2.6.13内核移植

我在移植2.6.13内核的时候，出现这种错误，请问是什么问题？
arch/arm/mach-s3c2410/tq2440.c: In function `tq2440_init':
arch/arm/mach-s3c2410/tq2440.c:693: error: `tq2440_lcdcfg' undeclared (first use in this function)
arch/arm/mach-s3c2410/tq2440.c:693: error: (Each undeclared identifier is reported only once
arch/arm/mach-s3c2410/tq2440.c:693: error: for each function it appears in.)
arch/arm/mach-s3c2410/tq2440.c: At top level:
arch/arm/mach-s3c2410/tq2440.c:620: warning: 'usb_simtec_enableoc' defined but not used
make[1]: *** [arch/arm/mach-s3c2410/tq2440.o] 错误 1
make: *** [arch/arm/mach-s3c2410] 错误 2

tq2440_lcdcfg这个没有定义过。在arch/arm/mach-s3c2410/tq2440.c中定义的。