Re: [PATCH net-next 2/3] r8152: support ECM mode

Hi Hayes,

[auto build test ERROR on net-next/master]

url:    https://github.com/0day-ci/linux/commits/Hayes-Wang/r8152-configuration-setting/20160907-192351
config: x86_64-randconfig-s0-09190146 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   drivers/built-in.o: In function `rtl_ecm_bind':
   r8152.c:(.text+0x64b43c): undefined reference to `usbnet_cdc_bind'
   r8152.c:(.text+0x64b59e): undefined reference to `usbnet_cdc_unbind'

quoted

drivers/built-in.o:(.rodata+0x272438): undefined reference to `usbnet_cdc_unbind'
drivers/built-in.o:(.rodata+0x272460): undefined reference to `usbnet_cdc_status'

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