[ARM] Oprofile: Convert semaphore to mutex

op_arm_sem is being used as a mutex, so convert it to use
real mutexes.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/oprofile/common.c b/arch/arm/oprofile/common.c
index 6f8bc1f0e6a11a9eae95968f7356ed5a2b895a78..b57b6d11c9fb5366d0d08472b526d91a89f544aa 100644 (file)
--- a/arch/arm/oprofile/common.c
+++ b/arch/arm/oprofile/common.c
@@ -11,14 +11,14 @@
 #include <linux/oprofile.h>
 #include <linux/errno.h>
 #include <linux/sysdev.h>
-#include <asm/semaphore.h>
+#include <linux/mutex.h>
 
 #include "op_counter.h"
 #include "op_arm_model.h"
 
 static struct op_arm_model_spec *op_arm_model;
 static int op_arm_enabled;
-static struct semaphore op_arm_sem;
+static DEFINE_MUTEX(op_arm_mutex);
 
 struct op_counter_config counter_config[OP_MAX_COUNTER];
 
@@ -57,40 +57,40 @@ static int op_arm_start(void)
 {
        int ret = -EBUSY;
 
-       down(&op_arm_sem);
+       mutex_lock(&op_arm_mutex);
        if (!op_arm_enabled) {
                ret = op_arm_model->start();
                op_arm_enabled = !ret;
        }
-       up(&op_arm_sem);
+       mutex_unlock(&op_arm_mutex);
        return ret;
 }
 
 static void op_arm_stop(void)
 {
-       down(&op_arm_sem);
+       mutex_lock(&op_arm_mutex);
        if (op_arm_enabled)
                op_arm_model->stop();
        op_arm_enabled = 0;
-       up(&op_arm_sem);
+       mutex_unlock(&op_arm_mutex);
 }
 
 #ifdef CONFIG_PM
 static int op_arm_suspend(struct sys_device *dev, pm_message_t state)
 {
-       down(&op_arm_sem);
+       mutex_lock(&op_arm_mutex);
        if (op_arm_enabled)
                op_arm_model->stop();
-       up(&op_arm_sem);
+       mutex_unlock(&op_arm_mutex);
        return 0;
 }
 
 static int op_arm_resume(struct sys_device *dev)
 {
-       down(&op_arm_sem);
+       mutex_lock(&op_arm_mutex);
        if (op_arm_enabled && op_arm_model->start())
                op_arm_enabled = 0;
-       up(&op_arm_sem);
+       mutex_unlock(&op_arm_mutex);
        return 0;
 }
 
@@ -135,8 +135,6 @@ int __init oprofile_arch_init(struct oprofile_operations *ops)
 #endif
 
        if (spec) {
-               init_MUTEX(&op_arm_sem);
-
                ret = spec->init();
                if (ret < 0)
                        return ret;
@@ -163,4 +161,3 @@ void oprofile_arch_exit(void)
                op_arm_model = NULL;
        }
 }
-