2 files changed, 11 insertions, 10 deletions

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 0010704739e3..74bf0255e98f 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -1144,7 +1144,7 @@ static int lo_ioctl(struct inode * inode, struct file * file,
         struct loop_device *lo = inode->i_bdev->bd_disk->private_data;
         int err;
 
-        down(&lo->lo_ctl_mutex);
+        mutex_lock(&lo->lo_ctl_mutex);
         switch (cmd) {
         case LOOP_SET_FD:
                 err = loop_set_fd(lo, file, inode->i_bdev, arg);
@@ -1170,7 +1170,7 @@ static int lo_ioctl(struct inode * inode, struct file * file,
         default:
                 err = lo->ioctl ? lo->ioctl(lo, cmd, arg) : -EINVAL;
         }
-        up(&lo->lo_ctl_mutex);
+        mutex_unlock(&lo->lo_ctl_mutex);
         return err;
 }
 
@@ -1178,9 +1178,9 @@ static int lo_open(struct inode *inode, struct file *file)
 {
         struct loop_device *lo = inode->i_bdev->bd_disk->private_data;
 
-        down(&lo->lo_ctl_mutex);
+        mutex_lock(&lo->lo_ctl_mutex);
         lo->lo_refcnt++;
-        up(&lo->lo_ctl_mutex);
+        mutex_unlock(&lo->lo_ctl_mutex);
 
         return 0;
 }
@@ -1189,9 +1189,9 @@ static int lo_release(struct inode *inode, struct file *file)
 {
         struct loop_device *lo = inode->i_bdev->bd_disk->private_data;
 
-        down(&lo->lo_ctl_mutex);
+        mutex_lock(&lo->lo_ctl_mutex);
         --lo->lo_refcnt;
-        up(&lo->lo_ctl_mutex);
+        mutex_unlock(&lo->lo_ctl_mutex);
 
         return 0;
 }
@@ -1233,12 +1233,12 @@ int loop_unregister_transfer(int number)
         xfer_funcs[n] = NULL;
 
         for (lo = &loop_dev[0]; lo < &loop_dev[max_loop]; lo++) {
-                down(&lo->lo_ctl_mutex);
+                mutex_lock(&lo->lo_ctl_mutex);
 
                 if (lo->lo_encryption == xfer)
                         loop_release_xfer(lo);
 
-                up(&lo->lo_ctl_mutex);
+                mutex_unlock(&lo->lo_ctl_mutex);
         }
 
         return 0;
@@ -1285,7 +1285,7 @@ static int __init loop_init(void)
                 lo->lo_queue = blk_alloc_queue(GFP_KERNEL);
                 if (!lo->lo_queue)
                         goto out_mem4;
-                init_MUTEX(&lo->lo_ctl_mutex);
+                mutex_init(&lo->lo_ctl_mutex);
                 init_completion(&lo->lo_done);
                 init_completion(&lo->lo_bh_done);
                 lo->lo_number = i;
diff --git a/include/linux/loop.h b/include/linux/loop.h
index f96506782ebe..e76c7611d6cc 100644
--- a/include/linux/loop.h
+++ b/include/linux/loop.h
@@ -17,6 +17,7 @@
 #include <linux/bio.h>
 #include <linux/blkdev.h>
 #include <linux/spinlock.h>
+#include <linux/mutex.h>
 
 /* Possible states of device */
 enum {
@@ -60,7 +61,7 @@ struct loop_device {
         int                     lo_state;
         struct completion       lo_done;
         struct completion       lo_bh_done;
-        struct semaphore        lo_ctl_mutex;
+        struct mutex            lo_ctl_mutex;
         int                     lo_pending;
 
         request_queue_t         *lo_queue;