4 files changed, 9 insertions, 28 deletions

diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
index 5ed8e58d7bfc..bbcb98e7fcc6 100644
--- a/fs/notify/fanotify/fanotify_user.c
+++ b/fs/notify/fanotify/fanotify_user.c
@@ -433,6 +433,7 @@ static const struct file_operations fanotify_fops = {
 	.release	= fanotify_release,
 	.unlocked_ioctl	= fanotify_ioctl,
 	.compat_ioctl	= fanotify_ioctl,
+	.llseek		= noop_llseek,
 };
 
 static void fanotify_free_mark(struct fsnotify_mark *fsn_mark)
diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index 36802420d69a..4498a208df94 100644
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -88,8 +88,6 @@ void __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask)
 {
 	struct dentry *parent;
 	struct inode *p_inode;
-	bool send = false;
-	bool should_update_children = false;
 
 	if (!dentry)
 		dentry = path->dentry;
@@ -97,29 +95,12 @@ void __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask)
 	if (!(dentry->d_flags & DCACHE_FSNOTIFY_PARENT_WATCHED))
 		return;
 
-	spin_lock(&dentry->d_lock);
-	parent = dentry->d_parent;
+	parent = dget_parent(dentry);
 	p_inode = parent->d_inode;
 
-	if (fsnotify_inode_watches_children(p_inode)) {
-		if (p_inode->i_fsnotify_mask & mask) {
-			dget(parent);
-			send = true;
-		}
-	} else {
-		/*
-		 * The parent doesn't care about events on it's children but
-		 * at least one child thought it did.  We need to run all the
-		 * children and update their d_flags to let them know p_inode
-		 * doesn't care about them any more.
-		 */
-		dget(parent);
-		should_update_children = true;
-	}
-
-	spin_unlock(&dentry->d_lock);
-
-	if (send) {
+	if (unlikely(!fsnotify_inode_watches_children(p_inode)))
+		__fsnotify_update_child_dentry_flags(p_inode);
+	else if (p_inode->i_fsnotify_mask & mask) {
 		/* we are notifying a parent so come up with the new mask which
 		 * specifies these are events which came from a child. */
 		mask |= FS_EVENT_ON_CHILD;
@@ -130,13 +111,9 @@ void __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask)
 		else
 			fsnotify(p_inode, mask, dentry->d_inode, FSNOTIFY_EVENT_INODE,
 				 dentry->d_name.name, 0);
-		dput(parent);
 	}
 
-	if (unlikely(should_update_children)) {
-		__fsnotify_update_child_dentry_flags(p_inode);
-		dput(parent);
-	}
+	dput(parent);
 }
 EXPORT_SYMBOL_GPL(__fsnotify_parent);
 
diff --git a/fs/notify/inode_mark.c b/fs/notify/inode_mark.c
index 33297c005060..21ed10660b80 100644
--- a/fs/notify/inode_mark.c
+++ b/fs/notify/inode_mark.c
@@ -240,6 +240,7 @@ void fsnotify_unmount_inodes(struct list_head *list)
 {
 	struct inode *inode, *next_i, *need_iput = NULL;
 
+	spin_lock(&inode_lock);
 	list_for_each_entry_safe(inode, next_i, list, i_sb_list) {
 		struct inode *need_iput_tmp;
 
@@ -297,4 +298,5 @@ void fsnotify_unmount_inodes(struct list_head *list)
 
 		spin_lock(&inode_lock);
 	}
+	spin_unlock(&inode_lock);
 }
diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c
index bf7f6d776c31..24edc1185d53 100644
--- a/fs/notify/inotify/inotify_user.c
+++ b/fs/notify/inotify/inotify_user.c
@@ -344,6 +344,7 @@ static const struct file_operations inotify_fops = {
 	.release	= inotify_release,
 	.unlocked_ioctl	= inotify_ioctl,
 	.compat_ioctl	= inotify_ioctl,
+	.llseek		= noop_llseek,
 };