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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/bmap.c
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@ -101,8 +101,7 @@ static int nilfs_bmap_do_insert(struct nilfs_bmap *bmap, __u64 key, __u64 ptr)
if (n < 0)
return n;
ret = nilfs_btree_convert_and_insert(
bmap, key, ptr, keys, ptrs, n,
NILFS_BMAP_LARGE_LOW, NILFS_BMAP_LARGE_HIGH);
bmap, key, ptr, keys, ptrs, n);
if (ret == 0)
bmap->b_u.u_flags |= NILFS_BMAP_LARGE;
@ -158,8 +157,7 @@ static int nilfs_bmap_do_delete(struct nilfs_bmap *bmap, __u64 key)
if (n < 0)
return n;
ret = nilfs_direct_delete_and_convert(
bmap, key, keys, ptrs, n,
NILFS_BMAP_SMALL_LOW, NILFS_BMAP_SMALL_HIGH);
bmap, key, keys, ptrs, n);
if (ret == 0)
bmap->b_u.u_flags &= ~NILFS_BMAP_LARGE;
@ -681,12 +679,7 @@ int nilfs_bmap_read(struct nilfs_bmap *bmap, struct nilfs_inode *raw_inode)
}
return (bmap->b_u.u_flags & NILFS_BMAP_LARGE) ?
nilfs_btree_init(bmap,
NILFS_BMAP_LARGE_LOW,
NILFS_BMAP_LARGE_HIGH) :
nilfs_direct_init(bmap,
NILFS_BMAP_SMALL_LOW,
NILFS_BMAP_SMALL_HIGH);
nilfs_btree_init(bmap) : nilfs_direct_init(bmap);
}
/**