Kernel 2.6.6 for SMDK2410 Compilation Problem

I have tried kernel 2.6.6 to 2.6.7-rc3
Using Samsung S3C2410 - SMDK2410, when 'Support for console on S3C2410 serial port' is chosen, I have the following compilation problem:

drivers/built-in.o(.init.text+0x1084): In function serial_s3c2410_console_setup' : undefined reference to uart_parse_options' drivers/built-in.o(.init.text+0x10c0): In function serial_s3c2410_console_setup' : undefined reference to uart_set_options'
make: *** [.tmp_vmlinux1] Error 1

Can anyone help solve this problem?