From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Sun, 14 Jul 2013 23:05:52 +0000 (-0700)
Subject: sysfs.h: add ATTRIBUTE_GROUPS() macro
X-Git-Tag: v3.4.107~74
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=aa12b754cfbd5b5c900d43a6a215b096d8afc0ee;p=thirdparty%2Fkernel%2Fstable.git

sysfs.h: add ATTRIBUTE_GROUPS() macro

commit f2f37f58b1b933b06d6d84e80a31a1b500fb0db2 upstream.

To make it easier for driver subsystems to work with attribute groups,
create the ATTRIBUTE_GROUPS macro to remove some of the repetitive
typing for the most common use for attribute groups.

Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Zefan Li <lizefan@huawei.com>
---

diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index 0010009b2f001..caf2e56bdf21b 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -80,6 +80,15 @@ struct attribute_group {
 
 #define __ATTR_NULL { .attr = { .name = NULL } }
 
+#define ATTRIBUTE_GROUPS(name)					\
+static const struct attribute_group name##_group = {		\
+	.attrs = name##_attrs,					\
+};								\
+static const struct attribute_group *name##_groups[] = {	\
+	&name##_group,						\
+	NULL,							\
+}
+
 #define attr_name(_attr) (_attr).attr.name
 
 struct file;