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);