Re: [RFC bpf-next 12/23] xdp: Add checksum hint

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

Hi Larysa,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build warnings:

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

url:    https://github.com/intel-lab-lkp/linux/commits/Larysa-Zaremba/ice-make-RX-hash-reading-code-more-reusable/20230825-034643
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
patch link:    https://lore.kernel.org/r/20230824192703.712881-13-larysa.zaremba%40intel.com
patch subject: [RFC bpf-next 12/23] xdp: Add checksum hint
config: x86_64-randconfig-r013-20230825 (https://download.01.org/0day-ci/archive/20230825/202308250652.iZvvascZ-lkp@intel.com/config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce: (https://download.01.org/0day-ci/archive/20230825/202308250652.iZvvascZ-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/202308250652.iZvvascZ-lkp@intel.com/

All warnings (new ones prefixed by >>):

   net/core/xdp.c:713:17: warning: no previous declaration for 'bpf_xdp_metadata_rx_timestamp' [-Wmissing-declarations]
    __bpf_kfunc int bpf_xdp_metadata_rx_timestamp(const struct xdp_md *ctx, u64 *timestamp)
                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   net/core/xdp.c:735:17: warning: no previous declaration for 'bpf_xdp_metadata_rx_hash' [-Wmissing-declarations]
    __bpf_kfunc int bpf_xdp_metadata_rx_hash(const struct xdp_md *ctx, u32 *hash,
                    ^~~~~~~~~~~~~~~~~~~~~~~~
   net/core/xdp.c:768:17: warning: no previous declaration for 'bpf_xdp_metadata_rx_vlan_tag' [-Wmissing-declarations]
    __bpf_kfunc int bpf_xdp_metadata_rx_vlan_tag(const struct xdp_md *ctx,
                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> net/core/xdp.c:791:17: warning: no previous declaration for 'bpf_xdp_metadata_rx_csum' [-Wmissing-declarations]
    __bpf_kfunc int bpf_xdp_metadata_rx_csum(const struct xdp_md *ctx,
                    ^~~~~~~~~~~~~~~~~~~~~~~~


vim +/bpf_xdp_metadata_rx_csum +791 net/core/xdp.c

   774	
   775	/**
   776	 * bpf_xdp_metadata_rx_csum - Get checksum status with additional info.
   777	 * @ctx: XDP context pointer.
   778	 * @csum_status: Destination for checksum status.
   779	 * @csum: Destination for complete checksum.
   780	 *
   781	 * Status (@csum_status) is a bitfield that informs, what checksum
   782	 * processing was performed. If ``XDP_CHECKSUM_COMPLETE`` in status is set,
   783	 * second argument (@csum) contains a checksum, calculated over the entire
   784	 * packet.
   785	 *
   786	 * Return:
   787	 * * Returns 0 on success or ``-errno`` on error.
   788	 * * ``-EOPNOTSUPP`` : device driver doesn't implement kfunc
   789	 * * ``-ENODATA``    : Checksum status is unknown
   790	 */
 > 791	__bpf_kfunc int bpf_xdp_metadata_rx_csum(const struct xdp_md *ctx,
   792						 enum xdp_csum_status *csum_status,
   793						 __wsum *csum)
   794	{
   795		return -EOPNOTSUPP;
   796	}
   797	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki