kernfs: add dummy implementation of kernfs_path_from_node()

The dummy version of kernfs_path_from_node() was missing.  This
currently doesn't break anything.  Let's add it for consistency and to
ease adding wrappers around it.

v2: Removed stray ';' which was causing build failures.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h
index 96356ef012de722fe4234cefe606392bfb5ca36a..7d2efd2128bbf008dee13ebaf5608d61cad7522d 100644 (file)
--- a/include/linux/kernfs.h
+++ b/include/linux/kernfs.h
@@ -344,6 +344,11 @@ static inline int kernfs_name(struct kernfs_node *kn, char *buf, size_t buflen)
 static inline size_t kernfs_path_len(struct kernfs_node *kn)
 { return 0; }
 
+static inline int kernfs_path_from_node(struct kernfs_node *root_kn,
+                                       struct kernfs_node *kn,
+                                       char *buf, size_t buflen)
+{ return -ENOSYS; }
+
 static inline char *kernfs_path(struct kernfs_node *kn, char *buf,
                                size_t buflen)
 { return NULL; }