[cilium:pr/netkit-iouring6 2/2] net/core/netdev_rx_queue.c:21:6: warning: no previous prototype for function 'netdev_rx_queue_peer'

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

tree:   https://github.com/cilium/linux.git pr/netkit-iouring6
head:   7bfb4fc5f460441d05b483647e4f4c59c4afaeb1
commit: 7bfb4fc5f460441d05b483647e4f4c59c4afaeb1 [2/2] net: Implement netdev_nl_bind_queue_doit
config: x86_64-kexec (https://download.01.org/0day-ci/archive/20251127/202511272127.HJ4NxkVL-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251127/202511272127.HJ4NxkVL-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/202511272127.HJ4NxkVL-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> net/core/netdev_rx_queue.c:21:6: warning: no previous prototype for function 'netdev_rx_queue_peer' [-Wmissing-prototypes]
      21 | void netdev_rx_queue_peer(struct net_device *src_dev,
         |      ^
   net/core/netdev_rx_queue.c:21:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      21 | void netdev_rx_queue_peer(struct net_device *src_dev,
         | ^
         | static 
>> net/core/netdev_rx_queue.c:34:6: warning: no previous prototype for function 'netdev_rx_queue_unpeer' [-Wmissing-prototypes]
      34 | void netdev_rx_queue_unpeer(struct net_device *src_dev,
         |      ^
   net/core/netdev_rx_queue.c:34:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      34 | void netdev_rx_queue_unpeer(struct net_device *src_dev,
         | ^
         | static 
   net/core/netdev_rx_queue.c:55:11: error: no member named 'peer' in 'struct netdev_rx_queue'
      55 |         if (rxq->peer) {
         |             ~~~  ^
   net/core/netdev_rx_queue.c:58:14: error: no member named 'peer' in 'struct netdev_rx_queue'
      58 |                 rxq = rxq->peer;
         |                       ~~~  ^
>> net/core/netdev_rx_queue.c:66:1: warning: no previous prototype for function 'netif_get_rx_queue_peer_locked' [-Wmissing-prototypes]
      66 | netif_get_rx_queue_peer_locked(struct net_device **dev, unsigned int *rxq_idx)
         | ^
   net/core/netdev_rx_queue.c:65:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      65 | struct netdev_rx_queue *
         | ^
         | static 
>> net/core/netdev_rx_queue.c:81:6: warning: no previous prototype for function 'netif_put_rx_queue_peer_locked' [-Wmissing-prototypes]
      81 | void netif_put_rx_queue_peer_locked(struct net_device *orig_dev,
         |      ^
   net/core/netdev_rx_queue.c:81:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      81 | void netif_put_rx_queue_peer_locked(struct net_device *orig_dev,
         | ^
         | static 
   4 warnings and 2 errors generated.


vim +/netdev_rx_queue_peer +21 net/core/netdev_rx_queue.c

    20	
  > 21	void netdev_rx_queue_peer(struct net_device *src_dev,
    22				  struct netdev_rx_queue *src_rxq,
    23				  struct netdev_rx_queue *dst_rxq)
    24	{
    25		netdev_assert_locked(src_dev);
    26		netdev_assert_locked(dst_rxq->dev);
    27	
    28		netdev_hold(src_dev, &src_rxq->lease_tracker, GFP_KERNEL);
    29	
    30		WRITE_ONCE(src_rxq->lease, dst_rxq);
    31		WRITE_ONCE(dst_rxq->lease, src_rxq);
    32	}
    33	
  > 34	void netdev_rx_queue_unpeer(struct net_device *src_dev,
    35				    struct netdev_rx_queue *src_rxq,
    36				    struct netdev_rx_queue *dst_rxq)
    37	{
    38		WARN_ON_ONCE(READ_ONCE(dst_rxq->dev->reg_state) != NETREG_UNREGISTERING);
    39	
    40		netdev_assert_locked(dst_rxq->dev);
    41		netdev_assert_locked(src_dev);
    42	
    43		WRITE_ONCE(src_rxq->lease, NULL);
    44		WRITE_ONCE(dst_rxq->lease, NULL);
    45	
    46		netdev_put(src_dev, &src_rxq->lease_tracker);
    47	}
    48	
    49	static struct netdev_rx_queue *
    50	__netif_get_rx_queue_peer(struct net_device **dev, unsigned int *rxq_idx)
    51	{
    52		struct net_device *orig_dev = *dev;
    53		struct netdev_rx_queue *rxq = __netif_get_rx_queue(orig_dev, *rxq_idx);
    54	
  > 55		if (rxq->peer) {
    56			if (orig_dev->dev.parent)
    57				return NULL;
    58			rxq = rxq->peer;
    59			*rxq_idx = get_netdev_rx_queue_index(rxq);
    60			*dev = rxq->dev;
    61		}
    62		return rxq;
    63	}
    64	
    65	struct netdev_rx_queue *
  > 66	netif_get_rx_queue_peer_locked(struct net_device **dev, unsigned int *rxq_idx)
    67	{
    68		struct net_device *orig_dev = *dev;
    69		struct netdev_rx_queue *rxq;
    70	
    71		/* Locking order is always from the virtual to the physical device
    72		 * see netdev_nl_bind_queue_doit().
    73		 */
    74		netdev_ops_assert_locked(orig_dev);
    75		rxq = __netif_get_rx_queue_peer(dev, rxq_idx);
    76		if (rxq && orig_dev != *dev)
    77			netdev_lock(*dev);
    78		return rxq;
    79	}
    80	
  > 81	void netif_put_rx_queue_peer_locked(struct net_device *orig_dev,
    82					    struct net_device *dev)
    83	{
    84		if (orig_dev != dev)
    85			netdev_unlock(dev);
    86	}
    87	

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