linux-kernel - [PATCH v2 1/3] ACPI: processor: Fix function defined but not used warning

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Message-ID: <20250905081900.663869-2-lihuisong@huawei.com>
Date: Fri, 5 Sep 2025 16:18:58 +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 1/3] ACPI: processor: Fix function defined but not used warning

If CONFIG_ACPI_PROCESSOR=n and CONFIG_ACPI_PROCESSOR_IDLE=n, we may
encounter some compling warnings as the following link said.
The acpi_processor_register/unregister_idle_driver() would not be
used when CONFIG_ACPI_PROCESSOR_IDLE is n. So remove these empty
function definition.

Reported-by: kernel test robot <lkp@...el.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202508300519.tZQHY6HA-lkp@intel.com/
Fixes: 7a8c994cbb2d ("ACPI: processor: idle: Optimize ACPI idle driver registration")
Signed-off-by: Huisong Li <lihuisong@...wei.com>
---
 include/acpi/processor.h | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/include/acpi/processor.h b/include/acpi/processor.h
index 360b673f05e5..ff864c1cee3a 100644
--- a/include/acpi/processor.h
+++ b/include/acpi/processor.h
@@ -445,12 +445,6 @@ static inline int acpi_processor_hotplug(struct acpi_processor *pr)
 {
 	return -ENODEV;
 }
-static inline void acpi_processor_register_idle_driver(void)
-{
-}
-static inline void acpi_processor_unregister_idle_driver(void)
-{
-}
 #endif /* CONFIG_ACPI_PROCESSOR_IDLE */
 
 /* in processor_thermal.c */
-- 
2.33.0