bitmap_pos 373 fs/btrfs/free-space-tree.c u32 bitmap_pos, data_size; bitmap_pos 379 fs/btrfs/free-space-tree.c bitmap_pos = div_u64(found_key.objectid - start, bitmap_pos 382 fs/btrfs/free-space-tree.c bitmap_cursor = ((char *)bitmap) + bitmap_pos;