[PATCH 3.2 111/152] sysfs.h: add ATTRIBUTE_GROUPS() macro

Ben Hutchings
2015-02-17T01:46:53Z

From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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: Ben Hutchings <ben@decadent.org.uk>
---
include/linux/sysfs.h | 9 +++++++++
1 file changed, 9 insertions(+)

--- 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;