on 2010-5-20 16:32, Christoph Hellwig wrote: > On Thu, May 20, 2010 at 03:21:50PM +0800, Miao Xie wrote: >> + if (!mapping->a_ops->readpage) >> + return -ENOEXEC; > > I don't think there's any instance of address_space operations without > a readpage method in btrfs. But, Btrfs is being developing. Maybe someone implement a instance of address_space without a readpage method in the future. So it is better to check it, just like ext4. Thanks -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
