I don't recall seeing this one until now..
Dave
[ 3.559609] WARNING: CPU: 0 PID: 181 at kernel/sched/core.c:7326
__might_sleep+0xd0/0xf0()
[ 3.559701] do not call blocking ops when !TASK_RUNNING; state=1 set at
[<ffffffff950e1db3>] prepare_to_wait_event+0x93/0x1f0
[ 3.559800] CPU: 0 PID: 181 Comm: modprobe Not tainted 3.19.0+ #5
[ 3.559932] ffffffff950b75b0 ffff88020da3fba8 ffffffff9573726a
ffffffff95101ec3
[ 3.560174] ffff88020da3fbf8 ffff88020da3fbe8 ffffffff950742f2
ffffffff964c1fa0
[ 3.561927] ffffffff95ad86e8 000000000000026d 0000000000000000
ffff88020da9aac0
[ 3.562159] Call Trace:
[ 3.562218] [<ffffffff950b75b0>] ? __might_sleep+0xd0/0xf0
[ 3.562288] [<ffffffff9573726a>] dump_stack+0x84/0xb9
[ 3.562359] [<ffffffff95101ec3>] ? console_unlock+0x373/0x690
[ 3.562431] [<ffffffff950742f2>] warn_slowpath_common+0xd2/0x140
[ 3.562495] [<ffffffff95074457>] warn_slowpath_fmt+0x57/0x70
[ 3.562569] [<ffffffff950e1db3>] ? prepare_to_wait_event+0x93/0x1f0
[ 3.562641] [<ffffffff950e1db3>] ? prepare_to_wait_event+0x93/0x1f0
[ 3.562728] [<ffffffff950b75b0>] __might_sleep+0xd0/0xf0
[ 3.562799] [<ffffffff9573b9c1>] mutex_lock_nested+0x41/0x760
[ 3.562870] [<ffffffff950cb16d>] ? local_clock+0x4d/0x60
[ 3.562933] [<ffffffff957439ef>] ? _raw_spin_unlock_irqrestore+0x5f/0xc0
[ 3.563009] [<ffffffff9514e888>] resolve_symbol.isra.35+0x48/0x150
[ 3.563081] [<ffffffff951521b4>] load_module+0x1134/0x20b0
[ 3.563149] [<ffffffff953ed85e>] ? trace_hardirqs_on_thunk+0x3a/0x3f
[ 3.563221] [<ffffffff950e1570>] ? wait_woken+0x110/0x110
[ 3.563290] [<ffffffff95744ba0>] ? retint_restore_args+0xe/0xe
[ 3.563359] [<ffffffff95153262>] SyS_init_module+0x132/0x190
[ 3.563433] [<ffffffff95743f52>] system_call_fastpath+0x12/0x17
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