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SubjectRe: [PATCH] ACPICA: Check whether ACPI is disabled before getting a table
Hi Borislav,

[auto build test ERROR on pm/linux-next]
[also build test ERROR on v4.13-rc7 next-20170901]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Borislav-Petkov/ACPICA-Check-whether-ACPI-is-disabled-before-getting-a-table/20170823-041359
base: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
config: arm64-defconfig (attached as .config)
compiler: aarch64-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
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
make.cross ARCH=arm64

All errors (new ones prefixed by >>):

drivers/acpi/acpica/tbxface.c: In function 'acpi_get_table_header':
>> drivers/acpi/acpica/tbxface.c:254:6: error: 'acpi_disabled' undeclared (first use in this function)
if (acpi_disabled)
^~~~~~~~~~~~~
drivers/acpi/acpica/tbxface.c:254:6: note: each undeclared identifier is reported only once for each function it appears in

vim +/acpi_disabled +254 drivers/acpi/acpica/tbxface.c

229
230 /*******************************************************************************
231 *
232 * FUNCTION: acpi_get_table_header
233 *
234 * PARAMETERS: signature - ACPI signature of needed table
235 * instance - Which instance (for SSDTs)
236 * out_table_header - The pointer to the table header to fill
237 *
238 * RETURN: Status and pointer to mapped table header
239 *
240 * DESCRIPTION: Finds an ACPI table header.
241 *
242 * NOTE: Caller is responsible in unmapping the header with
243 * acpi_os_unmap_memory
244 *
245 ******************************************************************************/
246 acpi_status
247 acpi_get_table_header(char *signature,
248 u32 instance, struct acpi_table_header *out_table_header)
249 {
250 u32 i;
251 u32 j;
252 struct acpi_table_header *header;
253
> 254 if (acpi_disabled)
255 return (AE_ERROR);
256
257 /* Parameter validation */
258
259 if (!signature || !out_table_header) {
260 return (AE_BAD_PARAMETER);
261 }
262
263 /* Walk the root table list */
264
265 for (i = 0, j = 0; i < acpi_gbl_root_table_list.current_table_count;
266 i++) {
267 if (!ACPI_COMPARE_NAME
268 (&(acpi_gbl_root_table_list.tables[i].signature),
269 signature)) {
270 continue;
271 }
272
273 if (++j < instance) {
274 continue;
275 }
276
277 if (!acpi_gbl_root_table_list.tables[i].pointer) {
278 if ((acpi_gbl_root_table_list.tables[i].flags &
279 ACPI_TABLE_ORIGIN_MASK) ==
280 ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL) {
281 header =
282 acpi_os_map_memory(acpi_gbl_root_table_list.
283 tables[i].address,
284 sizeof(struct
285 acpi_table_header));
286 if (!header) {
287 return (AE_NO_MEMORY);
288 }
289
290 memcpy(out_table_header, header,
291 sizeof(struct acpi_table_header));
292 acpi_os_unmap_memory(header,
293 sizeof(struct
294 acpi_table_header));
295 } else {
296 return (AE_NOT_FOUND);
297 }
298 } else {
299 memcpy(out_table_header,
300 acpi_gbl_root_table_list.tables[i].pointer,
301 sizeof(struct acpi_table_header));
302 }
303 return (AE_OK);
304 }
305
306 return (AE_NOT_FOUND);
307 }
308

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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