Re: [PATCH net-next v2 2/3] virtio_net: add optional flow dissection in virtio_net_hdr_to_skb

Hi Tanner,

Thank you for the patch! Yet something to improve:

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

url:    https://github.com/0day-ci/linux/commits/Tanner-Love/virtio_net-add-optional-flow-dissection-in-virtio_net_hdr_to_skb/20210528-102939
base:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git af9207adb6d9986be6ed64e76705cf513087e724
config: csky-randconfig-r004-20210526 (attached as .config)
compiler: csky-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://github.com/0day-ci/linux/commit/a7db8fd377c0ea96e7e810c9b0164013043ad83c
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Tanner-Love/virtio_net-add-optional-flow-dissection-in-virtio_net_hdr_to_skb/20210528-102939
        git checkout a7db8fd377c0ea96e7e810c9b0164013043ad83c
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=csky 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <redacted>

All errors (new ones prefixed by >>):

   csky-linux-ld: drivers/net/tun.o: in function `$d':

quoted

tun.c:(.text+0x5eec): undefined reference to `sysctl_flow_dissect_vnet_hdr_key'
csky-linux-ld: tun.c:(.text+0x601c): undefined reference to `sysctl_flow_dissect_vnet_hdr_key'

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for LOCKDEP
   Depends on DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT && (FRAME_POINTER || MIPS || PPC || S390 || MICROBLAZE || ARM || ARC || X86)
   Selected by
   - PROVE_LOCKING && DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT
   - DEBUG_LOCK_ALLOC && DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT

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