1 files changed, 19 insertions, 15 deletions

diff --git a/arch/arm/oprofile/common.c b/arch/arm/oprofile/common.c
index 6f8bc1f0e6a1..6f833358cd06 100644
--- a/arch/arm/oprofile/common.c
+++ b/arch/arm/oprofile/common.c
@@ -10,17 +10,18 @@
 #include <linux/init.h>
 #include <linux/oprofile.h>
 #include <linux/errno.h>
+#include <linux/slab.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];
+struct op_counter_config *counter_config;
 
 static int op_arm_create_files(struct super_block *sb, struct dentry *root)
 {
@@ -28,7 +29,7 @@ static int op_arm_create_files(struct super_block *sb, struct dentry *root)
 
 	for (i = 0; i < op_arm_model->num_counters; i++) {
 		struct dentry *dir;
-		char buf[2];
+		char buf[4];
 
 		snprintf(buf, sizeof buf, "%d", i);
 		dir = oprofilefs_mkdir(sb, root, buf);
@@ -57,40 +58,40 @@ 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;
 }
 
@@ -135,12 +136,15 @@ 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;
 
+		counter_config = kcalloc(spec->num_counters, sizeof(struct op_counter_config),
+					 GFP_KERNEL);
+		if (!counter_config)
+			return -ENOMEM;
+
 		op_arm_model = spec;
 		init_driverfs();
 		ops->create_files = op_arm_create_files;
@@ -162,5 +166,5 @@ void oprofile_arch_exit(void)
 		exit_driverfs();
 		op_arm_model = NULL;
 	}
+	kfree(counter_config);
 }
-