btrfs_read_dev_super 2788 fs/btrfs/disk-io.c bh = btrfs_read_dev_super(fs_devices->latest_bdev); btrfs_read_dev_super 57 fs/btrfs/disk-io.h struct buffer_head *btrfs_read_dev_super(struct block_device *bdev); btrfs_read_dev_super 489 fs/btrfs/volumes.c *bh = btrfs_read_dev_super(*bdev);