Hi Cole,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on nf-next/master]
[also build test ERROR on nf/master ipvs/master v5.14-rc3 next-20210727]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Cole-Dishington/net-netfilter-Fix-port-selection-of-FTP-for-NF_NAT_RANGE_PROTO_SPECIFIED/20210728-112306
base:   https://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next.git master
config: x86_64-randconfig-a016-20210728 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project c49df15c278857adecd12db6bb1cdc96885f7079)
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
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://github.com/0day-ci/linux/commit/2e0f4c593d92890a9a5b0098b3f20a6486b4019d
        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/20210728-112306
        git checkout 2e0f4c593d92890a9a5b0098b3f20a6486b4019d
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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

All error/warnings (new ones prefixed by >>, old ones prefixed by <<):

>> ERROR: modpost: "nf_nat_l4proto_unique_tuple" [net/netfilter/nf_nat_ftp.ko] undefined!
--
>> net/netfilter/nf_nat_core.c:363:6: warning: no previous prototype for function 'nf_nat_l4proto_unique_tuple' [-Wmissing-prototypes]
   void nf_nat_l4proto_unique_tuple(struct nf_conntrack_tuple *tuple,
        ^
   net/netfilter/nf_nat_core.c:363:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void nf_nat_l4proto_unique_tuple(struct nf_conntrack_tuple *tuple,
   ^
   static 
   1 warning generated.

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