fatal trap 12 during boot, sys/dev/pci/pci.c

I upgrade my world to latest current yesterday.
And it panic on my notebook during boot, around pci messages.

I use GENERIC config for this testing.
And I unset acpi_load, otherwise it will hang during boot.

Here is the panic message.
<cut>
Pentium Pro MTRR support enabled
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcibios: BIOS version 2.10
Using $PIR table, 6 entries at 0xc00fe840
pcib0: <Intel 82443MX host to PCI bridge> at pcibus 0 on motherboard
pci0: <PCI bus> on pcib0


Fatal trap 12: page fault while in kernel mode
fault virtual address     = 0xeb813
fault code                = supervisor read, page not present
instruction pointer       = 0x8:0xc00eb714
stack pointer             = 0x10:0xc06fda3c
frame pointer             = 0x10:0xc06fda3c
code segment              = base 0x0, limit 0xfffff, type 0x1b
                          = DPL 0, pres 1, def32 1, gran 1
processor eflags          = interrupt enabled, resume, IOPL = 0
current process           = 0 (swapper)
kernel: type 12 trap, code=0
Stopped at      0xc00eb714:       cmpb    %cs:0x1(%esi),%bl
db> tr
kernbase(c0d31580,c04a499d,c06fdad4,50d,38) at 0xc00eb714
_end(cb9d08c4,c4f6ec8b,81067540,ffffe5,e67f2400) at 0xc06fdaa8
db>
</cut>

After binary search, I found the difference between panic or not
is reversion 1.215 and 1.216 of sys/dev/pci/pci.c.

Kernel panic all from 1.216 to 1.221 of pci.c.

If you want to have more information, please let me know.