ACPI: cpufreq: Print _PPC changes via cpufreq debug layer

enabled with CPU_FREQ_DEBUG

Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
index f32010bee4d5..b477a4be8a69 100644
--- a/drivers/acpi/processor_perflib.c
+++ b/drivers/acpi/processor_perflib.c
@@ -50,6 +50,10 @@ ACPI_MODULE_NAME("processor_perflib");
 
 static DEFINE_MUTEX(performance_mutex);
 
+/* Use cpufreq debug layer for _PPC changes. */
+#define cpufreq_printk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_CORE, \
+                                                "cpufreq-core", msg)
+
 /*
  * _PPC support is implemented as a CPUfreq policy notifier:
  * This means each time a CPUfreq driver registered also with
@@ -131,6 +135,9 @@ static int acpi_processor_get_platform_limit(struct acpi_processor *pr)
                 return -ENODEV;
         }
 
+        cpufreq_printk("CPU %d: _PPC is %d - frequency %s limited\n", pr->id,
+                       (int)ppc, ppc ? "" : "not");
+
         pr->performance_platform_limit = (int)ppc;
 
         return 0;