fs/block_dev.c: switch to ->read_iter()

}

EXPORT_SYMBOL_GPL(blkdev_aio_write);

static ssize_t blkdev_aio_read(struct kiocb *iocb, const struct iovec *iov,

			 unsigned long nr_segs, loff_t pos)

static ssize_t blkdev_read_iter(struct kiocb *iocb, struct iov_iter *to)

{

	struct file *file = iocb->ki_filp;

	struct inode *bd_inode = file->f_mapping->host;

	loff_t size = i_size_read(bd_inode);

	size_t count = iocb->ki_nbytes;

	struct iov_iter to;

	iov_iter_init(&to, READ, iov, nr_segs, count);

	loff_t pos = iocb->ki_pos;

	if (pos >= size)

		return 0;

	size -= pos;

	iov_iter_truncate(&to, size);

	return generic_file_read_iter(iocb, &to);

	iov_iter_truncate(to, size);

	return generic_file_read_iter(iocb, to);

}

/*

	.open		= blkdev_open,

	.release	= blkdev_close,

	.llseek		= block_llseek,

	.read		= do_sync_read,

	.read		= new_sync_read,

	.write		= do_sync_write,

	.aio_read	= blkdev_aio_read,

	.read_iter	= blkdev_read_iter,

	.aio_write	= blkdev_aio_write,

	.mmap		= generic_file_mmap,

	.fsync		= blkdev_fsync,