nilfs2: remove useless b_low and b_high fields from nilfs_bmap struct
This will cut off 16 bytes from the nilfs_bmap struct which is
embedded in the on-memory inode of nilfs.
The b_high field was never used, and the b_low field stores a constant
value which can be determined by whether the inode uses btree for
block mapping or not.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
diff --git a/fs/nilfs2/btree.c b/fs/nilfs2/btree.c
index 5b2606a..f5a0ec6 100644
--- a/fs/nilfs2/btree.c
+++ b/fs/nilfs2/btree.c
@@ -1527,7 +1527,7 @@
if (bh != NULL)
brelse(bh);
- return (maxkey == key) && (nextmaxkey < bmap->b_low);
+ return (maxkey == key) && (nextmaxkey < NILFS_BMAP_LARGE_LOW);
}
static int nilfs_btree_gather_data(struct nilfs_bmap *bmap,
@@ -1634,7 +1634,7 @@
nilfs_btree_commit_convert_and_insert(struct nilfs_bmap *bmap,
__u64 key, __u64 ptr,
const __u64 *keys, const __u64 *ptrs,
- int n, __u64 low, __u64 high,
+ int n,
union nilfs_bmap_ptr_req *dreq,
union nilfs_bmap_ptr_req *nreq,
struct buffer_head *bh)
@@ -1652,7 +1652,7 @@
/* convert and insert */
btree = (struct nilfs_btree *)bmap;
- nilfs_btree_init(bmap, low, high);
+ nilfs_btree_init(bmap);
if (nreq != NULL) {
bmap->b_pops->bpop_commit_alloc_ptr(bmap, dreq);
bmap->b_pops->bpop_commit_alloc_ptr(bmap, nreq);
@@ -1701,13 +1701,10 @@
* @keys:
* @ptrs:
* @n:
- * @low:
- * @high:
*/
int nilfs_btree_convert_and_insert(struct nilfs_bmap *bmap,
__u64 key, __u64 ptr,
- const __u64 *keys, const __u64 *ptrs,
- int n, __u64 low, __u64 high)
+ const __u64 *keys, const __u64 *ptrs, int n)
{
struct buffer_head *bh;
union nilfs_bmap_ptr_req dreq, nreq, *di, *ni;
@@ -1732,7 +1729,7 @@
if (ret < 0)
return ret;
nilfs_btree_commit_convert_and_insert(bmap, key, ptr, keys, ptrs, n,
- low, high, di, ni, bh);
+ di, ni, bh);
nilfs_bmap_add_blocks(bmap, stats.bs_nblocks);
return 0;
}
@@ -2245,14 +2242,11 @@
.btop_assign = nilfs_btree_assign_p,
};
-int nilfs_btree_init(struct nilfs_bmap *bmap, __u64 low, __u64 high)
+int nilfs_btree_init(struct nilfs_bmap *bmap)
{
- struct nilfs_btree *btree;
+ struct nilfs_btree *btree = (struct nilfs_btree *)bmap;
- btree = (struct nilfs_btree *)bmap;
bmap->b_ops = &nilfs_btree_ops;
- bmap->b_low = low;
- bmap->b_high = high;
switch (bmap->b_inode->i_ino) {
case NILFS_DAT_INO:
btree->bt_ops = &nilfs_btree_ops_p;
@@ -2267,7 +2261,5 @@
void nilfs_btree_init_gc(struct nilfs_bmap *bmap)
{
- bmap->b_low = NILFS_BMAP_LARGE_LOW;
- bmap->b_high = NILFS_BMAP_LARGE_HIGH;
bmap->b_ops = &nilfs_btree_ops_gc;
}