Thanks Yokota-san for tracking down the problem.

> As reported in this list by several people, you may be seeing that
> your PS/2 mouse is not detected after the recent ACPI update.
> This seems to be caused by ACPI in some BIOS assigns IRQ 12 (mouse
> interrupt) to both the PS/2 mouse device node and the system reserved
> resource node.

And if such a problem was found, please send ACPI data with the
report.  This is very useful info. for our debugging.
To get ACPI data, 
 # acpidump -o foo.dsdt > foo.asl
and send both files to acpi-jp@.  See also acpidump(8).

> To see if this is to be your case, put the following line in
> /boot/device.hints and reboot.
> debug.acpi.disable="sysresource"

I personally, don't have enough time to hack the code for now (sorry),
but I think that newly added `placeholders' code causes the problem
for my first impression.

    for (i = 0; i < 100; i++) {
        rid = i;
        res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 1, 0);
        rid = i;
        res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, 0, ~0, 1, 0);
        rid = i;
        res = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1, 0);

Mike, do you have any idea on this?

Anyway, Yokota-san thank you very much for finding a workaround.

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