On 19 March 2017 at 19:42, kbuild test robot <l...@intel.com> 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.

Best Regards

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