make configfs_pin_fs() return root dentry on success

... and make configfs_mnt static

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

1 files changed, 6 insertions, 8 deletions

diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c
index 6c560e77965c..7e6c52d8a207 100644
--- a/fs/configfs/dir.c
+++ b/fs/configfs/dir.c
@@ -1075,16 +1075,15 @@ int configfs_depend_item(struct configfs_subsystem *subsys,
          * Pin the configfs filesystem.  This means we can safely access
          * the root of the configfs filesystem.
          */
-        ret = configfs_pin_fs();
-        if (ret)
-                return ret;
+        root = configfs_pin_fs();
+        if (IS_ERR(root))
+                return PTR_ERR(root);
 
         /*
          * Next, lock the root directory.  We're going to check that the
          * subsystem is really registered, and so we need to lock out
          * configfs_[un]register_subsystem().
          */
-        root = configfs_mount->mnt_root;
         mutex_lock(&root->d_inode->i_mutex);
 
         root_sd = root->d_fsdata;
@@ -1673,14 +1672,13 @@ int configfs_register_subsystem(struct configfs_subsystem *subsys)
         struct dentry *root;
         struct configfs_dirent *sd;
 
-        err = configfs_pin_fs();
-        if (err)
-                return err;
+        root = configfs_pin_fs();
+        if (IS_ERR(root))
+                return PTR_ERR(root);
 
         if (!group->cg_item.ci_name)
                 group->cg_item.ci_name = group->cg_item.ci_namebuf;
 
-        root = configfs_mount->mnt_root;
         sd = root->d_fsdata;
         link_group(to_config_group(sd->s_element), group);