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: um-randconfig-c024-20210528 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # 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
        make W=1 ARCH=um 

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 >>):

   /usr/bin/ld: arch/um/drivers/vector_transports.o: in function `raw_verify_header':
>> vector_transports.c:(.text+0x7b1): undefined reference to `sysctl_flow_dissect_vnet_hdr_key'
   collect2: error: ld returned 1 exit status

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0-DAY CI Kernel Test Service, Intel Corporation
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