btrfs_lookup_data_extent 2404 fs/btrfs/ctree.h int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
btrfs_lookup_data_extent  716 fs/btrfs/tree-log.c 			ret = btrfs_lookup_data_extent(fs_info, ins.objectid,