[PATCH] kill d_alloc_anon

Remove d_alloc_anon now that no users are left.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 37 insertions, 71 deletions

diff --git a/fs/dcache.c b/fs/dcache.c
index d45ff7f5ecc2..1710d2484fd9 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1111,70 +1111,6 @@ static inline struct hlist_head *d_hash(struct dentry *parent,
 }
 
 /**
- * d_alloc_anon - allocate an anonymous dentry
- * @inode: inode to allocate the dentry for
- *
- * This is similar to d_alloc_root.  It is used by filesystems when
- * creating a dentry for a given inode, often in the process of 
- * mapping a filehandle to a dentry.  The returned dentry may be
- * anonymous, or may have a full name (if the inode was already
- * in the cache).  The file system may need to make further
- * efforts to connect this dentry into the dcache properly.
- *
- * When called on a directory inode, we must ensure that
- * the inode only ever has one dentry.  If a dentry is
- * found, that is returned instead of allocating a new one.
- *
- * On successful return, the reference to the inode has been transferred
- * to the dentry.  If %NULL is returned (indicating kmalloc failure),
- * the reference on the inode has not been released.
- */
-
-struct dentry * d_alloc_anon(struct inode *inode)
-{
-        static const struct qstr anonstring = { .name = "" };
-        struct dentry *tmp;
-        struct dentry *res;
-
-        if ((res = d_find_alias(inode))) {
-                iput(inode);
-                return res;
-        }
-
-        tmp = d_alloc(NULL, &anonstring);
-        if (!tmp)
-                return NULL;
-
-        tmp->d_parent = tmp; /* make sure dput doesn't croak */
-        
-        spin_lock(&dcache_lock);
-        res = __d_find_alias(inode, 0);
-        if (!res) {
-                /* attach a disconnected dentry */
-                res = tmp;
-                tmp = NULL;
-                spin_lock(&res->d_lock);
-                res->d_sb = inode->i_sb;
-                res->d_parent = res;
-                res->d_inode = inode;
-                res->d_flags |= DCACHE_DISCONNECTED;
-                res->d_flags &= ~DCACHE_UNHASHED;
-                list_add(&res->d_alias, &inode->i_dentry);
-                hlist_add_head(&res->d_hash, &inode->i_sb->s_anon);
-                spin_unlock(&res->d_lock);
-
-                inode = NULL; /* don't drop reference */
-        }
-        spin_unlock(&dcache_lock);
-
-        if (inode)
-                iput(inode);
-        if (tmp)
-                dput(tmp);
-        return res;
-}
-
-/**
  * d_obtain_alias - find or allocate a dentry for a given inode
  * @inode: inode to allocate the dentry for
  *
@@ -1194,19 +1130,50 @@ struct dentry * d_alloc_anon(struct inode *inode)
  */
 struct dentry *d_obtain_alias(struct inode *inode)
 {
-        struct dentry *dentry;
+        static const struct qstr anonstring = { .name = "" };
+        struct dentry *tmp;
+        struct dentry *res;
 
         if (!inode)
                 return ERR_PTR(-ESTALE);
         if (IS_ERR(inode))
                 return ERR_CAST(inode);
 
-        dentry = d_alloc_anon(inode);
-        if (!dentry) {
-                iput(inode);
-                dentry = ERR_PTR(-ENOMEM);
+        res = d_find_alias(inode);
+        if (res)
+                goto out_iput;
+
+        tmp = d_alloc(NULL, &anonstring);
+        if (!tmp) {
+                res = ERR_PTR(-ENOMEM);
+                goto out_iput;
         }
-        return dentry;
+        tmp->d_parent = tmp; /* make sure dput doesn't croak */
+
+        spin_lock(&dcache_lock);
+        res = __d_find_alias(inode, 0);
+        if (res) {
+                spin_unlock(&dcache_lock);
+                dput(tmp);
+                goto out_iput;
+        }
+
+        /* attach a disconnected dentry */
+        spin_lock(&tmp->d_lock);
+        tmp->d_sb = inode->i_sb;
+        tmp->d_inode = inode;
+        tmp->d_flags |= DCACHE_DISCONNECTED;
+        tmp->d_flags &= ~DCACHE_UNHASHED;
+        list_add(&tmp->d_alias, &inode->i_dentry);
+        hlist_add_head(&tmp->d_hash, &inode->i_sb->s_anon);
+        spin_unlock(&tmp->d_lock);
+
+        spin_unlock(&dcache_lock);
+        return tmp;
+
+ out_iput:
+        iput(inode);
+        return res;
 }
 EXPORT_SYMBOL_GPL(d_obtain_alias);
 
@@ -2379,7 +2346,6 @@ void __init vfs_caches_init(unsigned long mempages)
 }
 
 EXPORT_SYMBOL(d_alloc);
-EXPORT_SYMBOL(d_alloc_anon);
 EXPORT_SYMBOL(d_alloc_root);
 EXPORT_SYMBOL(d_delete);
 EXPORT_SYMBOL(d_find_alias);