diff options
| -rw-r--r-- | fs/block_dev.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c index 36c38f48a4e..528cf053ce9 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -355,10 +355,14 @@ static int bdev_set(struct inode *inode, void *data) static LIST_HEAD(all_bdevs); +static struct lock_class_key bdev_part_lock_key; + struct block_device *bdget(dev_t dev) { struct block_device *bdev; struct inode *inode; + struct gendisk *disk; + int part = 0; inode = iget5_locked(bd_mnt->mnt_sb, hash(dev), bdev_test, bdev_set, &dev); @@ -384,6 +388,11 @@ struct block_device *bdget(dev_t dev) list_add(&bdev->bd_list, &all_bdevs); spin_unlock(&bdev_lock); unlock_new_inode(inode); + mutex_init(&bdev->bd_mutex); + disk = get_gendisk(dev, &part); + if (part) + lockdep_set_class(&bdev->bd_mutex, &bdev_part_lock_key); + put_disk(disk); } return bdev; } |