Hi Jussi,

Thank you for the patch! Perhaps something to improve:

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

url:    https://github.com/0day-ci/linux/commits/Jussi-Maki/XDP-bonding-support/20210617-053146
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
config: alpha-randconfig-r014-20210617 (attached as .config)
compiler: alpha-linux-gcc (GCC) 9.3.0
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
        # https://github.com/0day-ci/linux/commit/61fabab38aec5b8e0cdc33867e35ea9740da84c8
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Jussi-Maki/XDP-bonding-support/20210617-053146
        git checkout 61fabab38aec5b8e0cdc33867e35ea9740da84c8
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=alpha 

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

All warnings (new ones prefixed by >>):

>> drivers/net/bonding/bond_main.c:4926:1: warning: no previous prototype for 'bond_xdp_get_xmit_slave' [-Wmissing-prototypes]
    4926 | bond_xdp_get_xmit_slave(struct net_device *bond_dev, struct xdp_buff *xdp)
         | ^~~~~~~~~~~~~~~~~~~~~~~


vim +/bond_xdp_get_xmit_slave +4926 drivers/net/bonding/bond_main.c

  4924	
  4925	struct net_device *
> 4926	bond_xdp_get_xmit_slave(struct net_device *bond_dev, struct xdp_buff *xdp)
  4927	{
  4928		struct bonding *bond = netdev_priv(bond_dev);
  4929		struct slave *slave;
  4930	
  4931		/* Caller needs to hold rcu_read_lock() */
  4932	
  4933		switch (BOND_MODE(bond)) {
  4934		case BOND_MODE_ROUNDROBIN:
  4935			slave = bond_xdp_xmit_roundrobin_slave_get(bond, xdp);
  4936			break;
  4937	
  4938		case BOND_MODE_ACTIVEBACKUP:
  4939			slave = bond_xmit_activebackup_slave_get(bond);
  4940			break;
  4941	
  4942		case BOND_MODE_8023AD:
  4943		case BOND_MODE_XOR:
  4944			slave = bond_xdp_xmit_3ad_xor_slave_get(bond, xdp);
  4945			break;
  4946	
  4947		default:
  4948			/* Should never happen. Mode guarded by bond_xdp_check() */
  4949			netdev_err(bond_dev, "Unknown bonding mode %d for xdp xmit\n", BOND_MODE(bond));
  4950			WARN_ON_ONCE(1);
  4951			return NULL;
  4952		}
  4953	
  4954		if (slave)
  4955			return slave->dev;
  4956	
  4957		return NULL;
  4958	}
  4959	

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