When making kernel 2.6.14 (ck2) I get this error:

drivers/built-in.o(.text+0x10e3f2): In function `init_nandsim':
nandsim.c: undefined reference to `nand_flash_ids'
drivers/built-in.o(.text+0x10e3fb):nandsim.c: undefined reference to `nand_flash_ids'
drivers/built-in.o(.init.text+0x830c): In function `ns_init_module':
: undefined reference to `nand_scan'
drivers/built-in.o(.init.text+0x8399): In function `ns_init_module':
: undefined reference to `nand_default_bbt'
drivers/built-in.o(.exit.text+0xa45): In function `ns_cleanup_module':
nandsim.c: undefined reference to `nand_release'
make: *** [.tmp_vmlinux1] Error 1

Any help much appreciated.