gpio_acpi0: detached.
aei_race: gpio_acpi detach returned 0 (info memset+kfree done).
aei_race: releasing blocker -> handle_event on freed info.
aei_race: blocker released; queued AEI event now runs on the freed info.
.
.
Fatal trap 12: page fault while in kernel mode.
cpuid = 0; lapic id = 0.
fault virtual address.= 0x28.
fault code..= supervisor read data, page not present.
instruction pointer.= 0x8:0xffffffff8068e970.
stack pointer.        = 0x10:0xfffff8008dd23a28.
frame pointer.        = 0x10:0xfffff8008dd23a90.
code segment..= base 0x0, limit 0xfffff, type 0x1b.
...= DPL 0, pres 1, long 1, def32 0, gran 1.
processor eflags.= interrupt enabled, resume, IOPL = 0.
current process..= Idle.
current thread          = pri 12 .
trap number..= 12.
panic: page fault.
cpuid = 0.
Trace beginning at frame 0xfffff8008dd23818.
trap_fatal() at trap_fatal+0x301 0xffffffff80bd68b1 .
trap_fatal() at trap_fatal+0x301 0xffffffff80bd68b1 .
trap_pfault() at trap_pfault+0x475 0xffffffff80bd6ed5 .
trap() at trap+0x17c 0xffffffff80bd73fc .
calltrap() at calltrap+0x9 0xffffffff80b9aa2a .
--- trap 000000000000000c, rip = ffffffff8068e970, rsp = fffff8008dd23a10, rbp = fffff8008dd23a90 ---.
device_get_parent() at device_get_parent 0xffffffff8068e970 .