[PATCH 1/3] docs: virtiofs: Fix descriptions about virtiofs mount option

[Keiichi Watanabe <keiichiw@chromium.org>]

Since virtiofs and FUSE don't share mount options, fixes the
description. Also, explains DAX option as the only virtiofs-specific
option so far.

Signed-off-by: Keiichi Watanabe <keiichiw@chromium.org>
---

 Documentation/filesystems/dax.rst      | 1 +
 Documentation/filesystems/virtiofs.rst | 5 ++++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/Documentation/filesystems/dax.rst b/Documentation/filesystems/dax.rst
index c04609d8ee24..77c5d4550ecd 100644
--- a/Documentation/filesystems/dax.rst
+++ b/Documentation/filesystems/dax.rst
@@ -167,6 +167,7 @@ Setting the `FS_XFLAG_DAX` flag (specifically or through inheritance) occurs eve
 if the underlying media does not support dax and/or the filesystem is
 overridden with a mount option.
 
+.. _virtiofs-dax:
 
 Enabling DAX on virtiofs
 ----------------------------
diff --git a/Documentation/filesystems/virtiofs.rst b/Documentation/filesystems/virtiofs.rst
index fd4d2484e949..fdec5a7840f7 100644
--- a/Documentation/filesystems/virtiofs.rst
+++ b/Documentation/filesystems/virtiofs.rst
@@ -43,7 +43,10 @@ Mount options
 -------------
 
 virtiofs supports general VFS mount options, for example, remount,
-ro, rw, context, etc. It also supports FUSE mount options.
+ro, rw, context, etc. Also, virtiofs has its own options.
+
+dax[=always,never,inode]
+  Enable direct access for files. See :ref:`virtiofs-dax`.
 
 atime behavior
 ^^^^^^^^^^^^^^
-- 
2.41.0.185.g7c58973941-goog