[PATCH v2 16/20] fsnotify: generalize fsnotify_detach_connector_from_object()

[Amir Goldstein <amir73il@gmail.com>]

Use helper fsnotify_connector_obj() helper to reduce object type
dependent code.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
---
 fs/notify/mark.c                 | 21 ++++++++-------------
 include/linux/fsnotify_backend.h |  1 +
 2 files changed, 9 insertions(+), 13 deletions(-)

diff --git a/fs/notify/mark.c b/fs/notify/mark.c
index 53bacbce1145..3b19ed700ac3 100644
--- a/fs/notify/mark.c
+++ b/fs/notify/mark.c
@@ -177,19 +177,14 @@ static void fsnotify_connector_destroy_workfn(struct work_struct *work)
 static struct inode *fsnotify_detach_connector_from_object(
 					struct fsnotify_mark_connector *conn)
 {
-	struct inode *inode = NULL;
-
-	if (conn->type == FSNOTIFY_OBJ_TYPE_INODE) {
-		inode = conn->inode;
-		rcu_assign_pointer(inode->i_fsnotify.marks, NULL);
-		inode->i_fsnotify.mask = 0;
-		conn->inode = NULL;
-		conn->type = FSNOTIFY_OBJ_TYPE_DETACHED;
-	} else if (conn->type == FSNOTIFY_OBJ_TYPE_VFSMOUNT) {
-		rcu_assign_pointer(real_mount(conn->mnt)->mnt_fsnotify.marks,
-				   NULL);
-		real_mount(conn->mnt)->mnt_fsnotify.mask = 0;
-		conn->mnt = NULL;
+	struct fsnotify_obj *obj = fsnotify_connector_obj(conn);
+	struct inode *inode = (conn->type == FSNOTIFY_OBJ_TYPE_INODE) ?
+			      conn->inode : NULL;
+
+	if (obj) {
+		rcu_assign_pointer(obj->marks, NULL);
+		obj->mask = 0;
+		conn->object = NULL;
 		conn->type = FSNOTIFY_OBJ_TYPE_DETACHED;
 	}
 
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index 9a908b96909e..abbd7311077f 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -275,6 +275,7 @@ struct fsnotify_mark_connector {
 	spinlock_t lock;
 	unsigned int type;	/* Type of object [lock] */
 	union {	/* Object pointer [lock] */
+		void *object;
 		struct inode *inode;
 		struct vfsmount *mnt;
 	};
-- 
2.7.4