linux-kernel - [PATCH v3 02/13] docs: path-lookup: update path_to

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Date:   Thu, 27 May 2021 17:16:07 +0800
From:   Fox Chen <foxhlchen@...il.com>
To:     neilb@...e.de
Cc:     Fox Chen <foxhlchen@...il.com>, corbet@....net,
        vegard.nossum@...cle.com, viro@...iv.linux.org.uk,
        rdunlap@...radead.org, grandmaster@...klimov.de,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        gregkh@...uxfoundation.org
Subject: [PATCH v3 02/13] docs: path-lookup: update path_to_nameidata() part

No path_to_namei() anymore, step_into() will be called.
Related commit: commit c99687a03a78 ("fold path_to_nameidata()
into its only remaining caller")

Signed-off-by: Fox Chen <foxhlchen@...il.com>
---
 Documentation/filesystems/path-lookup.rst | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/Documentation/filesystems/path-lookup.rst b/Documentation/filesystems/path-lookup.rst
index 751082d469e8..6ea0880fb982 100644
--- a/Documentation/filesystems/path-lookup.rst
+++ b/Documentation/filesystems/path-lookup.rst
@@ -453,11 +453,12 @@ to find a definitive answer.
 As the last step of ``walk_component()``, ``step_into()`` will be called either
 directly from walk_component() or from handle_dots().  It calls
 ``handle_mounts()``, to check and handle mount points, in which a new
-``struct path`` containing a counted reference to the new dentry and a
-reference to the new ``vfsmount`` which is only counted if it is
-different from the previous ``vfsmount``.  It then calls
-``path_to_nameidata()`` to install the new ``struct path`` in the
-``struct nameidata`` and drop the unneeded references.
+``struct path`` is created containing a counted reference to the new dentry and
+a reference to the new ``vfsmount`` which is only counted if it is
+different from the previous ``vfsmount``. Then if there is
+a symbolic link, ``step_into()`` calls ``pick_link()`` to deal with it,
+otherwise it installs the new ``struct path`` in the ``struct nameidata``, and
+drops the unneeded references.
 
 This "hand-over-hand" sequencing of getting a reference to the new
 dentry before dropping the reference to the previous dentry may
-- 
2.31.1