linux-kernel - [PATCH v2 2/3] ACPI: processor: Remove unused empty function definition for processor

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Message-ID: <20250905081900.663869-3-lihuisong@huawei.com>
Date: Fri, 5 Sep 2025 16:18:59 +0800
From: Huisong Li <lihuisong@...wei.com>
To: <rafael@...nel.org>, <lenb@...nel.org>
CC: <linux-acpi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linuxarm@...wei.com>, <jonathan.cameron@...wei.com>,
	<zhanjie9@...ilicon.com>, <zhenglifeng1@...wei.com>, <yubowen8@...wei.com>,
	<lihuisong@...wei.com>
Subject: [PATCH v2 2/3] ACPI: processor: Remove unused empty function definition for processor_idle.c

If CONFIG_ACPI_PROCESSOR=n and CONFIG_ACPI_PROCESSOR_IDLE=n, we may encounter
some warnings about function defined but not used.
All external functions of processor_idle.c are just used in processor_driver.c.
And if CONFIG_ACPI_PROCESSOR is selected and CONFIG_ACPI_PROCESSOR_IDLE also
be selected automatically. So remove these empty function definitions.

Signed-off-by: Huisong Li <lihuisong@...wei.com>
---
 include/acpi/processor.h | 22 +---------------------
 1 file changed, 1 insertion(+), 21 deletions(-)

diff --git a/include/acpi/processor.h b/include/acpi/processor.h
index ff864c1cee3a..d6a87dc42a9a 100644
--- a/include/acpi/processor.h
+++ b/include/acpi/processor.h
@@ -417,34 +417,14 @@ static inline void acpi_processor_throttling_init(void) {}
 #endif	/* CONFIG_ACPI_CPU_FREQ_PSS */
 
 /* in processor_idle.c */
-extern struct cpuidle_driver acpi_idle_driver;
 #ifdef CONFIG_ACPI_PROCESSOR_IDLE
+extern struct cpuidle_driver acpi_idle_driver;
 int acpi_processor_power_init(struct acpi_processor *pr);
 int acpi_processor_power_exit(struct acpi_processor *pr);
 int acpi_processor_power_state_has_changed(struct acpi_processor *pr);
 int acpi_processor_hotplug(struct acpi_processor *pr);
 void acpi_processor_register_idle_driver(void);
 void acpi_processor_unregister_idle_driver(void);
-#else
-static inline int acpi_processor_power_init(struct acpi_processor *pr)
-{
-	return -ENODEV;
-}
-
-static inline int acpi_processor_power_exit(struct acpi_processor *pr)
-{
-	return -ENODEV;
-}
-
-static inline int acpi_processor_power_state_has_changed(struct acpi_processor *pr)
-{
-	return -ENODEV;
-}
-
-static inline int acpi_processor_hotplug(struct acpi_processor *pr)
-{
-	return -ENODEV;
-}
 #endif /* CONFIG_ACPI_PROCESSOR_IDLE */
 
 /* in processor_thermal.c */
-- 
2.33.0