[ 2473.938051] =================================
[ 2473.944150] [ INFO: inconsistent lock state ]
[ 2473.948639] [ 2.6.23.1-rt5 #16
[ 2473.951833] ---------------------------------
[ 2473.956302] inconsistent {in-hardirq-W} -> {hardirq-on-W} usage.
[ 2473.962614] swapper/0 [HC0[0]:SC0[0]:HE0:SE1] takes:
[ 2473.967773]  (tick_broadcast_lock){+...}, at: [<ffffffff81050ac3>] tick_broadcast_oneshot_control+0x19/0xea
[ 2473.978047] {in-hardirq-W} state was registered at:
[ 2473.983144]   [<ffffffffffffffff>] 0xffffffffffffffff
[ 2473.988455] irq event stamp: 31417205
[ 2473.992244] hardirqs last  enabled at (31417203): [<ffffffff81227ae6>] trace_hardirqs_on_thunk+0x3a/0x3c
[ 2474.002002] hardirqs last disabled at (31417205): [<ffffffff8100ab60>] cpu_idle+0x8f/0xe3
[ 2474.010498] softirqs last  enabled at (0): [<ffffffff81033d64>] copy_process+0x659/0x1826
[ 2474.019017] softirqs last disabled at (0): [<0000000000000000>] 0x0
[ 2474.025549] 
[ 2474.025549] other info that might help us debug this:
[ 2474.032399] 1 lock held by swapper/0:
[ 2474.036208]  #0:  (tick_broadcast_lock){+...}, at: [<ffffffff81050ac3>] tick_broadcast_oneshot_control+0x19/0xea
[ 2474.046917] 
[ 2474.046917] stack backtrace:
[ 2474.051491] 
[ 2474.051491] Call Trace:
[ 2474.055596] 
[ 2474.057152] INFO: lockdep is turned off.
[ 2474.061205] ---------------------------
[ 2474.065198] | preempt count: 00000001 ]
[ 2474.069183] | 1-level deep critical section nesting:
[ 2474.074329] ----------------------------------------
[ 2474.079433] .. [<ffffffff8100abac>] .... cpu_idle+0xdb/0xe3
[ 2474.085223] .....[<00000000>] ..   ( <= 0x0)
[ 2474.089759]