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authorShen Feng <shen@cn.fujitsu.com>2008-07-11 19:27:31 -0400
committerTheodore Ts'o <tytso@mit.edu>2008-07-11 19:27:31 -0400
commit69baee062a044ef1588e423e52131710e7584d1a (patch)
treeb9ba2b28b041d1db20d822ba8fc37a3e6dfdc825 /fs/ext4
parent91d99827791fdd5f9424458ad5ae870f89dbcadf (diff)
downloadop-kernel-dev-69baee062a044ef1588e423e52131710e7584d1a.zip
op-kernel-dev-69baee062a044ef1588e423e52131710e7584d1a.tar.gz
ext4: improve some code in rb tree part of dir.c
* remove unnecessary code in free_rb_tree_fname * rename free_rb_tree_fname to ext4_htree_create_dir_info since it and ext4_htree_free_dir_info are a pair * replace kmalloc with kzalloc in ext4_htree_free_dir_info All these make the code more readable and simple. PS: this patch is also suitable for ext3. Signed-off-by: Shen Feng <shen@cn.fujitsu.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4')
-rw-r--r--fs/ext4/dir.c14
1 files changed, 4 insertions, 10 deletions
diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
index 2bf0331..5ed5108 100644
--- a/fs/ext4/dir.c
+++ b/fs/ext4/dir.c
@@ -272,7 +272,7 @@ static void free_rb_tree_fname(struct rb_root *root)
while (n) {
/* Do the node's children first */
- if ((n)->rb_left) {
+ if (n->rb_left) {
n = n->rb_left;
continue;
}
@@ -301,24 +301,18 @@ static void free_rb_tree_fname(struct rb_root *root)
parent->rb_right = NULL;
n = parent;
}
- root->rb_node = NULL;
}
-static struct dir_private_info *create_dir_info(loff_t pos)
+static struct dir_private_info *ext4_htree_create_dir_info(loff_t pos)
{
struct dir_private_info *p;
- p = kmalloc(sizeof(struct dir_private_info), GFP_KERNEL);
+ p = kzalloc(sizeof(struct dir_private_info), GFP_KERNEL);
if (!p)
return NULL;
- p->root.rb_node = NULL;
- p->curr_node = NULL;
- p->extra_fname = NULL;
- p->last_pos = 0;
p->curr_hash = pos2maj_hash(pos);
p->curr_minor_hash = pos2min_hash(pos);
- p->next_hash = 0;
return p;
}
@@ -433,7 +427,7 @@ static int ext4_dx_readdir(struct file * filp,
int ret;
if (!info) {
- info = create_dir_info(filp->f_pos);
+ info = ext4_htree_create_dir_info(filp->f_pos);
if (!info)
return -ENOMEM;
filp->private_data = info;
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