From: Thomas Renninger <trenn@xxxxxxx>
enabled with CPU_FREQ_DEBUG
Signed-off-by: Thomas Renninger <trenn@xxxxxxx>
Signed-off-by: Len Brown <len.brown@xxxxxxxxx>
---
drivers/acpi/processor_perflib.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
index f32010b..b477a4b 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;
--
1.5.4.34.g053d9
-
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