1 files changed, 4 insertions, 0 deletions

diff --git a/Documentation/filesystems/ext4.txt b/Documentation/filesystems/ext4.txt
index 919a3293aaa4..6c0108eb0137 100644
--- a/Documentation/filesystems/ext4.txt
+++ b/Documentation/filesystems/ext4.txt
@@ -386,6 +386,10 @@ max_dir_size_kb=n	This limits the size of directories so that any
 i_version               Enable 64-bit inode version support. This option is
                         off by default.
 
+dax                     Use direct access (no page cache).  See
+                        Documentation/filesystems/dax.txt.  Note that
+                        this option is incompatible with data=journal.
+
 Data Mode
 =========
 There are 3 different data modes: