diff options
Diffstat (limited to 'drivers/md/dm.c')
| -rw-r--r-- | drivers/md/dm.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index ac384b2a6a3..7967eca5a2d 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -15,7 +15,6 @@ #include <linux/blkpg.h> #include <linux/bio.h> #include <linux/buffer_head.h> -#include <linux/smp_lock.h> #include <linux/mempool.h> #include <linux/slab.h> #include <linux/idr.h> @@ -33,6 +32,7 @@ #define DM_COOKIE_ENV_VAR_NAME "DM_COOKIE" #define DM_COOKIE_LENGTH 24 +static DEFINE_MUTEX(dm_mutex); static const char *_name = DM_NAME; static unsigned int major = 0; @@ -344,7 +344,7 @@ static int dm_blk_open(struct block_device *bdev, fmode_t mode) { struct mapped_device *md; - lock_kernel(); + mutex_lock(&dm_mutex); spin_lock(&_minor_lock); md = bdev->bd_disk->private_data; @@ -362,7 +362,7 @@ static int dm_blk_open(struct block_device *bdev, fmode_t mode) out: spin_unlock(&_minor_lock); - unlock_kernel(); + mutex_unlock(&dm_mutex); return md ? 0 : -ENXIO; } @@ -371,10 +371,10 @@ static int dm_blk_close(struct gendisk *disk, fmode_t mode) { struct mapped_device *md = disk->private_data; - lock_kernel(); + mutex_lock(&dm_mutex); atomic_dec(&md->open_count); dm_put(md); - unlock_kernel(); + mutex_unlock(&dm_mutex); return 0; } |