> [ 27.026441]
> [ 27.026443] =================================
> [ 27.029003] [ INFO: inconsistent lock state ]
> [ 27.030490] 2.6.35-rc5 #1
> [ 27.031984] ---------------------------------
> [ 27.033520] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
> [ 27.035118] swapper/0 [HC0[0]:SC1[1]:HE1:SE0] takes:
> [ 27.035121] (&(&bdi->wb_lock)->rlock){+.?...}, at:
> [<ffffffff8116cffe>] bdi_queue_work+0x2e/0xb0
> [ 27.035133] {SOFTIRQ-ON-W} state was registered at:
> [ 27.035136] [<ffffffff81093fde>] __lock_acquire+0x5de/0x1470
> [ 27.035144] [<ffffffff81094f16>] lock_acquire+0xa6/0x160
> [ 27.035149] [<ffffffff81578ec1>] _raw_spin_lock+0x31/0x40
> [ 27.035157] [<ffffffff811132ce>] bdi_task_init+0x3e/0xa0
> [ 27.035164] [<ffffffff811136c1>] bdi_forker_task+0x31/0x390
> [ 27.035169] [<ffffffff8107dd26>] kthread+0xa6/0xb0
> [ 27.035176] [<ffffffff8100bee4>] kernel_thread_helper+0x4/0x10
> [ 27.035183] irq event stamp: 114300
> [ 27.035185] hardirqs last enabled at (114300):
> [<ffffffff8113aa1d>] kmem_cache_alloc_notrace+0xcd/0x110
> [ 27.035193] hardirqs last disabled at (114299):
> [<ffffffff8113a9a6>] kmem_cache_alloc_notrace+0x56/0x110
> [ 27.035200] softirqs last enabled at (114274):
> [<ffffffff81065a62>] __do_softirq+0x142/0x260
> [ 27.035208] softirqs last disabled at (114287):
> [<ffffffff8100bfdc>] call_softirq+0x1c/0x30
> [ 27.035213]
> [ 27.035214] other info that might help us debug this:
> [ 27.035217] 1 lock held by swapper/0:
> [ 27.035219] #0:
> (&q->backing_dev_info.laptop_mode_wb_timer){+.-...}, at:
> [<ffffffff8106e9f9>] run_timer_softirq+0x139/0x3f0
> [ 27.035229]
> [ 27.035230] stack backtrace:
> [ 27.035234] Pid: 0, comm: swapper Not tainted 2.6.35-rc5 #1
> [ 27.035237] Call Trace:
> [ 27.035239] <IRQ> [<ffffffff810924aa>] print_usage_bug+0x18a/0x190
> [ 27.035250] [<ffffffff81018ccf>] ? save_stack_trace+0x2f/0x50
> [ 27.035255] [<ffffffff81092620>] ? check_usage_forwards+0x0/0xf0
> [ 27.035260] [<ffffffff810932a2>] mark_lock+0x322/0x3f0
> [ 27.035265] [<ffffffff81093f79>] __lock_acquire+0x579/0x1470
> [ 27.035270] [<ffffffff81018ccf>] ? save_stack_trace+0x2f/0x50
> [ 27.035275] [<ffffffff81090037>] ? graph_unlock+0x47/0xa0
> [ 27.035280] [<ffffffff81094f16>] lock_acquire+0xa6/0x160
> [ 27.035284] [<ffffffff8116cffe>] ? bdi_queue_work+0x2e/0xb0
> [ 27.035289] [<ffffffff810933db>] ? mark_held_locks+0x6b/0xa0
> [ 27.035294] [<ffffffff81578ec1>] _raw_spin_lock+0x31/0x40
> [ 27.035298] [<ffffffff8116cffe>] ? bdi_queue_work+0x2e/0xb0
> [ 27.035303] [<ffffffff8109373d>] ? trace_hardirqs_on+0xd/0x10
> [ 27.035307] [<ffffffff8116cffe>] bdi_queue_work+0x2e/0xb0
> [ 27.035313] [<ffffffff8116d508>] __bdi_start_writeback+0x88/0x110
> [ 27.035317] [<ffffffff8116d5d5>] bdi_start_writeback+0x15/0x20
> [ 27.035324] [<ffffffff8110345b>] laptop_mode_timer_fn+0x5b/0x70
> [ 27.035329] [<ffffffff8106ea7f>] run_timer_softirq+0x1bf/0x3f0
> [ 27.035334] [<ffffffff8106e9f9>] ? run_timer_softirq+0x139/0x3f0
> [ 27.035339] [<ffffffff81082516>] ? __run_hrtimer+0xa6/0x1b0
> [ 27.035343] [<ffffffff81103400>] ? laptop_mode_timer_fn+0x0/0x70
> [ 27.035349] [<ffffffff81065999>] ? __do_softirq+0x79/0x260
> [ 27.035354] [<ffffffff810659f2>] __do_softirq+0xd2/0x260
> [ 27.035359] [<ffffffff81082920>] ? hrtimer_interrupt+0x140/0x250
> [ 27.035363] [<ffffffff8100bfdc>] call_softirq+0x1c/0x30
> [ 27.035368] [<ffffffff8100daad>] do_softirq+0x9d/0xd0
> [ 27.035373] [<ffffffff810655b5>] irq_exit+0x95/0xa0
> [ 27.035378] [<ffffffff81580f30>] smp_apic_timer_interrupt+0x70/0x9b
> [ 27.035386] [<ffffffff8100ba93>] apic_timer_interrupt+0x13/0x20
> [ 27.035389] <EOI> [<ffffffff812fdb8a>] ? intel_idle+0xfa/0x180
> [ 27.035399] [<ffffffff812fdb83>] ? intel_idle+0xf3/0x180
> [ 27.035406] [<ffffffff8157d6a0>] ? __atomic_notifier_call_chain+0x0/0xa0
> [ 27.035412] [<ffffffff81459a87>] cpuidle_idle_call+0xa7/0x140
> [ 27.035418] [<ffffffff81009dd8>] cpu_idle+0xb8/0x110
> [ 27.035424] [<ffffffff8157276b>] start_secondary+0x1fd/0x204
> --
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