gfs2: Remove inode from ordered write list in gfs2_write_inode()

The vfs clears the I_DIRTY inode flag before calling gfs2_write_inode()
having queued any data that needed to be written to disk.
This is a good time to remove such inodes from our ordered write list
so they don't hang around for long periods of time.
Signed-off-by: Abhi Das <adas@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>

fs/gfs2/super.c

@@ -768,6 +768,12 @@ static int gfs2_write_inode(struct inode *inode, struct writeback_control *wbc)
 		ret = filemap_fdatawait(metamapping);
 	if (ret)
 		mark_inode_dirty_sync(inode);
+	else {
+		spin_lock(&inode->i_lock);
+		if (!(inode->i_flags & I_DIRTY))
+			gfs2_ordered_del_inode(ip);
+		spin_unlock(&inode->i_lock);
+	}
 	return ret;
 }