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nilfs2: remove useless b_low and b_high fields from nilfs_bmap struct

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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
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13
fs/nilfs2/direct.c
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@@ -242,8 +242,7 @@ static int nilfs_direct_gather_data(struct nilfs_bmap *bmap,
}
int nilfs_direct_delete_and_convert(struct nilfs_bmap *bmap,
__u64 key, __u64 *keys, __u64 *ptrs,
int n, __u64 low, __u64 high)
__u64 key, __u64 *keys, __u64 *ptrs, int n)
{
struct nilfs_direct *direct;
__le64 *dptrs;
@@ -273,8 +272,7 @@ int nilfs_direct_delete_and_convert(struct nilfs_bmap *bmap,
dptrs[i] = NILFS_BMAP_INVALID_PTR;
}
nilfs_direct_init(bmap, low, high);
nilfs_direct_init(bmap);
return 0;
}
@@ -410,14 +408,11 @@ static const struct nilfs_direct_operations nilfs_direct_ops_p = {
.dop_assign = nilfs_direct_assign_p,
};
int nilfs_direct_init(struct nilfs_bmap *bmap, __u64 low, __u64 high)
int nilfs_direct_init(struct nilfs_bmap *bmap)
{
struct nilfs_direct *direct;
struct nilfs_direct *direct = (struct nilfs_direct *)bmap;
direct = (struct nilfs_direct *)bmap;
bmap->b_ops = &nilfs_direct_ops;
bmap->b_low = low;
bmap->b_high = high;
switch (bmap->b_inode->i_ino) {
case NILFS_DAT_INO:
direct->d_ops = &nilfs_direct_ops_p;