 943a2f60 9401bed0
        94174808 941747c8 00000000 9411dd40 1768ca00 943058cc 00000000 9411cdc0
        10008401 9400bb80 94174748 941362ac 9400bb80 9401bed0 00000000 00000000
        9400bb88 9400bb90 9400bb80 94136d04 9401bedc 9401bedc 00000000 9411c47c
        ffffffff ffffffff ffffffff ffffffff 00000000 940193f8 9411db50 00100100
        ...
Call Trace:
[<94172c88>] drain_freelist+0x6c/0xf8
[<94174808>] cache_reap+0xc0/0x124
[<941362ac>] run_workqueue+0x160/0x248
[<94136d04>] worker_thread+0x118/0x160
[<9413b434>] kthread+0x1b8/0x224
[<941054b4>] kernel_thread_helper+0x10/0x18


Code: 40816000  0905cb3e  02201021 <8ca30000> 8ca40004  3c020010  34420100  ac830000  aca20000