tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   f8f60f322f0640c8edda2942ca5f84b7a27c417a
commit: 6c6fa1a00ad3df994c96af9468cc83f225df9df4 [4179/7443] net: ethernet: renesas: rswitch: Add R-Car Gen4 gPTP support
config: loongarch-randconfig-r011-20221113
compiler: loongarch64-linux-gcc (GCC) 12.1.0
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://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=6c6fa1a00ad3df994c96af9468cc83f225df9df4
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout 6c6fa1a00ad3df994c96af9468cc83f225df9df4
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=loongarch SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

   loongarch64-linux-ld: drivers/net/ethernet/renesas/rswitch.o: in function `rswitch_get_ts_info':
>> drivers/net/ethernet/renesas/rswitch.c:1544: undefined reference to `ptp_clock_index'
   loongarch64-linux-ld: drivers/net/ethernet/renesas/rcar_gen4_ptp.o: in function `rcar_gen4_ptp_register':
>> drivers/net/ethernet/renesas/rcar_gen4_ptp.c:153: undefined reference to `ptp_clock_register'
   loongarch64-linux-ld: drivers/net/ethernet/renesas/rcar_gen4_ptp.o: in function `rcar_gen4_ptp_unregister':
>> drivers/net/ethernet/renesas/rcar_gen4_ptp.c:167: undefined reference to `ptp_clock_unregister'


vim +1544 drivers/net/ethernet/renesas/rswitch.c

  1539	
  1540	static int rswitch_get_ts_info(struct net_device *ndev, struct ethtool_ts_info *info)
  1541	{
  1542		struct rswitch_device *rdev = netdev_priv(ndev);
  1543	
> 1544		info->phc_index = ptp_clock_index(rdev->priv->ptp_priv->clock);
  1545		info->so_timestamping = SOF_TIMESTAMPING_TX_SOFTWARE |
  1546					SOF_TIMESTAMPING_RX_SOFTWARE |
  1547					SOF_TIMESTAMPING_SOFTWARE |
  1548					SOF_TIMESTAMPING_TX_HARDWARE |
  1549					SOF_TIMESTAMPING_RX_HARDWARE |
  1550					SOF_TIMESTAMPING_RAW_HARDWARE;
  1551		info->tx_types = BIT(HWTSTAMP_TX_OFF) | BIT(HWTSTAMP_TX_ON);
  1552		info->rx_filters = BIT(HWTSTAMP_FILTER_NONE) | BIT(HWTSTAMP_FILTER_ALL);
  1553	
  1554		return 0;
  1555	}
  1556	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp