Hi, On 19 March 2017 at 19:42, kbuild test robot <lkp@xxxxxxxxx> wrote: > Hi Baolin, > > [auto build test ERROR on balbi-usb/next] > [also build test ERROR on v4.11-rc2 next-20170310] > [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] > > url: https://github.com/0day-ci/linux/commits/Baolin-Wang/usb-phy-Introduce-one-extcon-device-into-usb-phy/20170319-175509 > base: https://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git next > config: i386-randconfig-i1-201712 (attached as .config) > compiler: gcc-4.8 (Debian 4.8.4-1) 4.8.4 > reproduce: > # save the attached .config to linux build tree > make ARCH=i386 > > All errors (new ones prefixed by >>): > > drivers/built-in.o: In function `usb_add_extcon': >>> phy.c:(.text+0x231580): undefined reference to `extcon_get_edev_by_phandle' >>> phy.c:(.text+0x2315d0): undefined reference to `devm_extcon_register_notifier' > phy.c:(.text+0x231629): undefined reference to `devm_extcon_register_notifier' I am not sure how the errors were happened, since we will always select EXTCON if we have selected USB_PHY, moreover we have included the "linux/extcon.h" in phy.h file. -- Baolin.wang Best Regards -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html