ITCO_WDT selects I2C_I801 but does not select its dependencies (I2C.) This can result in link-time failures: drivers/built-in.o: In function `i801_remove': i2c-i801.c:(.text+0x1a6126): undefined reference to `i2c_del_adapter' drivers/built-in.o: In function `dmi_check_onboard_devices': i2c-i801.c:(.text+0x1a7531): undefined reference to `i2c_new_device' drivers/built-in.o: In function `i801_probe': i2c-i801.c:(.text+0x1a7aa8): undefined reference to `i2c_add_adapter' i2c-i801.c:(.text+0x1a7e14): undefined reference to `i2c_new_device' So we must select I2C as well. Reported-by: Jim Davis <jim.epost@xxxxxxxxx> Signed-off-by: Jean Delvare <jdelvare@xxxxxxx> Fixes: 2a7a0e9bf7 ("watchdog: iTCO_wdt: Add support for TCO on Intel Sunrisepoint") Cc: Matt Fleming <matt.fleming@xxxxxxxxx> Cc: Guenter Roeck <linux@xxxxxxxxxxxx> Cc: Lee Jones <lee.jones@xxxxxxxxxx> Cc: Wim Van Sebroeck <wim@xxxxxxxxx> --- drivers/watchdog/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- linux-4.3-rc2.orig/drivers/watchdog/Kconfig 2015-09-24 11:43:29.959432358 +0200 +++ linux-4.3-rc2/drivers/watchdog/Kconfig 2015-09-25 09:56:20.518840112 +0200 @@ -818,6 +818,7 @@ config ITCO_WDT depends on (X86 || IA64) && PCI select WATCHDOG_CORE select LPC_ICH if !EXPERT + select I2C if !EXPERT select I2C_I801 if !EXPERT ---help--- Hardware driver for the intel TCO timer based watchdog devices. -- Jean Delvare SUSE L3 Support -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html