Hi Russell,

kernel test robot noticed the following build errors:

[auto build test ERROR on net-next/main]

url:    https://github.com/intel-lab-lkp/linux/commits/Russell-King-Oracle/net-stmmac-mdio-use-same-test-for-MDC-clock-divisor-lookups/20260304-183416
base:   net-next/main
patch link:    https://lore.kernel.org/r/E1vxjNj-0000000Br1c-2Fg7%40rmk-PC.armlinux.org.uk
patch subject: [PATCH net-next 8/8] net: stmmac: make pcs_mask and phy_mask u32
config: sparc64-allmodconfig (https://download.01.org/0day-ci/archive/20260305/202603050424.TDlVj9FT-lkp@intel.com/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project 9a109fbb6e184ec9bcce10615949f598f4c974a9)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260305/202603050424.TDlVj9FT-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 [off-list ref]
| Closes: https://lore.kernel.org/oe-kbuild-all/202603050424.TDlVj9FT-lkp@intel.com/ (local)

All errors (new ones prefixed by >>):

quoted

drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c:171:35: error: call to undeclared function 'BIT_u32'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]

     171 |         plat->mdio_bus_data->phy_mask = ~BIT_u32(2);
         |                                          ^
   1 error generated.


vim +/BIT_u32 +171 drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c

   164	
   165	static int loongson_gnet_data(struct pci_dev *pdev,
   166				      struct plat_stmmacenet_data *plat)
   167	{
   168		loongson_default_data(pdev, plat);
   169	
   170		plat->phy_interface = PHY_INTERFACE_MODE_GMII;
 > 171		plat->mdio_bus_data->phy_mask = ~BIT_u32(2);
   172		plat->fix_mac_speed = loongson_gnet_fix_speed;
   173	
   174		return 0;
   175	}
   176	

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