http://docs.openmoko.org/trac/ticket//2238

[  557.930000] Bad mode in data abort handler detected
[  557.930000] Internal error: Oops - bad mode: 0 [#1] PREEMPT
[  557.930000] Modules linked in: s3c2410_wdt
[  557.930000] CPU: 0    Not tainted  (2.6.29lindi_c1b03e4da22e8dd7-mokodev #2)
[  557.930000] PC is at rb_reserve_next_event+0x18/0x418
[  557.930000] LR is at 0x1
[  557.930000] pc : [<c0094ea8>]    lr : [<00000001>]    psr: 800000d1
[  557.930000] sp : c799de58  ip : 00590000  fp : c799deb4
[  557.930000] r10: 00000014  r9 : 00000001  r8 : 00000015
[  557.930000] r7 : c003ed24  r6 : c0a016f0  r5 : c78103a0  r4 : 00000000
[  557.930000] r3 : 0000001b  r2 : 00000018  r1 : 00000003  r0 : c78103a0
[  557.930000] Flags: Nzcv  IRQs off  FIQs off  Mode FIQ_32  ISA ARM  Segment kernel
[  557.930000] Control: c000717f  Table: 37290000  DAC: 00000017
[  557.930000] Process events/0 (pid: 5, stack limit = 0xc799c268)
[  557.930000] Stack: (0xc799de58 to 0xc799e000)
[  557.930000] de40:                                                       c78103a0 00000003
[  557.930000] de60: 00000018 0000001b 00000000 c78103a0 c0a016f0 c003ed24 00000015 00000001
[  557.930000] de80: 00000014 c799deb4 00590000 c799de58 00000001 c0094ea8 800000d1 ffffffff
[  557.930000] dea0: 00000001 c0a330e8 c799decc c799deb8 c0290270 c0043ecc c7b6254c 00000002
[  557.930000] dec0: c799def4 c799ded0 c028f468 c0290224 c7b6254c c7810320 c7b62400 c7b62548
[  557.930000] dee0: 00000000 c799df54 c799df34 c799def8 c028f9f4 c028f448 c799df34 c799df08
[  557.930000] df00: c007e9d0 c007e178 00000001 00000000 00000000 c006da38 c7b6254c c7810320
[  557.930000] df20: c799c000 c7b62548 c799df94 c799df38 c006dab0 c028f9c8 00000001 00000000
[  557.930000] df40: c006da38 c799df60 c7810344 c028f9b8 c7810320 c0a330e0 00000000 c0498f9a
[  557.930000] df60: 00000000 00000000 c799df74 c781034c c799c000 c7810320 c7810344 c799df9c
[  557.930000] df80: 00000000 00000000 c799dfd4 c799df98 c006dfc0 c006d988 c03af418 00000000
[  557.930000] dfa0: c799a0a0 c0072514 c799dfa8 c799dfa8 c7810320 c799c000 c7810320 c006debc
[  557.930000] dfc0: 00000000 00000000 c799dff4 c799dfd8 c00721b4 c006decc 00000000 00000000
[  557.930000] dfe0: 00000000 00000000 00000000 c799dff8 c005f7e4 c0072160 ffffffff ffffffff
[  557.930000] Backtrace:
[  557.930000] [<c0043ebc>] (gta02_fiq_kick+0x0/0x98) from [<c0290270>] (hdq_read+0x5c/0xc4)
[  557.930000]  r4:c0a330e8
[  557.930000] [<c0290214>] (hdq_read+0x0/0xc4) from [<c028f468>] (hdq_read16+0x30/0x88)
[  557.930000]  r5:00000002 r4:c7b6254c
[  557.930000] [<c028f438>] (hdq_read16+0x0/0x88) from [<c028f9f4>] (bq27000_battery_work+0x3c/0x13c)
[  557.930000] [<c028f9b8>] (bq27000_battery_work+0x0/0x13c) from [<c006dab0>] (run_workqueue+0x138/0x234)
[  557.930000]  r7:c7b62548 r6:c799c000 r5:c7810320 r4:c7b6254c
[  557.930000] [<c006d978>] (run_workqueue+0x0/0x234) from [<c006dfc0>] (worker_thread+0x104/0x118)
[  557.930000] [<c006debc>] (worker_thread+0x0/0x118) from [<c00721b4>] (kthread+0x64/0x98)
[  557.930000]  r8:00000000 r7:00000000 r6:c006debc r5:c7810320 r4:c799c000
[  557.930000] [<c0072150>] (kthread+0x0/0x98) from [<c005f7e4>] (do_exit+0x0/0x2c8)
[  557.930000]  r6:00000000 r5:00000000 r4:00000000
[  557.930000] Code: e24cb004 e24dd034 e3a0a000 e1a05000 (e50b1044)
[  557.930000] Bad mode in data abort handler detected
 [  557.930000] BUG: spinlock lockup on CPU#0, events/0/5, c04cf4a0
[  557.930000] [<c03ae9c8>] (dump_stack+0x0/0x18) from [<c01b2a64>] (_raw_spin_lock+0x114/0x150)
[  557.930000] [<c01b2950>] (_raw_spin_lock+0x0/0x150) from [<c03b1d20>] (_spin_lock_irq+0x7c/0x90)
[  557.930000] [<c03b1ca4>] (_spin_lock_irq+0x0/0x90) from [<c003e754>] (die+0x3c/0xcc)
[  557.930000]  r7:c799ddd8 r6:c045cc36 r5:00000000 r4:c799ddd8
[  557.930000] [<c003e718>] (die+0x0/0xcc) from [<c003e830>] (bad_mode+0x4c/0x5c)
[  557.930000] [<c003e7e4>] (bad_mode+0x0/0x5c) from [<c005bb9c>] (add_taint+0x24/0x30)
[  557.930000]  r4:00000007
: [21474541.560000] ramconsole: old data ends here

bad_mode(regs, r1=reason=BAD_DATA=1)
common_invalid
(we hit data abort in FIQ_32 mode)
(rb_reserve_next_event is trying to write to r1 but r1 is 3?)

c0a016f0 l     O .bss   00000020 global_trace
__actual_isr
rb_reserve_next_event: c0094ea8:       e50b1044        str     r1, [fp, #-68]
hdq_read: c0290270:       e3a04005        mov     r4, #5  ; 0x5
gta02_fiq_kick: c0043ecc:       ebffd82e        bl      c0039f8c <mcount>

=== c78103a0
??
??:0
=== 00000003
??
??:0
=== 00000018
??
??:0
=== 0000001b
??
??:0
=== 00000000
??
??:0
=== c78103a0
??
??:0
=== c0a016f0
__bss_start
klist.c:0
=== c003ed24
__actual_isr
/local/lindi/neolinux/arch/arm/kernel/fiq.c:184
=== 00000015
??
??:0
=== 00000001
??
??:0
=== 00000014
??
??:0
=== c799deb4
??
??:0
=== 00590000
??
??:0
=== c799de58
??
??:0
=== 00000001
??
??:0
=== c0094ea8
rb_reserve_next_event
/local/lindi/neolinux/kernel/trace/ring_buffer.c:1176
=== 800000d1
??
??:0
=== ffffffff
??
??:0
=== 00000001
??
??:0
=== c0a330e8
__bss_start
klist.c:0
=== c799decc
??
??:0
=== c799deb8
??
??:0
=== c0290270
hdq_read
/local/lindi/neolinux/drivers/power/hdq.c:257
=== c0043ecc
gta02_fiq_kick
/local/lindi/neolinux/arch/arm/mach-s3c2442/mach-gta02.c:179
=== c7b6254c
??
??:0
=== 00000002
??
??:0
=== c799def4
??
??:0
=== c799ded0
??
??:0
=== c028f468
hdq_read16
/local/lindi/neolinux/drivers/power/bq27000_battery.c:157
=== c0290224
hdq_read
/local/lindi/neolinux/drivers/power/hdq.c:249
=== c7b6254c
??
??:0
=== c7810320
??
??:0
=== c7b62400
??
??:0
=== c7b62548
??
??:0
=== 00000000
??
??:0
=== c799df54
??
??:0
=== c799df34
??
??:0
=== c799def8
??
??:0
=== c028f9f4
bq27000_battery_work
/local/lindi/neolinux/drivers/power/bq27000_battery.c:320
=== c028f448
hdq_read16
/local/lindi/neolinux/drivers/power/bq27000_battery.c:148
=== c799df34
??
??:0
=== c799df08
??
??:0
=== c007e9d0
lock_acquire
/local/lindi/neolinux/kernel/lockdep.c:2947
=== c007e178
__lock_acquire
/local/lindi/neolinux/kernel/lockdep.c:2535
=== 00000001
??
??:0
=== 00000000
??
??:0
=== 00000000
??
??:0
=== c006da38
____atomic_clear_bit
/local/lindi/neolinux/arch/arm/include/asm/bitops.h:56
=== c7b6254c
??
??:0
=== c7810320
??
??:0
=== c799c000
??
??:0
=== c7b62548
??
??:0
=== c799df94
??
??:0
=== c799df38
??
??:0
=== c006dab0
run_workqueue
/local/lindi/neolinux/kernel/workqueue.c:297
=== c028f9c8
bq27000_battery_work
/local/lindi/neolinux/drivers/power/bq27000_battery.c:313
=== 00000001
??
??:0
=== 00000000
??
??:0
=== c006da38
____atomic_clear_bit
/local/lindi/neolinux/arch/arm/include/asm/bitops.h:56
=== c799df60
??
??:0
=== c7810344
??
??:0
=== c028f9b8
bq27000_battery_work
/local/lindi/neolinux/drivers/power/bq27000_battery.c:313
=== c7810320
??
??:0
=== c0a330e0
__bss_start
klist.c:0
=== 00000000
??
??:0
=== c0498f9a
kallsyms_token_index
klist.c:0
=== 00000000
??
??:0
=== 00000000
??
??:0
=== c799df74
??
??:0
=== c781034c
??
??:0
=== c799c000
??
??:0
=== c7810320
??
??:0
=== c7810344
??
??:0
=== c799df9c
??
??:0
=== 00000000
??
??:0
=== 00000000
??
??:0
=== c799dfd4
??
??:0
=== c799df98
??
??:0
=== c006dfc0
worker_thread
/local/lindi/neolinux/kernel/workqueue.c:341
=== c006d988
run_workqueue
/local/lindi/neolinux/kernel/workqueue.c:263
=== c03af418
test_bit
/local/lindi/neolinux/include/asm-generic/bitops/non-atomic.h:105
=== 00000000
??
??:0
=== c799a0a0
??
??:0
=== c0072514
autoremove_wake_function
/local/lindi/neolinux/kernel/wait.c:121
=== c799dfa8
??
??:0
=== c799dfa8
??
??:0
=== c7810320
??
??:0
=== c799c000
??
??:0
=== c7810320
??
??:0
=== c006debc
worker_thread
/local/lindi/neolinux/kernel/workqueue.c:319
=== 00000000
??
??:0
=== 00000000
??
??:0
=== c799dff4
??
??:0
=== c799dfd8
??
??:0
=== c00721b4
kthread
/local/lindi/neolinux/kernel/kthread.c:83
=== c006decc
worker_thread
/local/lindi/neolinux/kernel/workqueue.c:319
=== 00000000
??
??:0
=== 00000000
??
??:0
=== 00000000
??
??:0
=== 00000000
??
??:0
=== 00000000
??
??:0
=== c799dff8
??
??:0
=== c005f7e4
do_exit
/local/lindi/neolinux/kernel/exit.c:1004
=== c0072160
kthread
/local/lindi/neolinux/kernel/kthread.c:67
=== ffffffff
??
??:0
=== ffffffff
??
??:0