tree: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git bleeding-edge head: bbebe3f6011e98d847e4a0841254a9fdae1de703 commit: fef98671194be005853cbbf51b164a3927589b64 [20/21] ACPI: PM: s2idle: Move x86-specific code to the x86 directory config: i386-allyesconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git/commi... git remote add pm https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git git fetch --no-tags pm bleeding-edge git checkout fef98671194be005853cbbf51b164a3927589b64 # save the attached .config to linux build tree make W=1 ARCH=i386 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 >>): drivers/acpi/x86/s2idle.c: In function 'lpi_device_get_constraints_amd': 138 | union acpi_object *obj_new; | ^~~~~~~ 108 | struct lpi_device_info_amd info = { }; | ^~~~ vim +/obj_new +138 drivers/acpi/x86/s2idle.c 90 91 static void lpi_device_get_constraints_amd(void) 92 { 93 union acpi_object *out_obj; 94 int i, j, k; 95 96 out_obj = acpi_evaluate_dsm_typed(lps0_device_handle, &lps0_dsm_guid, 97 1, ACPI_LPS0_GET_DEVICE_CONSTRAINTS, 98 NULL, ACPI_TYPE_PACKAGE); 99 100 if (!out_obj) 101 return; 102 103 acpi_handle_debug(lps0_device_handle, "_DSM function 1 eval %s\n", 104 out_obj ? "successful" : "failed"); 105 106 for (i = 0; i < out_obj->package.count; i++) { 107 union acpi_object *package = &out_obj->package.elements[i]; 109 110 if (package->type == ACPI_TYPE_INTEGER) { 111 switch (i) { 112 case 0: 113 info.revision = package->integer.value; 114 break; 115 case 1: 116 info.count = package->integer.value; 117 break; 118 } 119 } else if (package->type == ACPI_TYPE_PACKAGE) { 120 lpi_constraints_table = kcalloc(package->package.count, 121 sizeof(*lpi_constraints_table), 122 GFP_KERNEL); 123 124 if (!lpi_constraints_table) 125 goto free_acpi_buffer; 126 127 acpi_handle_debug(lps0_device_handle, 128 "LPI: constraints list begin:\n"); 129 130 for (j = 0; j < package->package.count; ++j) { 131 union acpi_object *info_obj = &package->package.elements[j]; 132 struct lpi_device_constraint_amd dev_info = {}; 133 struct lpi_constraints *list; 134 acpi_status status; 135 136 for (k = 0; k < info_obj->package.count; ++k) { 137 union acpi_object *obj = &info_obj->package.elements[k]; 139 140 list = &lpi_constraints_table[lpi_constraints_table_size]; 141 list->min_dstate = -1; 142 143 obj_new = &obj[k]; 144 switch (k) { 145 case 0: 146 dev_info.enabled = obj->integer.value; 147 break; 148 case 1: 149 dev_info.name = obj->string.pointer; 150 break; 151 case 2: 152 dev_info.function_states = obj->integer.value; 153 break; 154 case 3: 155 dev_info.min_dstate = obj->integer.value; 156 break; 157 } 158 159 if (!dev_info.enabled || !dev_info.name || 160 !dev_info.min_dstate) 161 continue; 162 163 status = acpi_get_handle(NULL, dev_info.name, 164 &list->handle); 165 if (ACPI_FAILURE(status)) 166 continue; 167 168 acpi_handle_debug(lps0_device_handle, 169 "Name:%s\n", dev_info.name); 170 171 list->min_dstate = dev_info.min_dstate; 172 173 if (list->min_dstate < 0) { 174 acpi_handle_debug(lps0_device_handle, 175 "Incomplete constraint defined\n"); 176 continue; 177 } 178 } 179 lpi_constraints_table_size++; 180 } 181 } 182 } 183 184 acpi_handle_debug(lps0_device_handle, "LPI: constraints list end\n"); 185 186 free_acpi_buffer: 187 ACPI_FREE(out_obj); 188 } 189 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org