i6300esb uses fuctions defined in watchdog_core.c, and when CONFIG_WATCHDOG_CORE is not set we have this build error: drivers/watchdog/i6300esb.o: In function `esb_remove': i6300esb.c:(.text+0xcc): undefined reference to `watchdog_unregister_device' drivers/watchdog/i6300esb.o: In function `esb_probe': i6300esb.c:(.text+0x2a1): undefined reference to `watchdog_init_timeout' i6300esb.c:(.text+0x388): undefined reference to `watchdog_register_device' make: *** [Makefile:1029: vmlinux] Error 1 Fix this by selecting CONFIG_WATCHDOG_CORE when I6300ESB_WDT is set. Fixes: 7af4ac8772a8f ("watchdog: i6300esb: use the watchdog subsystem") Signed-off-by: Matteo Croce <mcroce@xxxxxxxxxx> --- drivers/watchdog/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig index aff773bcebdb..5e2fa5abe5ff 100644 --- a/drivers/watchdog/Kconfig +++ b/drivers/watchdog/Kconfig @@ -1008,6 +1008,7 @@ config WAFER_WDT config I6300ESB_WDT tristate "Intel 6300ESB Timer/Watchdog" depends on PCI + select WATCHDOG_CORE ---help--- Hardware driver for the watchdog timer built into the Intel 6300ESB controller hub. -- 2.14.3 -- To unsubscribe from this list: send the line "unsubscribe linux-watchdog" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html