1 files changed, 5 insertions, 0 deletions

diff --git a/Documentation/filesystems/porting b/Documentation/filesystems/porting
index b8d3ddd8b8db..d392d4b0c393 100644
--- a/Documentation/filesystems/porting
+++ b/Documentation/filesystems/porting
@@ -663,3 +663,8 @@ in your dentry operations instead.
         there, but that's it.  Freeing memory in the callback is fine; doing
         more than that is possible, but requires a lot of care and is best
         avoided.
+--
+[mandatory]
+        DCACHE_RCUACCESS is gone; having an RCU delay on dentry freeing is the
+        default.  DCACHE_NORCU opts out, and only d_alloc_pseudo() has any
+        business doing so.