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SubjectRe: [PATCH] ACPI: scan: Turn off unused power resources during initialization
Hi "Rafael,

I love your patch! Yet something to improve:

[auto build test ERROR on pm/linux-next]
[also build test ERROR on linux/master linus/master v5.12-rc3 next-20210317]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url: https://github.com/0day-ci/linux/commits/Rafael-J-Wysocki/ACPI-scan-Turn-off-unused-power-resources-during-initialization/20210318-005323
base: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
config: x86_64-randconfig-c022-20210317 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
# https://github.com/0day-ci/linux/commit/2462e52396b65921f0c83dfe19d5fcd9927d3498
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Rafael-J-Wysocki/ACPI-scan-Turn-off-unused-power-resources-during-initialization/20210318-005323
git checkout 2462e52396b65921f0c83dfe19d5fcd9927d3498
# save the attached .config to linux build tree
make W=1 ARCH=x86_64

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

ld: drivers/acpi/scan.o: in function `acpi_scan_init':
>> drivers/acpi/scan.c:2363: undefined reference to `acpi_turn_off_unused_power_resources'


vim +2363 drivers/acpi/scan.c

2290
2291 int __init acpi_scan_init(void)
2292 {
2293 int result;
2294 acpi_status status;
2295 struct acpi_table_stao *stao_ptr;
2296
2297 acpi_pci_root_init();
2298 acpi_pci_link_init();
2299 acpi_processor_init();
2300 acpi_platform_init();
2301 acpi_lpss_init();
2302 acpi_apd_init();
2303 acpi_cmos_rtc_init();
2304 acpi_container_init();
2305 acpi_memory_hotplug_init();
2306 acpi_watchdog_init();
2307 acpi_pnp_init();
2308 acpi_int340x_thermal_init();
2309 acpi_amba_init();
2310 acpi_init_lpit();
2311
2312 acpi_scan_add_handler(&generic_device_handler);
2313
2314 /*
2315 * If there is STAO table, check whether it needs to ignore the UART
2316 * device in SPCR table.
2317 */
2318 status = acpi_get_table(ACPI_SIG_STAO, 0,
2319 (struct acpi_table_header **)&stao_ptr);
2320 if (ACPI_SUCCESS(status)) {
2321 if (stao_ptr->header.length > sizeof(struct acpi_table_stao))
2322 pr_info(PREFIX "STAO Name List not yet supported.\n");
2323
2324 if (stao_ptr->ignore_uart)
2325 acpi_get_spcr_uart_addr();
2326
2327 acpi_put_table((struct acpi_table_header *)stao_ptr);
2328 }
2329
2330 acpi_gpe_apply_masked_gpes();
2331 acpi_update_all_gpes();
2332
2333 /*
2334 * Although we call __add_memory() that is documented to require the
2335 * device_hotplug_lock, it is not necessary here because this is an
2336 * early code when userspace or any other code path cannot trigger
2337 * hotplug/hotunplug operations.
2338 */
2339 mutex_lock(&acpi_scan_lock);
2340 /*
2341 * Enumerate devices in the ACPI namespace.
2342 */
2343 result = acpi_bus_scan(ACPI_ROOT_OBJECT);
2344 if (result)
2345 goto out;
2346
2347 result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root);
2348 if (result)
2349 goto out;
2350
2351 /* Fixed feature devices do not exist on HW-reduced platform */
2352 if (!acpi_gbl_reduced_hardware) {
2353 result = acpi_bus_scan_fixed();
2354 if (result) {
2355 acpi_detach_data(acpi_root->handle,
2356 acpi_scan_drop_device);
2357 acpi_device_del(acpi_root);
2358 put_device(&acpi_root->dev);
2359 goto out;
2360 }
2361 }
2362
> 2363 acpi_turn_off_unused_power_resources();
2364
2365 acpi_scan_initialized = true;
2366
2367 out:
2368 mutex_unlock(&acpi_scan_lock);
2369 return result;
2370 }
2371

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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