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| author |   Russell King <rmk+kernel@armlinux.org.uk> | 2019-12-09 11:10:21 +0000 |
|---|---|---|
| committer |   Al Viro <viro@zeniv.linux.org.uk> | 2020-01-20 20:12:41 -0500 |
| commit | 016936b32131d0b33328d8c109f83fabb56618a3 (patch) | |
| tree | 6381bbae78c24b096f32180e4e7ab7e6389e3e46 /fs/adfs/dir_fplus.c | |
| parent | fs/adfs: dir: add more efficient iterate() per-format method (diff) | |
| download | linux-dev-016936b32131d0b33328d8c109f83fabb56618a3.tar.xz linux-dev-016936b32131d0b33328d8c109f83fabb56618a3.zip | |
fs/adfs: dir: use pointers to access directory head/tails
Add and use pointers in the adfs_dir structure to access the directory
head and tail structures, which will always be contiguous in a buffer.
This allows us to avoid memcpy()ing the data in the new directory code,
making it slightly more efficient.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/adfs/dir_fplus.c')
| -rw-r--r-- | fs/adfs/dir_fplus.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/fs/adfs/dir_fplus.c b/fs/adfs/dir_fplus.c index edcbaa94ecb9..6f2dbcf6819b 100644 --- a/fs/adfs/dir_fplus.c +++ b/fs/adfs/dir_fplus.c @@ -20,7 +20,7 @@ static int adfs_fplus_read(struct super_block *sb, u32 indaddr, if (ret) return ret; - h = (struct adfs_bigdirheader *)dir->bhs[0]->b_data; + dir->bighead = h = (void *)dir->bhs[0]->b_data; dirsize = le32_to_cpu(h->bigdirsize); if (dirsize != size) { adfs_msg(sb, KERN_WARNING, @@ -40,7 +40,7 @@ static int adfs_fplus_read(struct super_block *sb, u32 indaddr, if (ret) return ret; - t = (struct adfs_bigdirtail *) + dir->bigtail = t = (struct adfs_bigdirtail *) (dir->bhs[dir->nr_buffers - 1]->b_data + (sb->s_blocksize - 8)); if (t->bigdirendname != cpu_to_le32(BIGDIRENDNAME) || @@ -62,11 +62,9 @@ out: static int adfs_fplus_setpos(struct adfs_dir *dir, unsigned int fpos) { - struct adfs_bigdirheader *h = - (struct adfs_bigdirheader *) dir->bhs[0]->b_data; int ret = -ENOENT; - if (fpos <= le32_to_cpu(h->bigdirentries)) { + if (fpos <= le32_to_cpu(dir->bighead->bigdirentries)) { dir->pos = fpos; ret = 0; } @@ -77,8 +75,7 @@ adfs_fplus_setpos(struct adfs_dir *dir, unsigned int fpos) static int adfs_fplus_getnext(struct adfs_dir *dir, struct object_info *obj) { - struct adfs_bigdirheader *h = - (struct adfs_bigdirheader *) dir->bhs[0]->b_data; + struct adfs_bigdirheader *h = dir->bighead; struct adfs_bigdirentry bde; unsigned int offset; int ret; |