diff --git a/sound/core/hwdep.c b/sound/core/hwdep.c
index 618c43b..2524e66 100644
--- a/sound/core/hwdep.c
+++ b/sound/core/hwdep.c
@@ -25,6 +25,7 @@
 #include <linux/smp_lock.h>
 #include <linux/slab.h>
 #include <linux/time.h>
+#include <linux/mutex.h>
 #include <sound/core.h>
 #include <sound/control.h>
 #include <sound/minors.h>
@@ -36,7 +37,7 @@
 MODULE_LICENSE("GPL");
 
 static LIST_HEAD(snd_hwdep_devices);
-static DECLARE_MUTEX(register_mutex);
+static DEFINE_MUTEX(register_mutex);
 
 static int snd_hwdep_free(struct snd_hwdep *hwdep);
 static int snd_hwdep_dev_free(struct snd_device *device);
@@ -111,7 +112,7 @@
 
 	init_waitqueue_entry(&wait, current);
 	add_wait_queue(&hw->open_wait, &wait);
-	down(&hw->open_mutex);
+	mutex_lock(&hw->open_mutex);
 	while (1) {
 		if (hw->exclusive && hw->used > 0) {
 			err = -EBUSY;
@@ -128,9 +129,9 @@
 		} else
 			break;
 		set_current_state(TASK_INTERRUPTIBLE);
-		up(&hw->open_mutex);
+		mutex_unlock(&hw->open_mutex);
 		schedule();
-		down(&hw->open_mutex);
+		mutex_lock(&hw->open_mutex);
 		if (signal_pending(current)) {
 			err = -ERESTARTSYS;
 			break;
@@ -147,7 +148,7 @@
 				hw->ops.release(hw, file);
 		}
 	}
-	up(&hw->open_mutex);
+	mutex_unlock(&hw->open_mutex);
 	if (err < 0)
 		module_put(hw->card->module);
 	return err;
@@ -157,7 +158,7 @@
 {
 	int err = -ENXIO;
 	struct snd_hwdep *hw = file->private_data;
-	down(&hw->open_mutex);
+	mutex_lock(&hw->open_mutex);
 	if (hw->ops.release) {
 		err = hw->ops.release(hw, file);
 		wake_up(&hw->open_wait);
@@ -165,7 +166,7 @@
 	if (hw->used > 0)
 		hw->used--;
 	snd_card_file_remove(hw->card, file);
-	up(&hw->open_mutex);
+	mutex_unlock(&hw->open_mutex);
 	module_put(hw->card->module);
 	return err;
 }
@@ -272,7 +273,7 @@
 
 			if (get_user(device, (int __user *)arg))
 				return -EFAULT;
-			down(&register_mutex);
+			mutex_lock(&register_mutex);
 			device = device < 0 ? 0 : device + 1;
 			while (device < SNDRV_MINOR_HWDEPS) {
 				if (snd_hwdep_search(card, device))
@@ -281,7 +282,7 @@
 			}
 			if (device >= SNDRV_MINOR_HWDEPS)
 				device = -1;
-			up(&register_mutex);
+			mutex_unlock(&register_mutex);
 			if (put_user(device, (int __user *)arg))
 				return -EFAULT;
 			return 0;
@@ -294,13 +295,13 @@
 
 			if (get_user(device, &info->device))
 				return -EFAULT;
-			down(&register_mutex);
+			mutex_lock(&register_mutex);
 			hwdep = snd_hwdep_search(card, device);
 			if (hwdep)
 				err = snd_hwdep_info(hwdep, info);
 			else
 				err = -ENXIO;
-			up(&register_mutex);
+			mutex_unlock(&register_mutex);
 			return err;
 		}
 	}
@@ -375,7 +376,7 @@
 		return err;
 	}
 	init_waitqueue_head(&hwdep->open_wait);
-	init_MUTEX(&hwdep->open_mutex);
+	mutex_init(&hwdep->open_mutex);
 	*rhwdep = hwdep;
 	return 0;
 }
@@ -401,9 +402,9 @@
 	int err;
 	char name[32];
 
-	down(&register_mutex);
+	mutex_lock(&register_mutex);
 	if (snd_hwdep_search(hwdep->card, hwdep->device)) {
-		up(&register_mutex);
+		mutex_unlock(&register_mutex);
 		return -EBUSY;
 	}
 	list_add_tail(&hwdep->list, &snd_hwdep_devices);
@@ -414,7 +415,7 @@
 		snd_printk(KERN_ERR "unable to register hardware dependent device %i:%i\n",
 			   hwdep->card->number, hwdep->device);
 		list_del(&hwdep->list);
-		up(&register_mutex);
+		mutex_unlock(&register_mutex);
 		return err;
 	}
 #ifdef CONFIG_SND_OSSEMUL
@@ -434,7 +435,7 @@
 		}
 	}
 #endif
-	up(&register_mutex);
+	mutex_unlock(&register_mutex);
 	return 0;
 }
 
@@ -443,9 +444,9 @@
 	struct snd_hwdep *hwdep = device->device_data;
 
 	snd_assert(hwdep != NULL, return -ENXIO);
-	down(&register_mutex);
+	mutex_lock(&register_mutex);
 	if (snd_hwdep_search(hwdep->card, hwdep->device) != hwdep) {
-		up(&register_mutex);
+		mutex_unlock(&register_mutex);
 		return -EINVAL;
 	}
 #ifdef CONFIG_SND_OSSEMUL
@@ -454,7 +455,7 @@
 #endif
 	snd_unregister_device(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card, hwdep->device);
 	list_del(&hwdep->list);
-	up(&register_mutex);
+	mutex_unlock(&register_mutex);
 	return snd_hwdep_free(hwdep);
 }
 
@@ -469,13 +470,13 @@
 	struct list_head *p;
 	struct snd_hwdep *hwdep;
 
-	down(&register_mutex);
+	mutex_lock(&register_mutex);
 	list_for_each(p, &snd_hwdep_devices) {
 		hwdep = list_entry(p, struct snd_hwdep, list);
 		snd_iprintf(buffer, "%02i-%02i: %s\n",
 			    hwdep->card->number, hwdep->device, hwdep->name);
 	}
-	up(&register_mutex);
+	mutex_unlock(&register_mutex);
 }
 
 static struct snd_info_entry *snd_hwdep_proc_entry;