------------[ cut here ]------------
WARNING: at /build/buildd/linux-2.6.35/arch/x86/include/asm/processor.h:1005 read_measured_perf_ctrs+0x6c/0x80()
Hardware name: System Product Name
Modules linked in: binfmt_misc vboxnetadp vboxnetflt vboxdrv snd_hda_codec_atihdmi snd_hda_codec_via snd_hda_intel snd_hda_codec snd_hwdep snd_pcm radeon snd_seq_midi snd_rawmidi snd_seq_midi_event ttm snd_seq drm_kms_helper ppdev snd_timer snd_seq_device parport_pc asus_atk0110 psmouse serio_raw drm intel_agp snd led_class agpgart i2c_algo_bit soundcore snd_page_alloc lp parport usbhid hid atl1e
Pid: 79, comm: kondemand/0 Not tainted 2.6.35-21-generic-pae #31-Ubuntu
Call Trace:
 [<c01527b2>] warn_slowpath_common+0x72/0xa0
 [<c012191c>] ? read_measured_perf_ctrs+0x6c/0x80
 [<c012191c>] ? read_measured_perf_ctrs+0x6c/0x80
 [<c01218b0>] ? read_measured_perf_ctrs+0x0/0x80
 [<c0152802>] warn_slowpath_null+0x22/0x30
 [<c012191c>] read_measured_perf_ctrs+0x6c/0x80
 [<c01218b0>] ? read_measured_perf_ctrs+0x0/0x80
 [<c0183632>] smp_call_function_single+0x72/0x130
 [<c012180f>] cpufreq_get_measured_perf+0x2f/0xd0
 [<c04f2b4e>] ? cpufreq_cpu_get+0x8e/0xf0
 [<c017e4aa>] ? get_cpu_iowait_time_us+0x6a/0xa0
 [<c04f2d8a>] __cpufreq_driver_getavg+0x6a/0x70
 [<c04f5a55>] dbs_check_cpu+0x75/0x2e0
 [<c014ca99>] ? dequeue_task_fair+0x79/0x80
 [<c04f5d67>] do_dbs_timer+0xa7/0xc0
 [<c05ed4da>] ? schedule+0x37a/0x7a0
 [<c0169d3e>] run_workqueue+0x8e/0x150
 [<c04f5cc0>] ? do_dbs_timer+0x0/0xc0
 [<c0169e84>] worker_thread+0x84/0xe0
 [<c016e100>] ? autoremove_wake_function+0x0/0x50
 [<c0169e00>] ? worker_thread+0x0/0xe0
 [<c016dcd4>] kthread+0x74/0x80
 [<c016dc60>] ? kthread+0x0/0x80
 [<c010993e>] kernel_thread_helper+0x6/0x10
---[ end trace 4af402baefc5a527 ]---