If CONFIG_ACPI_PROCESSOR=n and CONFIG_ACPI_PROCESSOR_IDLE=n, we may encounter some compling warnings as the following link said. So remove these empty function definition because they are just used in processor_driver.c and if CONFIG_ACPI_PROCESSOR is selected and CONFIG_ACPI_PROCESSOR_IDLE also be selected automatically. Reported-by: kernel test robot <lkp@xxxxxxxxx> Closes: https://lore.kernel.org/oe-kbuild-all/202508300519.tZQHY6HA-lkp@xxxxxxxxx/ Signed-off-by: Huisong Li <lihuisong@xxxxxxxxxx> --- include/acpi/processor.h | 34 +++------------------------------- 1 file changed, 3 insertions(+), 31 deletions(-) diff --git a/include/acpi/processor.h b/include/acpi/processor.h index 360b673f05e5..a4e1081fd0da 100644 --- a/include/acpi/processor.h +++ b/include/acpi/processor.h @@ -417,40 +417,17 @@ 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; -} -static inline void acpi_processor_register_idle_driver(void) -{ -} -static inline void acpi_processor_unregister_idle_driver(void) -{ -} +extern int acpi_processor_ffh_lpi_probe(unsigned int cpu); +extern int acpi_processor_ffh_lpi_enter(struct acpi_lpi_state *lpi); #endif /* CONFIG_ACPI_PROCESSOR_IDLE */ /* in processor_thermal.c */ @@ -473,11 +450,6 @@ static inline void acpi_thermal_cpufreq_exit(struct cpufreq_policy *policy) } #endif /* CONFIG_CPU_FREQ */ -#ifdef CONFIG_ACPI_PROCESSOR_IDLE -extern int acpi_processor_ffh_lpi_probe(unsigned int cpu); -extern int acpi_processor_ffh_lpi_enter(struct acpi_lpi_state *lpi); -#endif - void acpi_processor_init_invariance_cppc(void); #endif -- 2.33.0
