Hi Cole,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on net/master]

url:    https://github.com/0day-ci/linux/commits/Cole-Dishington/net-netfilter-Fix-port-selection-of-FTP-for-NF_NAT_RANGE_PROTO_SPECIFIED/20210907-101823
base:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git b539c44df067ac116ec1b58b956efda51b6a7fc1
config: s390-defconfig (attached as .config)
compiler: s390-linux-gcc (GCC) 11.2.0
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/3d790f5d7c3d6069948749b4697090adfcc48e51
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Cole-Dishington/net-netfilter-Fix-port-selection-of-FTP-for-NF_NAT_RANGE_PROTO_SPECIFIED/20210907-101823
        git checkout 3d790f5d7c3d6069948749b4697090adfcc48e51
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=s390 

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 >>, old ones prefixed by <<):

>> ERROR: modpost: "nf_nat_l4proto_unique_tuple" [net/netfilter/nf_nat_ftp.ko] undefined!

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