请教编译内核的问题

benladan

我编译了几次
都有错误
请教高手则么解决
错误如下：
drivers/built-in.o(.text+0x3fa6b): In function `mgsl_isr_io_pin':
: undefined reference to `hdlc_set_carrier'
drivers/built-in.o(.text+0x46ce: In function `hdlcdev_open':
: undefined reference to `hdlc_open'
drivers/built-in.o(.text+0x46e0c): In function `hdlcdev_open':
: undefined reference to `hdlc_set_carrier'
drivers/built-in.o(.text+0x46e4f): In function `hdlcdev_close':
: undefined reference to `hdlc_close'
drivers/built-in.o(.text+0x4708f): In function `hdlcdev_ioctl':
: undefined reference to `hdlc_ioctl'
drivers/built-in.o(.text+0x472a4): In function `hdlcdev_init':
: undefined reference to `alloc_hdlcdev'
drivers/built-in.o(.text+0x4733: In function `hdlcdev_init':
: undefined reference to `register_hdlc_device'
drivers/built-in.o(.text+0x47377): In function `hdlcdev_exit':
: undefined reference to `unregister_hdlc_device'
make[1]: *** [vmlinux] 错误 1
make[1]: Leaving directory `/usr/src/kernel-source-2.6.11'
make: *** [stamp-build] 错误 2