[PATCH v4 1/2] ACPI: Add missing prototype for non CONFIG_SUSPEND/CONFIG_X86 case

Mario Limonciello
2025-04-07T18:37:13Z

From: Mario Limonciello <mario.limonciello@amd.com>

acpi_register_lps0_dev() and acpi_unregister_lps0_dev() may be used
in drivers that don't require CONFIG_SUSPEND or compile on !X86.

Add prototypes for those cases.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202502191627.fRgoBwcZ-lkp@intel.com/
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
---
v3:
* Add struct acpi_s2idle_dev_ops outside defines too
---
include/linux/acpi.h | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 3f2e93ed97301..fc372bbaa5476 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -1125,13 +1125,13 @@ void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state,

acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state,
u32 val_a, u32 val_b);
-#if defined(CONFIG_SUSPEND) && defined(CONFIG_X86)
struct acpi_s2idle_dev_ops {
struct list_head list_node;
void (*prepare)(void);
void (*check)(void);
void (*restore)(void);
};
+#if defined(CONFIG_SUSPEND) && defined(CONFIG_X86)
int acpi_register_lps0_dev(struct acpi_s2idle_dev_ops *arg);
void acpi_unregister_lps0_dev(struct acpi_s2idle_dev_ops *arg);
int acpi_get_lps0_constraint(struct acpi_device *adev);
@@ -1140,6 +1140,13 @@ static inline int acpi_get_lps0_constraint(struct device *dev)
{
return ACPI_STATE_UNKNOWN;
}
+static inline int acpi_register_lps0_dev(struct acpi_s2idle_dev_ops *arg)
+{
+ return -ENODEV;
+}
+static inline void acpi_unregister_lps0_dev(struct acpi_s2idle_dev_ops *arg)
+{
+}
#endif /* CONFIG_SUSPEND && CONFIG_X86 */
void arch_reserve_mem_area(acpi_physical_address addr, size_t size);
#else
--
2.43.0