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@xxxxxxx>
---
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 682721594820..6ab55f109417 100644
--- a/drivers/acpi/acpi_processor.c
+++ b/drivers/acpi/acpi_processor.c
@@ -149,13 +149,15 @@ static int acpi_processor_errata(void)
}
/* Initialization */
-#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_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_PRESENT_CPU))
+ return -ENODEV;
+
if (invalid_phys_cpuid(pr->phys_id))
return -ENODEV;
@@ -189,12 +191,6 @@ 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_PRESENT_CPU */
static int acpi_processor_get_info(struct acpi_device *device)
{
@@ -287,7 +283,7 @@ 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 0bc1eacd0dfc..a59bca4dbcd5 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -327,12 +327,10 @@ static inline int acpi_processor_evaluate_cst(acpi_handle handle, u32 cpu,
}
#endif
-#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_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_PRESENT_CPU */
#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
int acpi_get_ioapic_id(acpi_handle handle, u32 gsi_base, u64 *phys_addr);
--
2.30.2
|