btrfs_find_first_inode
struct btrfs_inode *btrfs_find_first_inode(struct btrfs_root *root, u64 min_ino);
inode = btrfs_find_first_inode(root, min_ino);
inode = btrfs_find_first_inode(root, min_ino);
inode = btrfs_find_first_inode(root, objectid);
inode = btrfs_find_first_inode(root, key.objectid);
inode = btrfs_find_first_inode(root, key.objectid);