编译内核出如下错误，帮忙看看是那个部分的配置有问题？

duyuyu

delay.c:59: warning: type defaults to `int' in declaration of `__cyclone_delay'
drivers/i2c/i2c.o(.text.init+0x1160): In function `dmi_scan_machine':
: multiple definition of `dmi_scan_machine'
arch/i386/kernel/kernel.o(.text.init+0x3ee0): first defined here
ld: Warning: size of symbol `dmi_scan_machine' changed from 27 to 73 in drivers/i2c/i2c.o
drivers/char/char.o(.text+0x6b3b3): In function `i8k_keys_poll':
: undefined reference to `handle_scancode'
drivers/char/char.o(.text+0x6b3ce): In function `i8k_keys_poll':
: undefined reference to `handle_scancode'
drivers/char/char.o(.text+0x6b3e4): In function `i8k_keys_poll':
: undefined reference to `handle_scancode'
drivers/char/char.o(.text+0x6b404): In function `i8k_keys_poll':
: undefined reference to `handle_scancode'
drivers/char/char.o(.text+0x8d679): In function `gericom_init':
: undefined reference to `apm_battery_hook_sem'
drivers/char/char.o(.text+0x8d67f): In function `gericom_init':
: undefined reference to `apm_battery_hook_sem'
drivers/char/char.o(.text+0x8d68f): In function `gericom_init':
: undefined reference to `apm_battery_hook'
drivers/char/char.o(.text+0x8d695): In function `gericom_init':
: undefined reference to `apm_battery_hook_sem'
drivers/char/char.o(.text+0x8d6b1): In function `gericom_exit':
: undefined reference to `apm_battery_hook_sem'
drivers/char/char.o(.text+0x8d6b7): In function `gericom_exit':
: undefined reference to `apm_battery_hook_sem'
drivers/char/char.o(.text+0x8d6c4): In function `gericom_exit':
: undefined reference to `apm_battery_hook'
drivers/char/char.o(.text+0x8d6ca): In function `gericom_exit':
: undefined reference to `apm_battery_hook_sem'
drivers/scsi/scsidrv.o(.data+0x24294): undefined reference to `local symbols in discarded section .text.exit'
drivers/i2c/i2c.o(.text.init+0xf2): In function `i2c_init_all':
: undefined reference to `i2c_i810i2c_init'
drivers/sensors/sensor.o(.text.init+0x42): In function `sensors_init_all':
: undefined reference to `sensors_pcf8574_init'
drivers/sensors/sensor.o(.text.init+0x47): In function `sensors_init_all':
: undefined reference to `sensors_pcf8591_init'
drivers/sensors/sensor.o(.text.init+0x6a): In function `sensors_init_all':
: undefined reference to `sensors_vt8231_init'