[PATCH] get rid of on-stack dentry in ext2_get_parent()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

3 files changed, 15 insertions, 20 deletions

diff --git a/fs/ext2/dir.c b/fs/ext2/dir.c
index 11a49ce84392..9a0fc400f91c 100644
--- a/fs/ext2/dir.c
+++ b/fs/ext2/dir.c
@@ -354,11 +354,11 @@ ext2_readdir (struct file * filp, void * dirent, filldir_t filldir)
  * (as a parameter - res_dir). Page is returned mapped and unlocked.
  * Entry is guaranteed to be valid.
  */
-struct ext2_dir_entry_2 * ext2_find_entry (struct inode * dir,
-                        struct dentry *dentry, struct page ** res_page)
+struct ext2_dir_entry_2 *ext2_find_entry (struct inode * dir,
+                        struct qstr *child, struct page ** res_page)
 {
-        const char *name = dentry->d_name.name;
-        int namelen = dentry->d_name.len;
+        const char *name = child->name;
+        int namelen = child->len;
         unsigned reclen = EXT2_DIR_REC_LEN(namelen);
         unsigned long start, n;
         unsigned long npages = dir_pages(dir);
@@ -431,13 +431,13 @@ struct ext2_dir_entry_2 * ext2_dotdot (struct inode *dir, struct page **p)
         return de;
 }
 
-ino_t ext2_inode_by_name(struct inode * dir, struct dentry *dentry)
+ino_t ext2_inode_by_name(struct inode *dir, struct qstr *child)
 {
         ino_t res = 0;
-        struct ext2_dir_entry_2 * de;
+        struct ext2_dir_entry_2 *de;
         struct page *page;
         
-        de = ext2_find_entry (dir, dentry, &page);
+        de = ext2_find_entry (dir, child, &page);
         if (de) {
                 res = le32_to_cpu(de->inode);
                 ext2_put_page(page);
diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h
index bae998c1e44e..3203042b36ef 100644
--- a/fs/ext2/ext2.h
+++ b/fs/ext2/ext2.h
@@ -105,9 +105,9 @@ extern void ext2_rsv_window_add(struct super_block *sb, struct ext2_reserve_wind
 
 /* dir.c */
 extern int ext2_add_link (struct dentry *, struct inode *);
-extern ino_t ext2_inode_by_name(struct inode *, struct dentry *);
+extern ino_t ext2_inode_by_name(struct inode *, struct qstr *);
 extern int ext2_make_empty(struct inode *, struct inode *);
-extern struct ext2_dir_entry_2 * ext2_find_entry (struct inode *,struct dentry *, struct page **);
+extern struct ext2_dir_entry_2 * ext2_find_entry (struct inode *,struct qstr *, struct page **);
 extern int ext2_delete_entry (struct ext2_dir_entry_2 *, struct page *);
 extern int ext2_empty_dir (struct inode *);
 extern struct ext2_dir_entry_2 * ext2_dotdot (struct inode *, struct page **);
diff --git a/fs/ext2/namei.c b/fs/ext2/namei.c
index a1b328ab1e55..2a747252ec12 100644
--- a/fs/ext2/namei.c
+++ b/fs/ext2/namei.c
@@ -60,7 +60,7 @@ static struct dentry *ext2_lookup(struct inode * dir, struct dentry *dentry, str
         if (dentry->d_name.len > EXT2_NAME_LEN)
                 return ERR_PTR(-ENAMETOOLONG);
 
-        ino = ext2_inode_by_name(dir, dentry);
+        ino = ext2_inode_by_name(dir, &dentry->d_name);
         inode = NULL;
         if (ino) {
                 inode = ext2_iget(dir->i_sb, ino);
@@ -72,13 +72,8 @@ static struct dentry *ext2_lookup(struct inode * dir, struct dentry *dentry, str
 
 struct dentry *ext2_get_parent(struct dentry *child)
 {
-        unsigned long ino;
-        struct dentry dotdot;
-
-        dotdot.d_name.name = "..";
-        dotdot.d_name.len = 2;
-
-        ino = ext2_inode_by_name(child->d_inode, &dotdot);
+        struct qstr dotdot = {.name = "..", .len = 2};
+        unsigned long ino = ext2_inode_by_name(child->d_inode, &dotdot);
         if (!ino)
                 return ERR_PTR(-ENOENT);
         return d_obtain_alias(ext2_iget(child->d_inode->i_sb, ino));
@@ -246,7 +241,7 @@ static int ext2_unlink(struct inode * dir, struct dentry *dentry)
         struct page * page;
         int err = -ENOENT;
 
-        de = ext2_find_entry (dir, dentry, &page);
+        de = ext2_find_entry (dir, &dentry->d_name, &page);
         if (!de)
                 goto out;
 
@@ -288,7 +283,7 @@ static int ext2_rename (struct inode * old_dir, struct dentry * old_dentry,
         struct ext2_dir_entry_2 * old_de;
         int err = -ENOENT;
 
-        old_de = ext2_find_entry (old_dir, old_dentry, &old_page);
+        old_de = ext2_find_entry (old_dir, &old_dentry->d_name, &old_page);
         if (!old_de)
                 goto out;
 
@@ -308,7 +303,7 @@ static int ext2_rename (struct inode * old_dir, struct dentry * old_dentry,
                         goto out_dir;
 
                 err = -ENOENT;
-                new_de = ext2_find_entry (new_dir, new_dentry, &new_page);
+                new_de = ext2_find_entry (new_dir, &new_dentry->d_name, &new_page);
                 if (!new_de)
                         goto out_dir;
                 inode_inc_link_count(old_inode);