2.4.6-ac1 parport_pc broken

Going from 2.4.5-ac24 to 2.4.6-ac1 drivers/parport/parport_pc.c fails depmod with unresolved symbols

Diff for the two versions is:
2831d2830
< #if defined(CONFIG_PNPBIOS) || defined(CONFIG_PNPBIOS_MODULE) 2838d2836
< #endif

I don't have either of these set, so the bracketed code gets dropped, so the compiler complains:
parport_pc.c: In function `parport_pc_find_ports':
parport_pc.c:2832: warning: implicit declaration of function `pnpbios_find_device'
parport_pc.c:2832: warning: assignment makes pointer from integer without a cast
parport_pc.c:2833: warning: implicit declaration of function `init_pnp040x'
parport_pc.c:2835: warning: assignment makes pointer from integer without a cast