tree:   https://github.com/frank-w/BPI-R2-4.14 5.15-rtl8367dsa
head:   99ce3a58aacb46675bb47e35e306f2285064862d
commit: 66b4718b5238ffbbea2a2562ab906dc676957a4f [32/37] rtl8367: add driver from openwrt
config: m68k-allmodconfig (attached as .config)
compiler: m68k-linux-gcc (GCC) 11.2.0
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/frank-w/BPI-R2-4.14/commit/66b4718b5238ffbbea2a2562ab906dc676957a4f
        git remote add frank-w-bpi-r2-4.14 https://github.com/frank-w/BPI-R2-4.14
        git fetch --no-tags frank-w-bpi-r2-4.14 5.15-rtl8367dsa
        git checkout 66b4718b5238ffbbea2a2562ab906dc676957a4f
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=m68k 

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

All errors (new ones prefixed by >>):

>> drivers/net/phy/swconfig.c:1061:1: error: no previous prototype for 'of_switch_load_portmap' [-Werror=missing-prototypes]
    1061 | of_switch_load_portmap(struct switch_dev *dev)
         | ^~~~~~~~~~~~~~~~~~~~~~
   cc1: all warnings being treated as errors
--
>> drivers/net/phy/rtl8366_smi.c:257:5: error: no previous prototype for '__rtl8366_mdio_read_reg' [-Werror=missing-prototypes]
     257 | int __rtl8366_mdio_read_reg(struct rtl8366_smi *smi, u32 addr, u32 *data)
         |     ^~~~~~~~~~~~~~~~~~~~~~~
>> drivers/net/phy/rtl8366_smi.c:1533:5: error: no previous prototype for 'rtl8366_smi_probe_of' [-Werror=missing-prototypes]
    1533 | int rtl8366_smi_probe_of(struct platform_device *pdev, struct rtl8366_smi *smi)
         |     ^~~~~~~~~~~~~~~~~~~~
>> drivers/net/phy/rtl8366_smi.c:1580:5: error: no previous prototype for 'rtl8366_smi_probe_plat' [-Werror=missing-prototypes]
    1580 | int rtl8366_smi_probe_plat(struct platform_device *pdev, struct rtl8366_smi *smi)
         |     ^~~~~~~~~~~~~~~~~~~~~~
   cc1: all warnings being treated as errors


vim +/of_switch_load_portmap +1061 drivers/net/phy/swconfig.c

  1058	
  1059	#ifdef CONFIG_OF
  1060	void
> 1061	of_switch_load_portmap(struct switch_dev *dev)
  1062	{
  1063		struct device_node *port;
  1064	
  1065		if (!dev->of_node)
  1066			return;
  1067	
  1068		for_each_child_of_node(dev->of_node, port) {
  1069			const __be32 *prop;
  1070			const char *segment;
  1071			int size, phys;
  1072	
  1073			if (!of_device_is_compatible(port, "swconfig,port"))
  1074				continue;
  1075	
  1076			if (of_property_read_string(port, "swconfig,segment", &segment))
  1077				continue;
  1078	
  1079			prop = of_get_property(port, "swconfig,portmap", &size);
  1080			if (!prop)
  1081				continue;
  1082	
  1083			if (size != (2 * sizeof(*prop))) {
  1084				pr_err("%s: failed to parse port mapping\n",
  1085						port->name);
  1086				continue;
  1087			}
  1088	
  1089			phys = be32_to_cpup(prop++);
  1090			if ((phys < 0) | (phys >= dev->ports)) {
  1091				pr_err("%s: physical port index out of range\n",
  1092						port->name);
  1093				continue;
  1094			}
  1095	
  1096			dev->portmap[phys].s = kstrdup(segment, GFP_KERNEL);
  1097			dev->portmap[phys].virt = be32_to_cpup(prop);
  1098			pr_debug("Found port: %s, physical: %d, virtual: %d\n",
  1099				segment, phys, dev->portmap[phys].virt);
  1100		}
  1101	}
  1102	#endif
  1103	

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