linux-kernel - [PATCH 3/3] sysfs: Document struct attribute

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Message-Id: <1421703806-29791-4-git-send-email-linux@roeck-us.net>
Date:	Mon, 19 Jan 2015 13:43:26 -0800
From:	Guenter Roeck <linux@...ck-us.net>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Vivien Didelot <vivien.didelot@...oirfairelinux.com>,
	linux-kernel@...r.kernel.org, Guenter Roeck <linux@...ck-us.net>
Subject: [PATCH 3/3] sysfs: Document struct attribute_group

Document variables defined in struct attribute_group to ensure
correct usage.

Signed-off-by: Guenter Roeck <linux@...ck-us.net>
---
 include/linux/sysfs.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index ddad161..99382c0 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -57,6 +57,21 @@ do {							\
 #define sysfs_attr_init(attr) do {} while (0)
 #endif
 
+/**
+ * struct attribute_group - data structure used to declare an attribute group.
+ * @name:	Optional: Attribute group name
+ *		If specified, the attribute group will be created in
+ *		a new subdirectory with this name.
+ * @is_visible:	Optional: Function to return permissions associated with an
+ *		attribute of the group. Will be called repeatedly for each
+ *		attribute in the group. Only read/write permissions as well as
+ *		SYSFS_PREALLOC are accepted. Must return 0 if an attribute is
+ *		not visible. The returned value will replace static permissions
+ *		defined in struct attribute or struct bin_attribute.
+ * @attrs:	Pointer to NULL terminated list of attributes.
+ * @bin_attrs:	Pointer to NULL terminated list of binary attributes.
+ *		Either attrs or bin_attrs or both must be provided.
+ */
 struct attribute_group {
 	const char		*name;
 	umode_t			(*is_visible)(struct kobject *,
-- 
2.1.0

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