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| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2021-04-06 17:56:40 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2021-04-07 19:02:43 +0200 |
| commit | fa26d0c778b432d3d9814ea82552e813b33eeb5c (patch) | |
| tree | 39348f87174de17b37f636b285fc208dd5100516 /drivers/acpi/processor_idle.c | |
| parent | e49d033bddf5b565044e2abe4241353959bc9120 (diff) | |
| download | linux-fa26d0c778b432d3d9814ea82552e813b33eeb5c.tar.bz2 | |
ACPI: processor: Fix build when CONFIG_ACPI_PROCESSOR=m
Commit 8cdddd182bd7 ("ACPI: processor: Fix CPU0 wakeup in
acpi_idle_play_dead()") tried to fix CPU0 hotplug breakage by copying
wakeup_cpu0() + start_cpu0() logic from hlt_play_dead()//mwait_play_dead()
into acpi_idle_play_dead(). The problem is that these functions are not
exported to modules so when CONFIG_ACPI_PROCESSOR=m build fails.
The issue could've been fixed by exporting both wakeup_cpu0()/start_cpu0()
(the later from assembly) but it seems putting the whole pattern into a
new function and exporting it instead is better.
Reported-by: kernel test robot <lkp@intel.com>
Fixes: 8cdddd182bd7 ("CPI: processor: Fix CPU0 wakeup in acpi_idle_play_dead()")
Cc: <stable@vger.kernel.org> # 5.10+
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/processor_idle.c')
| -rw-r--r-- | drivers/acpi/processor_idle.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c index 768a6b4d2368..4e2d76b8b697 100644 --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -544,9 +544,7 @@ static int acpi_idle_play_dead(struct cpuidle_device *dev, int index) return -ENODEV; #if defined(CONFIG_X86) && defined(CONFIG_HOTPLUG_CPU) - /* If NMI wants to wake up CPU0, start CPU0. */ - if (wakeup_cpu0()) - start_cpu0(); + cond_wakeup_cpu0(); #endif } |