# \[pm:bleeding-edge 46/47\] drivers/acpi/processor\_idle.c:546:15: warning: extra tokens at end of \#ifdef directive

- From: kernel test robot \<hidden\>
- Date: 2021-03-30 23:26:17 
- List: linux-pm
- Page: https://ratatoskr.run/linux-pm/2021/03/8984148
- Thread: https://ratatoskr.run/linux-acpi/2021/03/8984148/t.md

```text
tree:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git bleeding-edge
head:   506a524e05e240d2878cf86a56c47e72e09d329f
commit: bc5706eaeae0b51385d3859b0fdf17a2c8fdc134 [46/47] ACPI: processor: Fix CPU0 wakeup in acpi_idle_play_dead()
config: x86_64-randconfig-s022-20210330 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-279-g6d5d9b42-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git/commit/?id=bc5706eaeae0b51385d3859b0fdf17a2c8fdc134
        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 bc5706eaeae0b51385d3859b0fdf17a2c8fdc134
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <redacted>

All warnings (new ones prefixed by >>):

   drivers/acpi/processor_idle.c: In function 'acpi_idle_play_dead':
>> drivers/acpi/processor_idle.c:546:15: warning: extra tokens at end of #ifdef directive
     546 | #ifdef defined(CONFIG_X86) && defined(CONFIG_HOTPLUG_CPU)
         |               ^
   drivers/acpi/processor_idle.c: At top level:
   drivers/acpi/processor_idle.c:1103:12: warning: no previous prototype for 'acpi_processor_ffh_lpi_probe' [-Wmissing-prototypes]
    1103 | int __weak acpi_processor_ffh_lpi_probe(unsigned int cpu)
         |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/acpi/processor_idle.c:1108:12: warning: no previous prototype for 'acpi_processor_ffh_lpi_enter' [-Wmissing-prototypes]
    1108 | int __weak acpi_processor_ffh_lpi_enter(struct acpi_lpi_state *lpi)
         |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for ADI_AXI_ADC
   Depends on IIO && HAS_IOMEM && OF
   Selected by
   - AD9467 && IIO && SPI


vim +546 drivers/acpi/processor_idle.c

   524	
   525	/**
   526	 * acpi_idle_play_dead - enters an ACPI state for long-term idle (i.e. off-lining)
   527	 * @dev: the target CPU
   528	 * @index: the index of suggested state
   529	 */
   530	static int acpi_idle_play_dead(struct cpuidle_device *dev, int index)
   531	{
   532		struct acpi_processor_cx *cx = per_cpu(acpi_cstate[index], dev->cpu);
   533	
   534		ACPI_FLUSH_CPU_CACHE();
   535	
   536		while (1) {
   537	
   538			if (cx->entry_method == ACPI_CSTATE_HALT)
   539				safe_halt();
   540			else if (cx->entry_method == ACPI_CSTATE_SYSTEMIO) {
   541				inb(cx->address);
   542				wait_for_freeze();
   543			} else
   544				return -ENODEV;
   545	
 > 546	#ifdef defined(CONFIG_X86) && defined(CONFIG_HOTPLUG_CPU)
   547			/* If NMI wants to wake up CPU0, start CPU0. */
   548			if (wakeup_cpu0())
   549				start_cpu0();
   550	#endif
   551		}
   552	
   553		/* Never reached */
   554		return 0;
   555	}
   556	

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

## Attachments

- [.config.gz](https://ratatoskr.run/linux-pm/2021/03/8984148/attachment/0) (application/gzip, 34454 bytes)