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Subject[PATCH 3/5] driver core: class: add function to create /sys/class/<class>/foo directory
Date
This adds a new function class_kobject_create_and_add() that creates a
directory in the /sys/class/<class>.

This function is required to create the /sys/class/leds/triggers directory
that contains all available LED triggers.

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Dan Murphy <dmurphy@ti.com>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
---
drivers/base/class.c | 7 +++++++
include/linux/device.h | 3 +++
2 files changed, 10 insertions(+)

diff --git a/drivers/base/class.c b/drivers/base/class.c
index d8a6a58..f4c53e7 100644
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -104,6 +104,13 @@ void class_remove_file_ns(struct class *cls, const struct class_attribute *attr,
sysfs_remove_file_ns(&cls->p->subsys.kobj, &attr->attr, ns);
}

+struct kobject *class_kobject_create_and_add(const char *name,
+ struct class *cls)
+{
+ return kobject_create_and_add(name, &cls->p->subsys.kobj);
+}
+EXPORT_SYMBOL_GPL(class_kobject_create_and_add);
+
static struct class *class_get(struct class *cls)
{
if (cls)
diff --git a/include/linux/device.h b/include/linux/device.h
index 6717ade..335e901 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -505,6 +505,9 @@ static inline void class_remove_file(struct class *class,
return class_remove_file_ns(class, attr, NULL);
}

+struct kobject * __must_check class_kobject_create_and_add(const char *name,
+ struct class *cls);
+
/* Simple class attribute that is just a static string */
struct class_attribute_string {
struct class_attribute attr;
--
2.7.4
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