Merge tag 'driver-core-3.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core patches from Greg KH:
 "Here are some driver core patches for 3.11-rc2.  They aren't really
  bugfixes, but a bunch of new helper macros for drivers to properly
  create attribute groups, which drivers and subsystems need to fix up a
  ton of race issues with incorrectly creating sysfs files (binary and
  normal) after userspace has been told that the device is present.

  Also here is the ability to create binary files as attribute groups,
  to solve that race condition, which was impossible to do before this,
  so that's my fault the drivers were broken.

  The majority of the .c changes is indenting and moving code around a
  bit.  It affects no existing code, but allows the large backlog of 70+
  patches that I already have created to start flowing into the
  different subtrees, instead of having to live in my driver-core tree,
  causing merge nightmares in linux-next for the next few months.

  These were finalized too late for the -rc1 merge window, which is why
  they were didn't make that pull request, testing and review from
  others didn't happen until a few weeks ago, and then there's the whole
  distraction of the past few days, which prevented these from getting
  to you sooner, sorry about that.

  Oh, and there's a bugfix for the documentation build warning in here
  as well.  All of these have been in linux-next this week, with no
  reported problems"

* tag 'driver-core-3.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
  driver-core: fix new kernel-doc warning in base/platform.c
  sysfs: use file mode defines from stat.h
  sysfs: add more helper macro's for (bin_)attribute(_groups)
  driver core: add default groups to struct class
  driver core: Introduce device_create_groups
  sysfs: prevent warning when only using binary attributes
  sysfs: add support for binary attributes in groups
  driver core: device.h: add RW and RO attribute macros
  sysfs.h: add BIN_ATTR macro
  sysfs.h: add ATTRIBUTE_GROUPS() macro
  sysfs.h: add __ATTR_RW() macro

1 files changed, 55 insertions, 9 deletions

diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index e2cee22..9e8a9b5 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -17,10 +17,12 @@
 #include <linux/list.h>
 #include <linux/lockdep.h>
 #include <linux/kobject_ns.h>
+#include <linux/stat.h>
 #include <linux/atomic.h>
 
 struct kobject;
 struct module;
+struct bin_attribute;
 enum kobj_ns_type;
 
 struct attribute {
@@ -59,26 +61,28 @@ struct attribute_group {
 	umode_t			(*is_visible)(struct kobject *,
 					      struct attribute *, int);
 	struct attribute	**attrs;
+	struct bin_attribute	**bin_attrs;
 };
 
-
-
 /**
  * Use these macros to make defining attributes easier. See include/linux/device.h
  * for examples..
  */
 
-#define __ATTR(_name,_mode,_show,_store) { \
-	.attr = {.name = __stringify(_name), .mode = _mode },	\
-	.show	= _show,					\
-	.store	= _store,					\
+#define __ATTR(_name,_mode,_show,_store) { 				\
+	.attr = {.name = __stringify(_name), .mode = _mode },		\
+	.show	= _show,						\
+	.store	= _store,						\
 }
 
-#define __ATTR_RO(_name) { \
-	.attr	= { .name = __stringify(_name), .mode = 0444 },	\
-	.show	= _name##_show,					\
+#define __ATTR_RO(_name) {						\
+	.attr	= { .name = __stringify(_name), .mode = S_IRUGO },	\
+	.show	= _name##_show,						\
 }
 
+#define __ATTR_RW(_name) __ATTR(_name, (S_IWUSR | S_IRUGO),		\
+			 _name##_show, _name##_store)
+
 #define __ATTR_NULL { .attr = { .name = NULL } }
 
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
@@ -92,6 +96,18 @@ struct attribute_group {
 #define __ATTR_IGNORE_LOCKDEP	__ATTR
 #endif
 
+#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;
@@ -121,6 +137,36 @@ struct bin_attribute {
  */
 #define sysfs_bin_attr_init(bin_attr) sysfs_attr_init(&(bin_attr)->attr)
 
+/* 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);