[tip: x86/cpu] ACPI/processor_idle: Export acpi_processor_ffh_play_dead()

[tip-bot2 for Artem Bityutskiy]

The following commit has been merged into the x86/cpu branch of tip:

Commit-ID:     64aad4749d7911f8c5e69d93a929a269605dd3cb
Gitweb:        https://git.kernel.org/tip/64aad4749d7911f8c5e69d93a929a269605dd3cb
Author:        Artem Bityutskiy <artem.bityutskiy@xxxxxxxxxxxxxxx>
AuthorDate:    Sun, 16 Feb 2025 14:26:14 +02:00
Committer:     Ingo Molnar <mingo@xxxxxxxxxx>
CommitterDate: Fri, 21 Feb 2025 15:17:07 +01:00

ACPI/processor_idle: Export acpi_processor_ffh_play_dead()

The kernel test robot reported the following build error:

  >> ERROR: modpost: "acpi_processor_ffh_play_dead" [drivers/acpi/processor.ko] undefined!

Caused by this recently merged commit:

  541ddf31e300 ("ACPI/processor_idle: Add FFH state handling")

The build failure is due to an oversight in the 'CONFIG_ACPI_PROCESSOR=m' case,
the function export is missing. Add it.

Reported-by: kernel test robot <lkp@xxxxxxxxx>
Closes: https://lore.kernel.org/oe-kbuild-all/202502151207.FA9UO1iX-lkp@xxxxxxxxx/
Fixes: 541ddf31e300 ("ACPI/processor_idle: Add FFH state handling")
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@xxxxxxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/de5bf4f116779efde315782a15146fdc77a4a044.camel@xxxxxxxxxxxxxxx
---
 arch/x86/kernel/acpi/cstate.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kernel/acpi/cstate.c b/arch/x86/kernel/acpi/cstate.c
index 5bdb655..86c87c0 100644
--- a/arch/x86/kernel/acpi/cstate.c
+++ b/arch/x86/kernel/acpi/cstate.c
@@ -214,6 +214,7 @@ void acpi_processor_ffh_play_dead(struct acpi_processor_cx *cx)
 	percpu_entry = per_cpu_ptr(cpu_cstate_entry, cpu);
 	mwait_play_dead(percpu_entry->states[cx->index].eax);
 }
+EXPORT_SYMBOL_GPL(acpi_processor_ffh_play_dead);
 
 void __cpuidle acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cx)
 {