[PATCH RFC v4 04/15] ACPI: Rename acpi_processor_hotadd_init and remove pre-processor guards
From: Russell King (Oracle) <hidden>
Date: 2024-01-31 16:50:10
Also in:
kvmarm, linux-acpi, linux-arch, linux-doc, linux-pm, linux-riscv, lkml, loongarch
Subsystem:
acpi, the rest · Maintainers:
"Rafael J. Wysocki", Linus Torvalds
From: James Morse <james.morse@arm.com> acpi_processor_hotadd_init() will make a CPU present by mapping it based on its hardware id. 'hotadd_init' is ambiguous once there are two different behaviours for cpu hotplug. This is for toggling the _STA present bit. Subsequent patches will add support for toggling the _STA enabled bit, named acpi_processor_make_enabled(). Rename it acpi_processor_make_present() to make it clear this is for CPUs that were not previously present. Expose the function prototypes it uses to allow the preprocessor guards to be removed. The IS_ENABLED() check will let the compiler dead-code elimination pass remove this if it isn't going to be used. Signed-off-by: James Morse <james.morse@arm.com> Tested-by: Miguel Luis <redacted> Tested-by: Vishnu Pajjuri <redacted> Tested-by: Jianyong Wu <redacted> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Russell King (Oracle) <redacted> --- drivers/acpi/acpi_processor.c | 14 +++++--------- include/linux/acpi.h | 2 -- 2 files changed, 5 insertions(+), 11 deletions(-)
diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c
index a68c475cdea5..fd8f3a0572cb 100644
--- a/drivers/acpi/acpi_processor.c
+++ b/drivers/acpi/acpi_processor.c@@ -183,13 +183,15 @@ static void __init acpi_pcc_cpufreq_init(void) {} #endif /* CONFIG_X86 */ /* Initialization */ -#ifdef CONFIG_ACPI_HOTPLUG_CPU -static int acpi_processor_hotadd_init(struct acpi_processor *pr) +static int acpi_processor_make_present(struct acpi_processor *pr) { unsigned long long sta; acpi_status status; int ret; + if (!IS_ENABLED(CONFIG_ACPI_HOTPLUG_CPU)) + return -ENODEV; + if (invalid_phys_cpuid(pr->phys_id)) return -ENODEV;
@@ -223,12 +225,6 @@ static int acpi_processor_hotadd_init(struct acpi_processor *pr) cpu_maps_update_done(); return ret; } -#else -static inline int acpi_processor_hotadd_init(struct acpi_processor *pr) -{ - return -ENODEV; -} -#endif /* CONFIG_ACPI_HOTPLUG_CPU */ static int acpi_processor_get_info(struct acpi_device *device) {
@@ -335,7 +331,7 @@ static int acpi_processor_get_info(struct acpi_device *device) * because cpuid <-> apicid mapping is persistent now. */ if (invalid_logical_cpuid(pr->id) || !cpu_present(pr->id)) { - int ret = acpi_processor_hotadd_init(pr); + int ret = acpi_processor_make_present(pr); if (ret) return ret;
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index b7165e52b3c6..76ad43f7860b 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h@@ -302,12 +302,10 @@ static inline int acpi_processor_evaluate_cst(acpi_handle handle, u32 cpu, } #endif -#ifdef CONFIG_ACPI_HOTPLUG_CPU /* Arch dependent functions for cpu hotplug support */ int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, int *pcpu); int acpi_unmap_cpu(int cpu); -#endif /* CONFIG_ACPI_HOTPLUG_CPU */ #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC int acpi_get_ioapic_id(acpi_handle handle, u32 gsi_base, u64 *phys_addr);
--
2.30.2
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