kdbm_acpi.ko in 2.6?

I've seen old references to a loadable module called kdbm_acpi.ko which is supposed to provide an interface to the ACPI-CA debugger from the kernel debugger, but the 2.6.x kernel sources don't seem to have a drivers/acpi/kdb source directory anymore. Has the kernel debugger ACPI-CA debugger interface been moved or removed?

- Bruce