[<ffffffff811b9679>] poll_schedule_timeout+0x39/0x60 [<ffffffff811ba633>] do_sys_poll+0x4b3/0x5e0 [<ffffffff811ba951>] sys_poll+0x71/0x100 [<ffffffff81564357>] system_call_fastpath+0x35/0x3a [<ffffffffffffffff>] 0xffffffffffffffff