vfs: update documentation on ->i_dentry handling
we used to need to clean it in RCU callback freeing an inode;
in 3.2 that requirement went away. Unfortunately, it hadn't
been reflected in Documentation/filesystems/porting.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/Documentation/filesystems/porting b/Documentation/filesystems/porting
index 8c91d10..ed9fbc2 100644
--- a/Documentation/filesystems/porting
+++ b/Documentation/filesystems/porting
@@ -355,12 +355,10 @@
via rcu-walk path walk (basically, if the file can have had a path name in the
vfs namespace).
- i_dentry and i_rcu share storage in a union, and the vfs expects
-i_dentry to be reinitialized before it is freed, so an:
-
- INIT_LIST_HEAD(&inode->i_dentry);
-
-must be done in the RCU callback.
+ Even though i_dentry and i_rcu share storage in a union, we will
+initialize the former in inode_init_always(), so just leave it alone in
+the callback. It used to be necessary to clean it there, but not anymore
+(starting at 3.2).
--
[recommended]