tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   ec2618180c3450d06a6a4ba951d4c9a2c689b517
commit: cac6fb015f719104e60b1c68c15ca5b734f57b9c [2317/2770] usb: class: cdc-wdm: WWAN framework integration
config: parisc-randconfig-r033-20210513 (attached as .config)
compiler: hppa-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=cac6fb015f719104e60b1c68c15ca5b734f57b9c
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout cac6fb015f719104e60b1c68c15ca5b734f57b9c
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=parisc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   hppa-linux-ld: drivers/usb/class/cdc-wdm.o: in function `wdm_wwan_port_stop':
>> (.text+0xf28): undefined reference to `wwan_port_get_drvdata'
   hppa-linux-ld: drivers/usb/class/cdc-wdm.o: in function `wdm_wwan_port_tx':
   (.text+0xf88): undefined reference to `wwan_port_get_drvdata'
>> hppa-linux-ld: (.text+0x1038): undefined reference to `wwan_port_txoff'
   hppa-linux-ld: drivers/usb/class/cdc-wdm.o: in function `wdm_wwan_port_start':
   (.text+0x1064): undefined reference to `wwan_port_get_drvdata'
>> hppa-linux-ld: (.text+0x10c4): undefined reference to `wwan_port_txon'
   hppa-linux-ld: drivers/usb/class/cdc-wdm.o: in function `wdm_wwan_port_tx_complete':
>> (.text+0x1100): undefined reference to `wwan_port_txon'
   hppa-linux-ld: drivers/usb/class/cdc-wdm.o: in function `wdm_in_callback':
   (.text+0x13cc): undefined reference to `wwan_port_rx'
   hppa-linux-ld: drivers/usb/class/cdc-wdm.o: in function `wdm_disconnect':
>> (.text+0x18d0): undefined reference to `wwan_remove_port'
   hppa-linux-ld: drivers/usb/class/cdc-wdm.o: in function `wdm_create':
>> (.text+0x1de8): undefined reference to `wwan_create_port'

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org