tree: https://github.com/tobetter/linux odroid-next head: 1d4ca3c9076bf7e6c1f8cd7d70323c19ebbeb2ec commit: a5a3182ec9c00109292e11809ff615a62a3b55aa [73/84] ODROID-COMMON: power:reset: Add odroid support config: arm64-randconfig-r002-20210114 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 6077d55381a6aa3e947ef7abdc36a7515c598c8a) 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 # install arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://github.com/tobetter/linux/commit/a5a3182ec9c00109292e11809ff615a6... git remote add tobetter-linux https://github.com/tobetter/linux git fetch --no-tags tobetter-linux odroid-next git checkout a5a3182ec9c00109292e11809ff615a62a3b55aa # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): void odroid_card_reset(void) ^ drivers/power/reset/odroid-reboot.c:63:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void odroid_card_reset(void) ^ static 1 warning generated. vim +/odroid_card_reset +63 drivers/power/reset/odroid-reboot.c 62 64 { 65 int ret = 0; 66 67 if ((sd_vqsw == 0) && (sd_vmmc == 0)) 68 return; 69 70 if (sd_vqen == 0) { 71 gpio_free(sd_vqsw); 72 gpio_free(sd_vmmc); 73 ret = gpio_request_one(sd_vqsw, 74 GPIOF_OUT_INIT_LOW, "REBOOT"); 75 CHECK_RET(ret); 76 mdelay(10); 77 ret = gpio_direction_output(sd_vqsw, 1); 78 CHECK_RET(ret); 79 ret = gpio_request_one(sd_vmmc, 80 GPIOF_OUT_INIT_LOW, "REBOOT"); 81 CHECK_RET(ret); 82 mdelay(10); 83 ret = gpio_direction_output(sd_vqsw, 0); 84 CHECK_RET(ret); 85 ret = gpio_direction_output(sd_vmmc, 1); 86 CHECK_RET(ret); 87 mdelay(5); 88 gpio_free(sd_vqsw); 89 gpio_free(sd_vmmc); 90 } else { 91 gpio_free(sd_vqsw); 92 gpio_free(sd_vqen); 93 gpio_free(sd_vmmc); 94 95 ret = gpio_request_one(sd_vqsw, 96 GPIOF_OUT_INIT_LOW, "REBOOT"); 97 CHECK_RET(ret); 98 ret = gpio_request_one(sd_vqen, 99 GPIOF_OUT_INIT_LOW, "REBOOT"); 100 CHECK_RET(ret); 101 ret = gpio_request_one(sd_vmmc, 102 GPIOF_OUT_INIT_LOW, "REBOOT"); 103 CHECK_RET(ret); 104 mdelay(100); 105 ret = gpio_direction_input(sd_vqen); 106 CHECK_RET(ret); 107 ret = gpio_direction_input(sd_vmmc); 108 CHECK_RET(ret); 109 ret = gpio_direction_input(sd_vqsw); 110 CHECK_RET(ret); 111 mdelay(5); 112 gpio_free(sd_vqen); 113 gpio_free(sd_vmmc); 114 gpio_free(sd_vqsw); 115 } 116 } 117 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org