From 38457ab3a0d36320370c715145ba6da514127194 Mon Sep 17 00:00:00 2001
From: Andi Kleen <andi@firstfloor.org>
Date: Tue, 5 Jan 2010 12:48:02 +0100
Subject: sysfs: Add attribute array to sysdev classes

Add a attribute array that is automatically registered and unregistered
to struct sysdev_class. This is similar to what struct class has.

A lot of drivers add list of attributes, so it's better to do
this easily in the common sysdev layer.

This adds a new field to struct sysdev_class. I audited the
whole tree and there are no dynamically allocated sysdev classes,
so this is fully compatible.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
 drivers/base/sys.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'drivers/base/sys.c')

diff --git a/drivers/base/sys.c b/drivers/base/sys.c
index a38445c..747c99e 100644
--- a/drivers/base/sys.c
+++ b/drivers/base/sys.c
@@ -145,13 +145,20 @@ int sysdev_class_register(struct sysdev_class *cls)
 	if (retval)
 		return retval;
 
-	return kset_register(&cls->kset);
+	retval = kset_register(&cls->kset);
+	if (!retval && cls->attrs)
+		retval = sysfs_create_files(&cls->kset.kobj,
+					    (const struct attribute **)cls->attrs);
+	return retval;
 }
 
 void sysdev_class_unregister(struct sysdev_class *cls)
 {
 	pr_debug("Unregistering sysdev class '%s'\n",
 		 kobject_name(&cls->kset.kobj));
+	if (cls->attrs)
+		sysfs_remove_files(&cls->kset.kobj,
+				   (const struct attribute **)cls->attrs);
 	kset_unregister(&cls->kset);
 }
 
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