Seen in the dmesg for next-20130325, but looks like it's been doing it since at least next-20130218.
[ 50.162584] dell_wmi: Received unknown WMI event (0x11) [ 51.167629] INFO: trying to register non-static key. [ 51.167636] the code is fine but needs lockdep annotation. [ 51.167639] turning off the locking correctness validator. [ 51.167644] Pid: 594, comm: kworker/0:3 Tainted: G W O 3.9.0-rc4-next-20130325 #67 [ 51.167646] Call Trace: [ 51.167656] [<ffffffff81073847>] register_lock_class+0x108/0x2ba [ 51.167662] [<ffffffff81075113>] __lock_acquire+0x126/0xde2 [ 51.167667] [<ffffffff810755de>] ? __lock_acquire+0x5f1/0xde2 [ 51.167671] [<ffffffff81076111>] lock_acquire+0xc7/0x14a [ 51.167677] [<ffffffff810498dd>] ? process_one_work+0x1fd/0x4ae [ 51.167681] [<ffffffff81049949>] process_one_work+0x269/0x4ae [ 51.167686] [<ffffffff810498dd>] ? process_one_work+0x1fd/0x4ae [ 51.167691] [<ffffffff8104ae2c>] worker_thread+0x2d6/0x3dc [ 51.167696] [<ffffffff8104ab56>] ? rescuer_thread+0x343/0x343 [ 51.167701] [<ffffffff81050394>] kthread+0x9d/0xa5 [ 51.167706] [<ffffffff810502f7>] ? __kthread_parkme+0x60/0x60 [ 51.167712] [<ffffffff815fdf6c>] ret_from_fork+0x7c/0xb0 [ 51.167717] [<ffffffff810502f7>] ? __kthread_parkme+0x60/0x60 'git blame' doesn't seem to shout anything. Commit 112202d90 touched code in that area semi-recently, but I don't actually see a problem with it. (I admit not being sure how long this has been an issue - discovered I had a local config screw-up that meant lockdep wasn't on for quite some time).
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