linux-kernel - [PATCH 1/2] docs/sysfs: Update directory/kobject documentation.

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Message-Id: <201012211309.23159.bvanassche@acm.org>
Date:	Tue, 21 Dec 2010 13:09:23 +0100
From:	Bart Van Assche <bvanassche@....org>
To:	linux-kernel@...r.kernel.org
Cc:	"Greg Kroah-Hartman" <gregkh@...e.de>, Tejun Heo <tj@...nel.org>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>
Subject: [PATCH 1/2] docs/sysfs: Update directory/kobject documentation.

Some time ago the way how sysfs stores a pointer to a kobject
corresponding to a directory was modified. This patch brings the
documentation again in sync with the implementation.

Signed-off-by: Bart Van Assche <bvanassche@....org>
Cc: Greg KH <greg@...ah.com>
Cc: Tejun Heo <tj@...nel.org>
Cc: Dmitry Torokhov <dmitry.torokhov@...il.com>
---
 Documentation/filesystems/sysfs.txt |   10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/Documentation/filesystems/sysfs.txt b/Documentation/filesystems/sysfs.txt
index 5d1335f..2ed95f9 100644
--- a/Documentation/filesystems/sysfs.txt
+++ b/Documentation/filesystems/sysfs.txt
@@ -39,10 +39,12 @@ userspace. Top-level directories in sysfs represent the common
 ancestors of object hierarchies; i.e. the subsystems the objects
 belong to. 
 
-Sysfs internally stores the kobject that owns the directory in the
-->d_fsdata pointer of the directory's dentry. This allows sysfs to do
-reference counting directly on the kobject when the file is opened and
-closed. 
+Sysfs internally stores a pointer to the kobject that implements a
+directory in the sysfs_dirent object associated with the directory. In
+the past this kobject pointer has been used by sysfs to do reference
+counting directly on the kobject whenever the file is opened or closed.
+With the current sysfs implementation the kobject reference count is
+only modified directly by the function sysfs_schedule_callback().
 
 
 Attributes
-- 
1.7.1

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