Description of problem:Every time I shut down my system, when the "cpuspeed" service is stopped it spits an ugly kernel trap message onto the screen before shutdown finishes. The shutdown completes ok though.

Version-Release number of selected component (if applicable):
2.6.33.1

How reproducible:
100%

Steps to Reproduce:
1. Stop the cpuspeed service (yields problem when done manually too)
  
Actual results: Kernel trap message during shutdown


Expected results:No such message


Additional info:

[ INFO: possible recursive locking detected ]
2.6.33-1.fc13.x86_64 #1
---------------------------------------------
cpuspeed/2496 is trying to acquire lock:
 (s_active){++++.+}, at: [<ffffffff81176f02>] sysfs_addrm_finish+0x36/0x55

but task is already holding lock:
 (s_active){++++.+}, at: [<ffffffff811770bd>] sysfs_get_active_two+0x24/0x48

other info that might help us debug this:
4 locks held by cpuspeed/2496:
 #0:  (&buffer->mutex){+.+.+.}, at: [<ffffffff81175b9f>] sysfs_write_file+0x3c/0x144
 #1:  (s_active){++++.+}, at: [<ffffffff811770bd>] sysfs_get_active_two+0x24/0x48
 #2:  (s_active){++++.+}, at: [<ffffffff811770ca>] sysfs_get_active_two+0x31/0x48
 #3:  (dbs_mutex){+.+.+.}, at: [<ffffffffa038bda2>] cpufreq_governor_dbs+0x2a0/0x352 [cpufreq_ondemand]

stack backtrace:
Pid: 2496, comm: cpuspeed Not tainted 2.6.33-1.fc13.x86_64 #1
Call Trace:
 [<ffffffff8107e94f>] __lock_acquire+0xcb5/0xd2c
 [<ffffffff8107cf48>] ? mark_held_locks+0x52/0x70
 [<ffffffff8107d329>] ? debug_check_no_locks_freed+0x12e/0x145
 [<ffffffff8107d1c8>] ? trace_hardirqs_on_caller+0x111/0x135
 [<ffffffff8107eaa2>] lock_acquire+0xdc/0x102
 [<ffffffff81176f02>] ? sysfs_addrm_finish+0x36/0x55
 [<ffffffff8107c300>] ? lockdep_init_map+0x9e/0x113
 [<ffffffff8117690f>] sysfs_deactivate+0x9a/0x103
 [<ffffffff81176f02>] ? sysfs_addrm_finish+0x36/0x55
 [<ffffffff8107120a>] ? sched_clock_cpu+0xc3/0xce
 [<ffffffff81476e44>] ? __mutex_unlock_slowpath+0x120/0x132
 [<ffffffff81176f02>] sysfs_addrm_finish+0x36/0x55
 [<ffffffff81175254>] sysfs_hash_and_remove+0x53/0x6a
 [<ffffffff811782f9>] sysfs_remove_group+0x91/0xca
 [<ffffffffa038bdb6>] cpufreq_governor_dbs+0x2b4/0x352 [cpufreq_ondemand]
 [<ffffffff8107d1f9>] ? trace_hardirqs_on+0xd/0xf
 [<ffffffff813a289b>] __cpufreq_governor+0x9b/0xde
 [<ffffffff813a36e7>] __cpufreq_set_policy+0x1ce/0x275
 [<ffffffff813a3c0b>] store_scaling_governor+0x1a7/0x1fb
 [<ffffffff813a3f14>] ? handle_update+0x0/0x39
 [<ffffffff8147775f>] ? down_write+0x7a/0x81
 [<ffffffff813a34f4>] store+0x61/0x86
 [<ffffffff81175c6b>] sysfs_write_file+0x108/0x144
 [<ffffffff8111ed9d>] vfs_write+0xae/0x10b
 [<ffffffff8107d1c8>] ? trace_hardirqs_on_caller+0x111/0x135
 [<ffffffff8111eeba>] sys_write+0x4a/0x6e
 [<ffffffff81009c72>] system_call_fastpath+0x16/0x1b