1 files changed, 6 insertions, 1 deletions

diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index 4682586b147a..3c4b2f1b64d0 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -865,7 +865,7 @@ struct dentry_operations {
         void (*d_iput)(struct dentry *, struct inode *);
         char *(*d_dname)(struct dentry *, char *, int);
         struct vfsmount *(*d_automount)(struct path *);
-        int (*d_manage)(struct dentry *, bool);
+        int (*d_manage)(struct dentry *, bool, bool);
 };
 
   d_revalidate: called when the VFS needs to revalidate a dentry. This
@@ -960,6 +960,11 @@ struct dentry_operations {
         held by the caller and the function should not initiate any mounts or
         unmounts that it will then wait for.
 
+        If the 'rcu_walk' parameter is true, then the caller is doing a
+        pathwalk in RCU-walk mode.  Sleeping is not permitted in this mode,
+        and the caller can be asked to leave it and call again by returing
+        -ECHILD.
+
         This function is only used if DCACHE_MANAGE_TRANSIT is set on the
         dentry being transited from.