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path: root/drivers/block/loop.c
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Diffstat (limited to 'drivers/block/loop.c')
-rw-r--r--drivers/block/loop.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 91797bbbe70..a10c8c9b6b7 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -67,7 +67,7 @@
#include <linux/compat.h>
#include <linux/suspend.h>
#include <linux/freezer.h>
-#include <linux/smp_lock.h>
+#include <linux/mutex.h>
#include <linux/writeback.h>
#include <linux/buffer_head.h> /* for invalidate_bdev() */
#include <linux/completion.h>
@@ -77,6 +77,7 @@
#include <asm/uaccess.h>
+static DEFINE_MUTEX(loop_mutex);
static LIST_HEAD(loop_devices);
static DEFINE_MUTEX(loop_devices_mutex);
@@ -1409,11 +1410,11 @@ static int lo_open(struct block_device *bdev, fmode_t mode)
{
struct loop_device *lo = bdev->bd_disk->private_data;
- lock_kernel();
+ mutex_lock(&loop_mutex);
mutex_lock(&lo->lo_ctl_mutex);
lo->lo_refcnt++;
mutex_unlock(&lo->lo_ctl_mutex);
- unlock_kernel();
+ mutex_unlock(&loop_mutex);
return 0;
}
@@ -1423,7 +1424,7 @@ static int lo_release(struct gendisk *disk, fmode_t mode)
struct loop_device *lo = disk->private_data;
int err;
- lock_kernel();
+ mutex_lock(&loop_mutex);
mutex_lock(&lo->lo_ctl_mutex);
if (--lo->lo_refcnt)
@@ -1448,7 +1449,7 @@ static int lo_release(struct gendisk *disk, fmode_t mode)
out:
mutex_unlock(&lo->lo_ctl_mutex);
out_unlocked:
- lock_kernel();
+ mutex_unlock(&loop_mutex);
return 0;
}