Undefined symbols in ACPI module

[Nate Lawson]

You probably compiled a module with ACPI_DEBUG and then turned that option
off.

   cd /sys/modules/acpi/acpi && make ACPI_DEBUG=1 clean
   cd $KERNCONF/sys/modules/acpi/acpi && make ACPI_DEBUG=1 clean

(KERNCONF is your kernel compile dir).

-Nate