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-rw-r--r--drivers/acpi/processor_perflib.c23
1 files changed, 12 insertions, 11 deletions
diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
index abbdb37a7f5..7c6f97e9c72 100644
--- a/drivers/acpi/processor_perflib.c
+++ b/drivers/acpi/processor_perflib.c
@@ -34,6 +34,7 @@
#ifdef CONFIG_X86_ACPI_CPUFREQ_PROC_INTF
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
+#include <linux/mutex.h>
#include <asm/uaccess.h>
#endif
@@ -48,7 +49,7 @@
#define _COMPONENT ACPI_PROCESSOR_COMPONENT
ACPI_MODULE_NAME("acpi_processor")
-static DECLARE_MUTEX(performance_sem);
+static DEFINE_MUTEX(performance_mutex);
/*
* _PPC support is implemented as a CPUfreq policy notifier:
@@ -72,7 +73,7 @@ static int acpi_processor_ppc_notifier(struct notifier_block *nb,
struct acpi_processor *pr;
unsigned int ppc = 0;
- down(&performance_sem);
+ mutex_lock(&performance_mutex);
if (event != CPUFREQ_INCOMPATIBLE)
goto out;
@@ -93,7 +94,7 @@ static int acpi_processor_ppc_notifier(struct notifier_block *nb,
core_frequency * 1000);
out:
- up(&performance_sem);
+ mutex_unlock(&performance_mutex);
return 0;
}
@@ -564,16 +565,16 @@ acpi_processor_register_performance(struct acpi_processor_performance
if (!(acpi_processor_ppc_status & PPC_REGISTERED))
return_VALUE(-EINVAL);
- down(&performance_sem);
+ mutex_lock(&performance_mutex);
pr = processors[cpu];
if (!pr) {
- up(&performance_sem);
+ mutex_unlock(&performance_mutex);
return_VALUE(-ENODEV);
}
if (pr->performance) {
- up(&performance_sem);
+ mutex_unlock(&performance_mutex);
return_VALUE(-EBUSY);
}
@@ -581,13 +582,13 @@ acpi_processor_register_performance(struct acpi_processor_performance
if (acpi_processor_get_performance_info(pr)) {
pr->performance = NULL;
- up(&performance_sem);
+ mutex_unlock(&performance_mutex);
return_VALUE(-EIO);
}
acpi_cpufreq_add_file(pr);
- up(&performance_sem);
+ mutex_unlock(&performance_mutex);
return_VALUE(0);
}
@@ -601,11 +602,11 @@ acpi_processor_unregister_performance(struct acpi_processor_performance
ACPI_FUNCTION_TRACE("acpi_processor_unregister_performance");
- down(&performance_sem);
+ mutex_lock(&performance_mutex);
pr = processors[cpu];
if (!pr) {
- up(&performance_sem);
+ mutex_unlock(&performance_mutex);
return_VOID;
}
@@ -614,7 +615,7 @@ acpi_processor_unregister_performance(struct acpi_processor_performance
acpi_cpufreq_remove_file(pr);
- up(&performance_sem);
+ mutex_unlock(&performance_mutex);
return_VOID;
}