tree: https://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux.git smccc_v1_2_soc_id head: e5d38d7d28222b9a997e1ec7521493b87d302389 commit: e5d38d7d28222b9a997e1ec7521493b87d302389 [7/7] firmware: smccc: Add ARCH_SOC_ID support config: arm64-randconfig-r003-20200515 (attached as .config) compiler: aarch64-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout e5d38d7d28222b9a997e1ec7521493b87d302389 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day GCC_VERSION=9.3.0 make.cross ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): In file included from include/linux/export.h:43, from include/linux/linkage.h:7, from include/linux/arm-smccc.h:90, from drivers/firmware/smccc/soc_id.c:8: drivers/firmware/smccc/soc_id.c: In function 'smccc_soc_init': drivers/firmware/smccc/soc_id.c:96:6: error: implicit declaration of function 'arm_smccc_version_get' [-Werror=implicit-function-declaration] 96 | if (arm_smccc_version_get() < ARM_SMCCC_VERSION_1_2) | ^~~~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:58:52: note: in definition of macro '__trace_if_var' 58 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) | ^~~~ 96 | if (arm_smccc_version_get() < ARM_SMCCC_VERSION_1_2) | ^~ cc1: some warnings being treated as errors vim +/if +96 drivers/firmware/smccc/soc_id.c 88 89 static int __init smccc_soc_init(void) 90 { 91 struct device *dev; 92 int ret, soc_id_rev; 93 struct arm_smccc_res res; 94 static char soc_id_str[8], soc_id_rev_str[12]; 95 97 return 0; 98 99 ret = smccc_soc_id_support_check(); 100 if (ret) { 101 pr_info("Feature not implemented, skipping ....\n"); 102 return 0; 103 } 104 105 arm_smccc_1_1_invoke(ARM_SMCCC_ARCH_SOC_ID, 0, &res); 106 107 ret = smccc_map_error_codes(res.a0); 108 if (ret) { 109 pr_err("Failed to fetch version, Err = %d\n", ret); 110 return ret; 111 } 112 113 soc_id_version = res.a0; 114 115 arm_smccc_1_1_invoke(ARM_SMCCC_ARCH_SOC_ID, 1, &res); 116 117 ret = smccc_map_error_codes(res.a0); 118 if (ret) { 119 pr_err("Failed to fetch revision, Err = %d\n", ret); 120 return ret; 121 } 122 123 soc_id_rev = res.a0; 124 125 soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); 126 if (!soc_dev_attr) 127 return -ENOMEM; 128 129 sprintf(soc_id_str, "0x%04x", IMP_DEF_SOC_ID(soc_id_version)); 130 sprintf(soc_id_rev_str, "0x%08x", soc_id_rev); 131 132 soc_dev_attr->soc_id = soc_id_str; 133 soc_dev_attr->revision = soc_id_rev_str; 134 135 soc_dev = soc_device_register(soc_dev_attr); 136 if (IS_ERR(soc_dev)) { 137 ret = PTR_ERR(soc_dev); 138 goto free_soc; 139 } 140 141 dev = soc_device_to_device(soc_dev); 142 143 ret = devm_device_add_groups(dev, jep106_id_groups); 144 if (ret) { 145 dev_err(dev, "sysfs create failed: %d\n", ret); 146 goto unregister_soc; 147 } 148 149 pr_info("ID = %s Revision = %s\n", soc_dev_attr->soc_id, 150 soc_dev_attr->revision); 151 152 return 0; 153 154 unregister_soc: 155 soc_device_unregister(soc_dev); 156 free_soc: 157 kfree(soc_dev_attr); 158 return ret; 159 } 160 module_init(smccc_soc_init); 161 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org