static struct fuse_dev *fuse_get_dev(struct file *file)
{
	/*
	 * Lockless access is OK, because file->private data is set
	 * once during mount and is valid until the file is released.
	 */
	return READ_ONCE(file->private_data);
}
static struct fuse_dev *fuse_get_dev(struct file *file)
{
	 
	return READ_ONCE(file->private_data);
}