Hi Florinel,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on net-next/master]

url:    https://github.com/0day-ci/linux/commits/Florinel-Iordache/doc-net-add-backplane-documentation/20200622-223623
base:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 29a720c1042f469c8fea317cb5e7f496b116e07d
config: mips-allyesconfig (attached as .config)
compiler: mips-linux-gcc (GCC) 9.3.0
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
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <redacted>

All warnings (new ones prefixed by >>, old ones prefixed by <<):

quoted

drivers/net/phy/backplane/qoriq_backplane.c:150:18: warning: no previous prototype for 'get_serdes_type' [-Wmissing-prototypes]

150 | enum serdes_type get_serdes_type(struct device_node *serdes_node)
|                  ^~~~~~~~~~~~~~~

vim +/get_serdes_type +150 drivers/net/phy/backplane/qoriq_backplane.c

   149	
 > 150	enum serdes_type get_serdes_type(struct device_node *serdes_node)
   151	{
   152		enum serdes_type serdes = SERDES_INVAL;
   153		const char *serdes_comp;
   154		int comp_no, i, ret;
   155	
   156		comp_no = of_property_count_strings(serdes_node, "compatible");
   157		for (i = 0; i < comp_no; i++) {
   158			ret = of_property_read_string_index(serdes_node, "compatible",
   159							    i, &serdes_comp);
   160			if (ret == 0) {
   161				if (!strcasecmp(serdes_comp, "serdes-10g")) {
   162					serdes = SERDES_10G;
   163					break;
   164				}
   165			}
   166		}
   167	
   168		return serdes;
   169	}
   170	

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