Re: [PATCH bpf-next 2/3] bpf,fou: Add bpf_skb_{set,get}_fou_encap kfuncs

[kernel test robot]

Hi Christian,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on bpf-next/master]

url:    https://github.com/intel-lab-lkp/linux/commits/Christian-Ehrig/ipip-ip_tunnel-sit-Add-FOU-support-for-externally-controlled-ipip-devices/20230402-033512
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
patch link:    https://lore.kernel.org/r/65b05e447b28d32fb0e07275dc988989f358da2c.1680379518.git.cehrig%40cloudflare.com
patch subject: [PATCH bpf-next 2/3] bpf,fou: Add bpf_skb_{set,get}_fou_encap kfuncs
config: i386-randconfig-a005 (https://download.01.org/0day-ci/archive/20230402/202304020430.KvQEwmII-lkp@xxxxxxxxx/config)
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/111ef54093a724110ca63e6a6279e60dd669094b
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Christian-Ehrig/ipip-ip_tunnel-sit-Add-FOU-support-for-externally-controlled-ipip-devices/20230402-033512
        git checkout 111ef54093a724110ca63e6a6279e60dd669094b
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=i386 olddefconfig
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash net/ipv4/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Link: https://lore.kernel.org/oe-kbuild-all/202304020430.KvQEwmII-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

>> net/ipv4/fou_bpf.c:114:5: warning: no previous prototype for 'register_fou_bpf' [-Wmissing-prototypes]
     114 | int register_fou_bpf(void)
         |     ^~~~~~~~~~~~~~~~


vim +/register_fou_bpf +114 net/ipv4/fou_bpf.c

   113	
 > 114	int register_fou_bpf(void)

-- 
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