Merge tag 'v4.7-rc6' into patchwork

Linux 4.7-rc6

* tag 'v4.7-rc6': (1245 commits)
  Linux 4.7-rc6
  ovl: warn instead of error if d_type is not supported
  MIPS: Fix possible corruption of cache mode by mprotect.
  locks: use file_inode()
  usb: dwc3: st: Use explicit reset_control_get_exclusive() API
  phy: phy-stih407-usb: Use explicit reset_control_get_exclusive() API
  phy: miphy28lp: Inform the reset framework that our reset line may be shared
  namespace: update event counter when umounting a deleted dentry
  9p: use file_dentry()
  lockd: unregister notifier blocks if the service fails to come up completely
  ACPI,PCI,IRQ: correct operator precedence
  fuse: serialize dirops by default
  drm/i915: Fix missing unlock on error in i915_ppgtt_info()
  powerpc: Initialise pci_io_base as early as possible
  mfd: da9053: Fix compiler warning message for uninitialised variable
  mfd: max77620: Fix FPS switch statements
  phy: phy-stih407-usb: Inform the reset framework that our reset line may be shared
  usb: dwc3: st: Inform the reset framework that our reset line may be shared
  usb: host: ehci-st: Inform the reset framework that our reset line may be shared
  usb: host: ohci-st: Inform the reset framework that our reset line may be shared
  ...

1 files changed, 53 insertions, 0 deletions

diff --git a/include/linux/reservation.h b/include/linux/reservation.h
index 49d057655d62..b0f305e77b7f 100644
--- a/include/linux/reservation.h
+++ b/include/linux/reservation.h
@@ -49,12 +49,27 @@ extern struct ww_class reservation_ww_class;
 extern struct lock_class_key reservation_seqcount_class;
 extern const char reservation_seqcount_string[];
 
+/**
+ * struct reservation_object_list - a list of shared fences
+ * @rcu: for internal use
+ * @shared_count: table of shared fences
+ * @shared_max: for growing shared fence table
+ * @shared: shared fence table
+ */
 struct reservation_object_list {
 	struct rcu_head rcu;
 	u32 shared_count, shared_max;
 	struct fence __rcu *shared[];
 };
 
+/**
+ * struct reservation_object - a reservation object manages fences for a buffer
+ * @lock: update side lock
+ * @seq: sequence count for managing RCU read-side synchronization
+ * @fence_excl: the exclusive fence, if there is one currently
+ * @fence: list of current shared fences
+ * @staged: staged copy of shared fences for RCU updates
+ */
 struct reservation_object {
 	struct ww_mutex lock;
 	seqcount_t seq;
@@ -68,6 +83,10 @@ struct reservation_object {
 #define reservation_object_assert_held(obj) \
 	lockdep_assert_held(&(obj)->lock.base)
 
+/**
+ * reservation_object_init - initialize a reservation object
+ * @obj: the reservation object
+ */
 static inline void
 reservation_object_init(struct reservation_object *obj)
 {
@@ -79,6 +98,10 @@ reservation_object_init(struct reservation_object *obj)
 	obj->staged = NULL;
 }
 
+/**
+ * reservation_object_fini - destroys a reservation object
+ * @obj: the reservation object
+ */
 static inline void
 reservation_object_fini(struct reservation_object *obj)
 {
@@ -106,6 +129,14 @@ reservation_object_fini(struct reservation_object *obj)
 	ww_mutex_destroy(&obj->lock);
 }
 
+/**
+ * reservation_object_get_list - get the reservation object's
+ * shared fence list, with update-side lock held
+ * @obj: the reservation object
+ *
+ * Returns the shared fence list.  Does NOT take references to
+ * the fence.  The obj->lock must be held.
+ */
 static inline struct reservation_object_list *
 reservation_object_get_list(struct reservation_object *obj)
 {
@@ -113,6 +144,17 @@ reservation_object_get_list(struct reservation_object *obj)
 					 reservation_object_held(obj));
 }
 
+/**
+ * reservation_object_get_excl - get the reservation object's
+ * exclusive fence, with update-side lock held
+ * @obj: the reservation object
+ *
+ * Returns the exclusive fence (if any).  Does NOT take a
+ * reference.  The obj->lock must be held.
+ *
+ * RETURNS
+ * The exclusive fence or NULL
+ */
 static inline struct fence *
 reservation_object_get_excl(struct reservation_object *obj)
 {
@@ -120,6 +162,17 @@ reservation_object_get_excl(struct reservation_object *obj)
 					 reservation_object_held(obj));
 }
 
+/**
+ * reservation_object_get_excl_rcu - get the reservation object's
+ * exclusive fence, without lock held.
+ * @obj: the reservation object
+ *
+ * If there is an exclusive fence, this atomically increments it's
+ * reference count and returns it.
+ *
+ * RETURNS
+ * The exclusive fence or NULL if none
+ */
 static inline struct fence *
 reservation_object_get_excl_rcu(struct reservation_object *obj)
 {