kill v9fs_dentry_from_dir_inode()

In *all* callers we have a dentry of child of that directory.
Just use ->d_parent of that one, for fsck sake...

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

diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index a1e6c990cd410efded55c826f03bc5db13839d75..e3dd2a1e2bfc18e47abae82bce7ee60238527c08 100644 (file)
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -68,24 +68,6 @@ static gid_t v9fs_get_fsgid_for_create(struct inode *dir_inode)
        return current_fsgid();
 }
 
-/**
- * v9fs_dentry_from_dir_inode - helper function to get the dentry from
- * dir inode.
- *
- */
-
-static struct dentry *v9fs_dentry_from_dir_inode(struct inode *inode)
-{
-       struct dentry *dentry;
-
-       spin_lock(&inode->i_lock);
-       /* Directory should have only one entry. */
-       BUG_ON(S_ISDIR(inode->i_mode) && !list_is_singular(&inode->i_dentry));
-       dentry = list_entry(inode->i_dentry.next, struct dentry, d_alias);
-       spin_unlock(&inode->i_lock);
-       return dentry;
-}
-
 static int v9fs_test_inode_dotl(struct inode *inode, void *data)
 {
        struct v9fs_inode *v9inode = V9FS_I(inode);
@@ -415,7 +397,7 @@ static int v9fs_vfs_mkdir_dotl(struct inode *dir,
        if (dir->i_mode & S_ISGID)
                omode |= S_ISGID;
 
-       dir_dentry = v9fs_dentry_from_dir_inode(dir);
+       dir_dentry = dentry->d_parent;
        dfid = v9fs_fid_lookup(dir_dentry);
        if (IS_ERR(dfid)) {
                err = PTR_ERR(dfid);
@@ -793,7 +775,7 @@ v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
                 dir->i_ino, old_dentry->d_name.name, dentry->d_name.name);
 
        v9ses = v9fs_inode2v9ses(dir);
-       dir_dentry = v9fs_dentry_from_dir_inode(dir);
+       dir_dentry = dentry->d_parent;
        dfid = v9fs_fid_lookup(dir_dentry);
        if (IS_ERR(dfid))
                return PTR_ERR(dfid);
@@ -858,7 +840,7 @@ v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
                return -EINVAL;
 
        v9ses = v9fs_inode2v9ses(dir);
-       dir_dentry = v9fs_dentry_from_dir_inode(dir);
+       dir_dentry = dentry->d_parent;
        dfid = v9fs_fid_lookup(dir_dentry);
        if (IS_ERR(dfid)) {
                err = PTR_ERR(dfid);