[pm:bleeding-edge 47/48] drivers/acpi/processor_idle.c:548:7: error: implicit declaration of function 'wakeup_cpu0'

From: kernel test robot <lkp@intel.com>
To: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: kbuild-all@lists.01.org, linux-acpi@vger.kernel.org,
	devel@acpica.org, linux-pm@vger.kernel.org,
	"Rafael J. Wysocki" <rjw@rjwysocki.net>
Subject: [pm:bleeding-edge 47/48] drivers/acpi/processor_idle.c:548:7: error: implicit declaration of function 'wakeup_cpu0'
Date: Tue, 30 Mar 2021 05:45:20 +0800	[thread overview]
Message-ID: <202103300514.cNhP3ar5-lkp@intel.com> (raw)

[-- Attachment #1: Type: text/plain, Size: 3137 bytes --]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git bleeding-edge
head:   a70fdf61936ab0200d31bebea4b44bb67454ce07
commit: 5f5e49e999acd8556e694e841d63226d21e409d9 [47/48] ACPI: processor: Fix CPU0 wakeup in acpi_idle_play_dead()
config: i386-randconfig-a014-20210329 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git/commit/?id=5f5e49e999acd8556e694e841d63226d21e409d9
        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 5f5e49e999acd8556e694e841d63226d21e409d9
        # 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@intel.com>

All errors (new ones prefixed by >>):

   drivers/acpi/processor_idle.c: In function 'acpi_idle_play_dead':
>> drivers/acpi/processor_idle.c:548:7: error: implicit declaration of function 'wakeup_cpu0' [-Werror=implicit-function-declaration]
     548 |   if (wakeup_cpu0())
         |       ^~~~~~~~~~~
>> drivers/acpi/processor_idle.c:549:4: error: implicit declaration of function 'start_cpu0'; did you mean 'task_cpu'? [-Werror=implicit-function-declaration]
     549 |    start_cpu0();
         |    ^~~~~~~~~~
         |    task_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)
         |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/wakeup_cpu0 +548 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 CONFIG_X86
   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

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 31921 bytes --]