spaceBitmapDesc
(sizeof(struct spaceBitmapDesc) << 3);
block = first_block + (sizeof(struct spaceBitmapDesc) << 3);
block = goal + (sizeof(struct spaceBitmapDesc) << 3);
group_start = block_group ? 0 : sizeof(struct spaceBitmapDesc);
group_start = block_group ? 0 : sizeof(struct spaceBitmapDesc);
(sizeof(struct spaceBitmapDesc) << 3);
off = sizeof(struct spaceBitmapDesc) << 3;
(sizeof(struct spaceBitmapDesc) << 3);
(sizeof(struct spaceBitmapDesc) << 3),
sizeof(struct spaceBitmapDesc) << 3,
struct spaceBitmapDesc *bm;
bm = (struct spaceBitmapDesc *)bh->b_data;
index = sizeof(struct spaceBitmapDesc); /* offset in first block only */