linux-kernel - [PATCH 3.4 104/176] sysfs.h: add ATTRIBUTE

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Message-Id: <1428569224-23820-104-git-send-email-lizf@kernel.org>
Date:	Thu,  9 Apr 2015 16:45:52 +0800
From:	lizf@...nel.org
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Zefan Li <lizefan@...wei.com>
Subject: [PATCH 3.4 104/176] sysfs.h: add ATTRIBUTE_GROUPS() macro

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

3.4.107-rc1 review patch.  If anyone has any objections, please let me know.

------------------


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@...ck-us.net>
Tested-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Zefan Li <lizefan@...wei.com>
---
 include/linux/sysfs.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index 0010009..caf2e56 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;
-- 
1.9.1

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