+static ssize_t blkdev_aio_read(struct kiocb *iocb, const struct iovec *iov,
+ unsigned long nr_segs, loff_t pos)
+{
+ struct file *file = iocb->ki_filp;
+ struct inode *bd_inode = file->f_mapping->host;
+ loff_t size = i_size_read(bd_inode);
+
+ if (pos >= size)
+ return 0;
+
+ size -= pos;
+ if (size < INT_MAX)
+ nr_segs = iov_shorten((struct iovec *)iov, nr_segs, size);
+ return generic_file_aio_read(iocb, iov, nr_segs, pos);
+}
+