Re: [nf-next PATCH v2] netfilter: include: uapi: Use C99 flexible array member

[kernel test robot <lkp@intel.com>]

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Hi Phil,

Thank you for the patch! Yet something to improve:

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

url:    https://github.com/0day-ci/linux/commits/Phil-Sutter/netfilter-include-uapi-Use-C99-flexible-array-member/20200719-180355
base:   https://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next.git master
config: x86_64-allyesconfig (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 3504acc33e8b9ddd7de71d75cdc329a14dbf58d9)
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
        # 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 >>):

   In file included from <built-in>:1:
>> ./usr/include/linux/netfilter_bridge/ebtables.h:90:13: error: expected ';' at end of declaration list
           char data[] __aligned(__alignof__(struct ebt_replace));
                      ^
                      ;
   ./usr/include/linux/netfilter_bridge/ebtables.h:132:22: error: expected ';' at end of declaration list
           unsigned char data[] __aligned(__alignof__(struct ebt_replace));
                               ^
                               ;
   ./usr/include/linux/netfilter_bridge/ebtables.h:145:22: error: expected ';' at end of declaration list
           unsigned char data[] __aligned(__alignof__(struct ebt_replace));
                               ^
                               ;
   ./usr/include/linux/netfilter_bridge/ebtables.h:158:22: error: expected ';' at end of declaration list
           unsigned char data[] __aligned(__alignof__(struct ebt_replace));
                               ^
                               ;
>> ./usr/include/linux/netfilter_bridge/ebtables.h:163:26: warning: field 'target' with variable sized type 'struct ebt_entry_target' not at the end of a struct or class is a GNU extension [-Wgnu-variable-sized-type-not-at-end]
           struct ebt_entry_target target;
                                   ^
   ./usr/include/linux/netfilter_bridge/ebtables.h:191:23: error: expected ';' at end of declaration list
           unsigned char elems[] __aligned(__alignof__(struct ebt_replace));
                                ^
                                ;
   1 warning and 5 errors generated.
--
   In file included from <built-in>:1:
   In file included from ./usr/include/linux/netfilter_ipv6/ip6_tables.h:24:
>> ./usr/include/linux/netfilter/x_tables.h:66:25: warning: field 'target' with variable sized type 'struct xt_entry_target' not at the end of a struct or class is a GNU extension [-Wgnu-variable-sized-type-not-at-end]
           struct xt_entry_target target;
                                  ^
   ./usr/include/linux/netfilter/x_tables.h:71:25: warning: field 'target' with variable sized type 'struct xt_entry_target' not at the end of a struct or class is a GNU extension [-Wgnu-variable-sized-type-not-at-end]
           struct xt_entry_target target;
                                  ^
   In file included from <built-in>:1:
>> ./usr/include/linux/netfilter_ipv6/ip6_tables.h:131:20: warning: field 'entry' with variable sized type 'struct ip6t_entry' not at the end of a struct or class is a GNU extension [-Wgnu-variable-sized-type-not-at-end]
           struct ip6t_entry entry;
                             ^
   ./usr/include/linux/netfilter_ipv6/ip6_tables.h:136:20: warning: field 'entry' with variable sized type 'struct ip6t_entry' not at the end of a struct or class is a GNU extension [-Wgnu-variable-sized-type-not-at-end]
           struct ip6t_entry entry;
                             ^
   4 warnings generated.
--
   In file included from <built-in>:1:
   In file included from ./usr/include/linux/netfilter_arp/arpt_mangle.h:4:
   In file included from ./usr/include/linux/netfilter_arp/arp_tables.h:18:
>> ./usr/include/linux/netfilter/x_tables.h:66:25: warning: field 'target' with variable sized type 'struct xt_entry_target' not at the end of a struct or class is a GNU extension [-Wgnu-variable-sized-type-not-at-end]
           struct xt_entry_target target;
                                  ^
   ./usr/include/linux/netfilter/x_tables.h:71:25: warning: field 'target' with variable sized type 'struct xt_entry_target' not at the end of a struct or class is a GNU extension [-Wgnu-variable-sized-type-not-at-end]
           struct xt_entry_target target;
                                  ^
   2 warnings generated.

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

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