ACPI: processor_perflib: extend X86 dependency

The majority of the processor_perflib code is only used by cpufreq
drivers on the x86 architecture and makes no sense without the
x86 SMI interactions that rely on I/O port access.

Replace the existing #ifdef checks with one that covers all of the
code that is only used by x86 drivers, saving a little bit
of kernel code size on other architectures.

There is likely more code under CONFIG_ACPI_PROCESSOR that falls
into this category, but changing those would require a larger
rework.

Suggested-by: Rafael J. Wysocki <rafael@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://patch.msgid.link/20241030123701.1538919-1-arnd@kernel.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
index 4265814c74f81aded00495856ae83cc9746b5979..53996f1a2d80e94594633363478a42c9c53d89fb 100644 (file)
--- a/drivers/acpi/processor_perflib.c
+++ b/drivers/acpi/processor_perflib.c
@@ -24,8 +24,6 @@
 
 #define ACPI_PROCESSOR_FILE_PERFORMANCE        "performance"
 
-static DEFINE_MUTEX(performance_mutex);
-
 /*
  * _PPC support is implemented as a CPUfreq policy notifier:
  * This means each time a CPUfreq driver registered also with
@@ -209,6 +207,10 @@ void acpi_processor_ppc_exit(struct cpufreq_policy *policy)
        }
 }
 
+#ifdef CONFIG_X86
+
+static DEFINE_MUTEX(performance_mutex);
+
 static int acpi_processor_get_performance_control(struct acpi_processor *pr)
 {
        int result = 0;
@@ -267,7 +269,6 @@ end:
        return result;
 }
 
-#ifdef CONFIG_X86
 /*
  * Some AMDs have 50MHz frequency multiples, but only provide 100MHz rounding
  * in their ACPI data. Calculate the real values and fix up the _PSS data.
@@ -298,9 +299,6 @@ static void amd_fixup_frequency(struct acpi_processor_px *px, int i)
                        px->core_frequency = (100 * (fid + 8)) >> did;
        }
 }
-#else
-static void amd_fixup_frequency(struct acpi_processor_px *px, int i) {};
-#endif
 
 static int acpi_processor_get_performance_states(struct acpi_processor *pr)
 {
@@ -440,13 +438,11 @@ int acpi_processor_get_performance_info(struct acpi_processor *pr)
         * the BIOS is older than the CPU and does not know its frequencies
         */
  update_bios:
-#ifdef CONFIG_X86
        if (acpi_has_method(pr->handle, "_PPC")) {
                if(boot_cpu_has(X86_FEATURE_EST))
                        pr_warn(FW_BUG "BIOS needs update for CPU "
                               "frequency support\n");
        }
-#endif
        return result;
 }
 EXPORT_SYMBOL_GPL(acpi_processor_get_performance_info);
@@ -788,3 +784,4 @@ unlock:
        mutex_unlock(&performance_mutex);
 }
 EXPORT_SYMBOL(acpi_processor_unregister_performance);
+#endif