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-rw-r--r--Documentation/filesystems/porting5
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/filesystems/porting b/Documentation/filesystems/porting
index cf43bc4dbf31..a60fa516d4cb 100644
--- a/Documentation/filesystems/porting
+++ b/Documentation/filesystems/porting
@@ -638,3 +638,8 @@ in your dentry operations instead.
inode to d_splice_alias() will also do the right thing (equivalent of
d_add(dentry, NULL); return NULL;), so that kind of special cases
also doesn't need a separate treatment.
+--
+[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.