1 files changed, 10 insertions, 9 deletions

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 973e63d530ae..4d710b7a133b 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -10,6 +10,7 @@
 
 #include <linux/init.h>
 #include <linux/module.h>
+#include <linux/mutex.h>
 #include <linux/moduleparam.h>
 #include <linux/blkpg.h>
 #include <linux/bio.h>
@@ -743,14 +744,14 @@ static int dm_any_congested(void *congested_data, int bdi_bits)
 /*-----------------------------------------------------------------
  * An IDR is used to keep track of allocated minor numbers.
  *---------------------------------------------------------------*/
-static DECLARE_MUTEX(_minor_lock);
+static DEFINE_MUTEX(_minor_lock);
 static DEFINE_IDR(_minor_idr);
 
 static void free_minor(unsigned int minor)
 {
-        down(&_minor_lock);
+        mutex_lock(&_minor_lock);
         idr_remove(&_minor_idr, minor);
-        up(&_minor_lock);
+        mutex_unlock(&_minor_lock);
 }
 
 /*
@@ -763,7 +764,7 @@ static int specific_minor(struct mapped_device *md, unsigned int minor)
         if (minor >= (1 << MINORBITS))
                 return -EINVAL;
 
-        down(&_minor_lock);
+        mutex_lock(&_minor_lock);
 
         if (idr_find(&_minor_idr, minor)) {
                 r = -EBUSY;
@@ -788,7 +789,7 @@ static int specific_minor(struct mapped_device *md, unsigned int minor)
         }
 
 out:
-        up(&_minor_lock);
+        mutex_unlock(&_minor_lock);
         return r;
 }
 
@@ -797,7 +798,7 @@ static int next_free_minor(struct mapped_device *md, unsigned int *minor)
         int r;
         unsigned int m;
 
-        down(&_minor_lock);
+        mutex_lock(&_minor_lock);
 
         r = idr_pre_get(&_minor_idr, GFP_KERNEL);
         if (!r) {
@@ -819,7 +820,7 @@ static int next_free_minor(struct mapped_device *md, unsigned int *minor)
         *minor = m;
 
 out:
-        up(&_minor_lock);
+        mutex_unlock(&_minor_lock);
         return r;
 }
 
@@ -1014,13 +1015,13 @@ static struct mapped_device *dm_find_md(dev_t dev)
         if (MAJOR(dev) != _major || minor >= (1 << MINORBITS))
                 return NULL;
 
-        down(&_minor_lock);
+        mutex_lock(&_minor_lock);
 
         md = idr_find(&_minor_idr, minor);
         if (!md || (dm_disk(md)->first_minor != minor))
                 md = NULL;
 
-        up(&_minor_lock);
+        mutex_unlock(&_minor_lock);
 
         return md;
 }