fsnotify: use typedef fsnotify_connp_t for brevity

The object marks manipulation functions fsnotify_destroy_marks()
fsnotify_find_mark() and their helpers take an argument of type
struct fsnotify_mark_connector __rcu ** to dereference the connector
pointer. use a typedef to describe this type for brevity.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>

fs/notify/fsnotify.h

@@ -19,8 +19,8 @@ extern struct srcu_struct fsnotify_mark_srcu;
 extern int fsnotify_compare_groups(struct fsnotify_group *a,
 				   struct fsnotify_group *b);
 
-/* Destroy all marks connected via given connector */
-extern void fsnotify_destroy_marks(struct fsnotify_mark_connector __rcu **connp);
+/* Destroy all marks attached to an object via connector */
+extern void fsnotify_destroy_marks(fsnotify_connp_t *connp);
 /* run the list of all marks associated with inode and destroy them */
 static inline void fsnotify_clear_marks_by_inode(struct inode *inode)
 {

fs/notify/mark.c

@@ -436,10 +436,9 @@ int fsnotify_compare_groups(struct fsnotify_group *a, struct fsnotify_group *b)
 	return -1;
 }
 
-static int fsnotify_attach_connector_to_object(
-				struct fsnotify_mark_connector __rcu **connp,
-				struct inode *inode,
-				struct vfsmount *mnt)
+static int fsnotify_attach_connector_to_object(fsnotify_connp_t *connp,
+					       struct inode *inode,
+					       struct vfsmount *mnt)
 {
 	struct fsnotify_mark_connector *conn;
 
@@ -476,7 +475,7 @@ static int fsnotify_attach_connector_to_object(
  * they are sure list cannot go away under them.
  */
 static struct fsnotify_mark_connector *fsnotify_grab_connector(
-				struct fsnotify_mark_connector __rcu **connp)
+						fsnotify_connp_t *connp)
 {
 	struct fsnotify_mark_connector *conn;
 	int idx;
@@ -508,7 +507,7 @@ static int fsnotify_add_mark_list(struct fsnotify_mark *mark,
 {
 	struct fsnotify_mark *lmark, *last = NULL;
 	struct fsnotify_mark_connector *conn;
-	struct fsnotify_mark_connector __rcu **connp;
+	fsnotify_connp_t *connp;
 	int cmp;
 	int err = 0;
 
@@ -629,9 +628,8 @@ int fsnotify_add_mark(struct fsnotify_mark *mark, struct inode *inode,
  * Given a list of marks, find the mark associated with given group. If found
  * take a reference to that mark and return it, else return NULL.
  */
-struct fsnotify_mark *fsnotify_find_mark(
-				struct fsnotify_mark_connector __rcu **connp,
-				struct fsnotify_group *group)
+struct fsnotify_mark *fsnotify_find_mark(fsnotify_connp_t *connp,
+					 struct fsnotify_group *group)
 {
 	struct fsnotify_mark_connector *conn;
 	struct fsnotify_mark *mark;
@@ -697,8 +695,8 @@ void fsnotify_clear_marks_by_group(struct fsnotify_group *group,
 	}
 }
 
-/* Destroy all marks attached to inode / vfsmount */
-void fsnotify_destroy_marks(struct fsnotify_mark_connector __rcu **connp)
+/* Destroy all marks attached to an object via connector */
+void fsnotify_destroy_marks(fsnotify_connp_t *connp)
 {
 	struct fsnotify_mark_connector *conn;
 	struct fsnotify_mark *mark, *old_mark = NULL;

include/linux/fsnotify_backend.h

@@ -268,6 +268,8 @@ struct fsnotify_mark_connector {
 	struct hlist_head list;
 };
 
+typedef struct fsnotify_mark_connector __rcu *fsnotify_connp_t;
+
 /*
  * A mark is simply an object attached to an in core inode which allows an
  * fsnotify listener to indicate they are either no longer interested in events
@@ -394,9 +396,8 @@ extern void fsnotify_recalc_mask(struct fsnotify_mark_connector *conn);
 extern void fsnotify_init_mark(struct fsnotify_mark *mark,
 			       struct fsnotify_group *group);
 /* Find mark belonging to given group in the list of marks */
-extern struct fsnotify_mark *fsnotify_find_mark(
-				struct fsnotify_mark_connector __rcu **connp,
-				struct fsnotify_group *group);
+extern struct fsnotify_mark *fsnotify_find_mark(fsnotify_connp_t *connp,
+						struct fsnotify_group *group);
 /* attach the mark to the inode or vfsmount */
 extern int fsnotify_add_mark(struct fsnotify_mark *mark, struct inode *inode,
 			     struct vfsmount *mnt, int allow_dups);