diff options
Diffstat (limited to 'fs/block_dev.c')
| -rw-r--r-- | fs/block_dev.c | 8 |
1 files changed, 1 insertions, 7 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c index 5d1ed50..22506eb 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -216,8 +216,6 @@ EXPORT_SYMBOL(fsync_bdev); * freeze_bdev -- lock a filesystem and force it into a consistent state * @bdev: blockdevice to lock * - * This takes the block device bd_mount_sem to make sure no new mounts - * happen on bdev until thaw_bdev() is called. * If a superblock is found on this device, we take the s_umount semaphore * on it to make sure nobody unmounts until the snapshot creation is done. * The reference counter (bd_fsfreeze_count) guarantees that only the last @@ -240,7 +238,6 @@ struct super_block *freeze_bdev(struct block_device *bdev) } bdev->bd_fsfreeze_count++; - down(&bdev->bd_mount_sem); sb = get_super(bdev); if (sb && !(sb->s_flags & MS_RDONLY)) { sb->s_frozen = SB_FREEZE_WRITE; @@ -260,7 +257,6 @@ struct super_block *freeze_bdev(struct block_device *bdev) "VFS:Filesystem freeze failed\n"); sb->s_frozen = SB_UNFROZEN; drop_super(sb); - up(&bdev->bd_mount_sem); bdev->bd_fsfreeze_count--; mutex_unlock(&bdev->bd_fsfreeze_mutex); return ERR_PTR(error); @@ -271,7 +267,7 @@ struct super_block *freeze_bdev(struct block_device *bdev) sync_blockdev(bdev); mutex_unlock(&bdev->bd_fsfreeze_mutex); - return sb; /* thaw_bdev releases s->s_umount and bd_mount_sem */ + return sb; /* thaw_bdev releases s->s_umount */ } EXPORT_SYMBOL(freeze_bdev); @@ -321,7 +317,6 @@ int thaw_bdev(struct block_device *bdev, struct super_block *sb) drop_super(sb); } - up(&bdev->bd_mount_sem); mutex_unlock(&bdev->bd_fsfreeze_mutex); return 0; } @@ -430,7 +425,6 @@ static void init_once(void *foo) memset(bdev, 0, sizeof(*bdev)); mutex_init(&bdev->bd_mutex); - sema_init(&bdev->bd_mount_sem, 1); INIT_LIST_HEAD(&bdev->bd_inodes); INIT_LIST_HEAD(&bdev->bd_list); #ifdef CONFIG_SYSFS |