xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

nilfs2: remove useless b_low and b_high fields from nilfs_bmap struct

Browse Source 
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>
This commit is contained in:
Ryusuke Konishi
2009-05-24 00:09:44 +09:00
parent e473c1f265
commit 3033342a0b
6 changed files with 18 additions and 43 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
fs/nilfs2/btree.c
View File

@@ -1527,7 +1527,7 @@ static int nilfs_btree_check_delete(struct nilfs_bmap *bmap, __u64 key)
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 @@ static void
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 @@ nilfs_btree_commit_convert_and_insert(struct nilfs_bmap *bmap,
/* 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 @@ nilfs_btree_commit_convert_and_insert(struct nilfs_bmap *bmap,
* @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 @@ int nilfs_btree_convert_and_insert(struct nilfs_bmap *bmap,
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 @@ static const struct nilfs_btree_operations nilfs_btree_ops_p = {
.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 @@ int nilfs_btree_init(struct nilfs_bmap *bmap, __u64 low, __u64 high)
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;
}