sysfs: add more helper macro's for (bin_)attribute(_groups)

With the recent changes to sysfs there's various helper macro's.
However there's no RW, RO BIN_ helper macro's. This patch adds them.

Signed-off-by: Oliver Schinagl <oliver@schinagl.nl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 38 insertions, 13 deletions

diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index 2c3b6a30697d..d907a7328025 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -17,6 +17,7 @@
 #include <linux/list.h>
 #include <linux/lockdep.h>
 #include <linux/kobject_ns.h>
+#include <linux/stat.h>
 #include <linux/atomic.h>
 
 struct kobject;
@@ -94,15 +95,18 @@ struct attribute_group {
 #define __ATTR_IGNORE_LOCKDEP   __ATTR
 #endif
 
-#define ATTRIBUTE_GROUPS(name)                                  \
-static const struct attribute_group name##_group = {            \
-        .attrs = name##_attrs,                                  \
-};                                                              \
-static const struct attribute_group *name##_groups[] = {        \
-        &name##_group,                                          \
+#define __ATTRIBUTE_GROUPS(_name)                               \
+static const struct attribute_group *_name##_groups[] = {       \
+        &_name##_group,                                         \
         NULL,                                                   \
 }
 
+#define ATTRIBUTE_GROUPS(_name)                                 \
+static const struct attribute_group _name##_group = {           \
+        .attrs = _name##_attrs,                                 \
+};                                                              \
+__ATTRIBUTE_GROUPS(_name)
+
 #define attr_name(_attr) (_attr).attr.name
 
 struct file;
@@ -132,15 +136,36 @@ struct bin_attribute {
  */
 #define sysfs_bin_attr_init(bin_attr) sysfs_attr_init(&(bin_attr)->attr)
 
-/* macro to create static binary attributes easier */
-#define BIN_ATTR(_name, _mode, _read, _write, _size)            \
-struct bin_attribute bin_attr_##_name = {                       \
-        .attr = {.name = __stringify(_name), .mode = _mode },   \
-        .read   = _read,                                        \
-        .write  = _write,                                       \
-        .size   = _size,                                        \
+/* macros to create static binary attributes easier */
+#define __BIN_ATTR(_name, _mode, _read, _write, _size) {                \
+        .attr = { .name = __stringify(_name), .mode = _mode },          \
+        .read   = _read,                                                \
+        .write  = _write,                                               \
+        .size   = _size,                                                \
+}
+
+#define __BIN_ATTR_RO(_name, _size) {                                   \
+        .attr   = { .name = __stringify(_name), .mode = S_IRUGO },      \
+        .read   = _name##_read,                                         \
+        .size   = _size,                                                \
 }
 
+#define __BIN_ATTR_RW(_name, _size) __BIN_ATTR(_name,                   \
+                                   (S_IWUSR | S_IRUGO), _name##_read,   \
+                                   _name##_write)
+
+#define __BIN_ATTR_NULL __ATTR_NULL
+
+#define BIN_ATTR(_name, _mode, _read, _write, _size)                    \
+struct bin_attribute bin_attr_##_name = __BIN_ATTR(_name, _mode, _read, \
+                                        _write, _size)
+
+#define BIN_ATTR_RO(_name, _size)                                       \
+struct bin_attribute bin_attr_##_name = __BIN_ATTR_RO(_name, _size)
+
+#define BIN_ATTR_RW(_name, _size)                                       \
+struct bin_attribute bin_attr_##_name = __BIN_ATTR_RW(_name, _size)
+
 struct sysfs_ops {
         ssize_t (*show)(struct kobject *, struct attribute *,char *);
         ssize_t (*store)(struct kobject *,struct attribute *,const char *, size_t);