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 <redacted>
All errors (new ones prefixed by >>):
drivers/acpi/processor_idle.c: In function 'acpi_idle_play_dead':quoted
drivers/acpi/processor_idle.c:548:7: error: implicit declaration of function 'wakeup_cpu0' [-Werror=implicit-function-declaration]
548 | if (wakeup_cpu0())
| ^~~~~~~~~~~quoted
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