net/core/xdp.c:737:5: warning: no previous declaration for 'bpf_xdp_metadata_rx_hash'

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   8bc9e6515183935fa0cccaf67455c439afe4982b
commit: 3d76a4d3d4e591af3e789698affaad88a5a8e8ab bpf: XDP metadata RX kfuncs
date:   9 months ago
config: i386-defconfig (https://download.01.org/0day-ci/archive/20231102/202311020203.CdXuCwy2-lkp@intel.com/config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231102/202311020203.CdXuCwy2-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311020203.CdXuCwy2-lkp@intel.com/

All warnings (new ones prefixed by >>):

   net/core/xdp.c:725:5: warning: no previous declaration for 'bpf_xdp_metadata_rx_timestamp' [-Wmissing-declarations]
    int bpf_xdp_metadata_rx_timestamp(const struct xdp_md *ctx, u64 *timestamp)
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> net/core/xdp.c:737:5: warning: no previous declaration for 'bpf_xdp_metadata_rx_hash' [-Wmissing-declarations]
    int bpf_xdp_metadata_rx_hash(const struct xdp_md *ctx, u32 *hash)
        ^~~~~~~~~~~~~~~~~~~~~~~~


vim +/bpf_xdp_metadata_rx_hash +737 net/core/xdp.c

   729	
   730	/**
   731	 * bpf_xdp_metadata_rx_hash - Read XDP frame RX hash.
   732	 * @ctx: XDP context pointer.
   733	 * @hash: Return value pointer.
   734	 *
   735	 * Returns 0 on success or ``-errno`` on error.
   736	 */
 > 737	int bpf_xdp_metadata_rx_hash(const struct xdp_md *ctx, u32 *hash)
   738	{
   739		return -EOPNOTSUPP;
   740	}
   741	

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