Merge tag 'driver-core-4.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core updates from Greg KH:
 "Here's the driver-core / kobject / lz4 tree update for 4.1-rc1.

  Everything here has been in linux-next for a while with no reported
  issues.  It's mostly just coding style cleanups, with other minor
  changes in here as well, nothing big"

* tag 'driver-core-4.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (32 commits)
  debugfs: allow bad parent pointers to be passed in
  stable_kernel_rules: Add clause about specification of kernel versions to patch.
  kobject: WARN as tip when call kobject_get() to a kobject not initialized
  lib/lz4: Pull out constant tables
  drivers: platform: parse IRQ flags from resources
  driver core: Make probe deferral more quiet
  drivers/core/of: Add symlink to device-tree from devices with an OF node
  device: Add dev_of_node() accessor
  drivers: base: fw: fix ret value when loading fw
  firmware: Avoid manual device_create_file() calls
  drivers/base: cacheinfo: validate device node for all the caches
  drivers/base: use tabs where possible in code indentation
  driver core: add missing blank line after declaration
  drivers: base: node: Delete space after pointer declaration
  drivers: base: memory: Use tabs instead of spaces
  firmware_class: Fix whitespace and indentation
  drivers: base: dma-mapping: Erase blank space after pointer
  drivers: base: class: Add a blank line after declarations
  attribute_container: fix missing blank lines after declarations
  drivers: base: memory: Fix switch indent
  ...

2 files changed, 22 insertions, 0 deletions

diff --git a/include/linux/device.h b/include/linux/device.h
index 0eb8ee2dc6d1..f3f2c7e38060 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -916,6 +916,13 @@ static inline void device_lock_assert(struct device *dev)
         lockdep_assert_held(&dev->mutex);
 }
 
+static inline struct device_node *dev_of_node(struct device *dev)
+{
+        if (!IS_ENABLED(CONFIG_OF))
+                return NULL;
+        return dev->of_node;
+}
+
 void driver_init(void);
 
 /*
diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index ddad16148bd6..99382c0df17e 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 *,