[litex-hub:litex-rebase 7/15] drivers/i2c/busses/i2c-litex.c:119:9: error: implicit declaration of function 'strncpy'

[litex-hub:litex-rebase 7/15] drivers/i2c/busses/i2c-litex.c:119:9: error: implicit declaration of function 'strncpy'

[kernel test robot]

tree:   https://github.com/litex-hub/linux litex-rebase
head:   c13bee0670f8bcfe9e289c42a42a551462e8c5df
commit: 0feffc97be8ca96055d732a53f8946c9eccb3527 [7/15] LiteX: driver for I2CMaster
config: sh-allmodconfig (https://download.01.org/0day-ci/archive/20260623/202606231855.ipMEmMUU-lkp@intel.com/config)
compiler: sh4-linux-gcc (GCC) 16.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260623/202606231855.ipMEmMUU-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/202606231855.ipMEmMUU-lkp@intel.com/

All errors (new ones prefixed by >>):

   drivers/i2c/busses/i2c-litex.c: In function 'litex_i2c_probe':
>> drivers/i2c/busses/i2c-litex.c:119:9: error: implicit declaration of function 'strncpy' [-Wimplicit-function-declaration]
     119 |         strncpy(i2c_s->adapter.name, "litex_i2c_adapter",
         |         ^~~~~~~
   drivers/i2c/busses/i2c-litex.c:26:1: note: 'strncpy' is defined in header '<string.h>'; this is probably fixable by adding '#include <string.h>'
      25 | #include <linux/litex.h>
     +++ |+#include <string.h>
      26 | 


vim +/strncpy +119 drivers/i2c/busses/i2c-litex.c

    93	
    94	static int litex_i2c_probe(struct platform_device *pdev)
    95	{
    96		struct device_node *node = pdev->dev.of_node;
    97		void __iomem *membase;
    98		struct litex_i2c *i2c_s;
    99		struct resource *res;
   100	
   101		if (!node)
   102			return -ENODEV;
   103	
   104		i2c_s = devm_kzalloc(&pdev->dev, sizeof(*i2c_s), GFP_KERNEL);
   105		if (!i2c_s)
   106			return -ENOMEM;
   107	
   108		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
   109		if (!res)
   110			return -EBUSY;
   111	
   112		membase = devm_of_iomap(&pdev->dev, node, 0, &res->end);
   113		if (IS_ERR_OR_NULL(membase))
   114			return -EIO;
   115	
   116		i2c_s->reg_w = membase + OFFSET_REG_W;
   117		i2c_s->reg_r = membase + OFFSET_REG_R;
   118	
 > 119		strncpy(i2c_s->adapter.name, "litex_i2c_adapter",
   120			sizeof(i2c_s->adapter.name));
   121		i2c_s->adapter.owner        = THIS_MODULE;
   122		i2c_s->adapter.algo_data    = &i2c_s->algo_data;
   123		i2c_s->adapter.dev.parent   = &pdev->dev;
   124		i2c_s->adapter.dev.of_node  = node;
   125		i2c_s->algo_data.data       = i2c_s;
   126	
   127		i2c_s->algo_data.setsda  = litex_i2c_setsda;
   128		i2c_s->algo_data.setscl  = litex_i2c_setscl;
   129		i2c_s->algo_data.getsda  = litex_i2c_getsda;
   130		i2c_s->algo_data.getscl  = NULL;
   131		i2c_s->algo_data.udelay  = DRIVER_ALGO_BIT_UDELAY;
   132		i2c_s->algo_data.timeout = HZ;
   133	
   134		platform_set_drvdata(pdev, i2c_s);
   135		return i2c_bit_add_bus(&i2c_s->adapter);
   136	}
   137	

--
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https://github.com/intel/lkp-tests/wiki