Hi "Michał, I love your patch! Yet something to improve: [auto build test ERROR on clk/clk-next] [also build test ERROR on robh/for-next abelloni/rtc-next v5.6-rc6 next-20200312] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Micha-Miros-aw/clk-at91-support-... base: https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git clk-next config: arm-at91_dt_defconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 9.2.0 reproduce: 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 GCC_VERSION=9.2.0 make.cross ARCH=arm If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): drivers/clk/at91/at91sam9g45.c: In function 'at91sam9g45_pmc_setup': 118 | at91sam9g45_pmc = pmc_data_allocate(PMC_MAIN + 1, | ^~~~~~~~~~~~~~~~~ In file included from drivers/clk/at91/at91sam9g45.c:8: drivers/clk/at91/pmc.h:100:18: note: declared here 100 | struct pmc_data *pmc_data_allocate(unsigned int ncore, unsigned int nsystem, | ^~~~~~~~~~~~~~~~~ drivers/clk/at91/at91sam9g45.c:213:2: error: implicit declaration of function 'pmc_data_free' [-Werror=implicit-function-declaration] 213 | pmc_data_free(at91sam9g45_pmc); | ^~~~~~~~~~~~~ cc1: some warnings being treated as errors -- drivers/clk/at91/at91sam9n12.c: In function 'at91sam9n12_pmc_setup': 131 | at91sam9n12_pmc = pmc_data_allocate(PMC_MAIN + 1, | ^~~~~~~~~~~~~~~~~ In file included from drivers/clk/at91/at91sam9n12.c:8: drivers/clk/at91/pmc.h:100:18: note: declared here 100 | struct pmc_data *pmc_data_allocate(unsigned int ncore, unsigned int nsystem, | ^~~~~~~~~~~~~~~~~ drivers/clk/at91/at91sam9n12.c:231:2: error: implicit declaration of function 'pmc_data_free' [-Werror=implicit-function-declaration] 231 | pmc_data_free(at91sam9n12_pmc); | ^~~~~~~~~~~~~ cc1: some warnings being treated as errors -- drivers/clk/at91/sam9x60.c: In function 'sam9x60_pmc_setup': 185 | sam9x60_pmc = pmc_data_allocate(PMC_MAIN + 1, | ^~~~~~~~~~~~~~~~~ In file included from drivers/clk/at91/sam9x60.c:8: drivers/clk/at91/pmc.h:100:18: note: declared here 100 | struct pmc_data *pmc_data_allocate(unsigned int ncore, unsigned int nsystem, | ^~~~~~~~~~~~~~~~~ drivers/clk/at91/sam9x60.c:302:2: error: implicit declaration of function 'pmc_data_free' [-Werror=implicit-function-declaration] 302 | pmc_data_free(sam9x60_pmc); | ^~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/pmc_data_allocate +118 drivers/clk/at91/at91sam9g45.c 12dc8d3be9d86c Alexandre Belloni 2020-01-17 92 12dc8d3be9d86c Alexandre Belloni 2020-01-17 93 static void __init at91sam9g45_pmc_setup(struct device_node *np) 12dc8d3be9d86c Alexandre Belloni 2020-01-17 94 { 12dc8d3be9d86c Alexandre Belloni 2020-01-17 95 const char *slck_name, *mainxtal_name; 12dc8d3be9d86c Alexandre Belloni 2020-01-17 96 struct pmc_data *at91sam9g45_pmc; 12dc8d3be9d86c Alexandre Belloni 2020-01-17 97 const char *parent_names[6]; 12dc8d3be9d86c Alexandre Belloni 2020-01-17 98 struct regmap *regmap; 12dc8d3be9d86c Alexandre Belloni 2020-01-17 99 struct clk_hw *hw; 12dc8d3be9d86c Alexandre Belloni 2020-01-17 100 int i; 12dc8d3be9d86c Alexandre Belloni 2020-01-17 101 bool bypass; 12dc8d3be9d86c Alexandre Belloni 2020-01-17 102 12dc8d3be9d86c Alexandre Belloni 2020-01-17 103 i = of_property_match_string(np, "clock-names", "slow_clk"); 12dc8d3be9d86c Alexandre Belloni 2020-01-17 104 if (i < 0) 12dc8d3be9d86c Alexandre Belloni 2020-01-17 105 return; 12dc8d3be9d86c Alexandre Belloni 2020-01-17 106 12dc8d3be9d86c Alexandre Belloni 2020-01-17 107 slck_name = of_clk_get_parent_name(np, i); 12dc8d3be9d86c Alexandre Belloni 2020-01-17 108 12dc8d3be9d86c Alexandre Belloni 2020-01-17 109 i = of_property_match_string(np, "clock-names", "main_xtal"); 12dc8d3be9d86c Alexandre Belloni 2020-01-17 110 if (i < 0) 12dc8d3be9d86c Alexandre Belloni 2020-01-17 111 return; 12dc8d3be9d86c Alexandre Belloni 2020-01-17 112 mainxtal_name = of_clk_get_parent_name(np, i); 12dc8d3be9d86c Alexandre Belloni 2020-01-17 113 12dc8d3be9d86c Alexandre Belloni 2020-01-17 114 regmap = syscon_node_to_regmap(np); 12dc8d3be9d86c Alexandre Belloni 2020-01-17 115 if (IS_ERR(regmap)) 12dc8d3be9d86c Alexandre Belloni 2020-01-17 116 return; 12dc8d3be9d86c Alexandre Belloni 2020-01-17 117 12dc8d3be9d86c Alexandre Belloni 2020-01-17 @118 at91sam9g45_pmc = pmc_data_allocate(PMC_MAIN + 1, :::::: The code at line 118 was first introduced by commit :::::: 12dc8d3be9d86cccc35dcf32828d3a8e9d48e0d1 clk: at91: add at91sam9g45 pmc driver :::::: TO: Alexandre Belloni <alexandre.belloni(a)bootlin.com&gt; :::::: CC: Stephen Boyd <sboyd(a)kernel.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org