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Subject[PATCH 09/62] sysfs: Add attribute array to sysdev classes
Date
From: Andi Kleen <andi@firstfloor.org>

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 ++++++++-
include/linux/sysdev.h | 2 ++
2 files changed, 10 insertions(+), 1 deletions(-)

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);
}

diff --git a/include/linux/sysdev.h b/include/linux/sysdev.h
index c2458fa..b6244f9 100644
--- a/include/linux/sysdev.h
+++ b/include/linux/sysdev.h
@@ -27,10 +27,12 @@


struct sys_device;
+struct sysdev_class_attribute;

struct sysdev_class {
const char *name;
struct list_head drivers;
+ struct sysdev_class_attribute **attrs;

/* Default operations for these types of devices */
int (*shutdown)(struct sys_device *);
--
1.7.0.1


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