fuse_file_aio_read(): convert to ->read_iter()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/fuse/file.c

@@ -933,8 +933,7 @@ static int fuse_readpages(struct file *file, struct address_space *mapping,
 	return err;
 }
 
-static ssize_t fuse_file_aio_read(struct kiocb *iocb, const struct iovec *iov,
-				  unsigned long nr_segs, loff_t pos)
+static ssize_t fuse_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
 {
 	struct inode *inode = iocb->ki_filp->f_mapping->host;
 	struct fuse_conn *fc = get_fuse_conn(inode);
@@ -945,14 +944,14 @@ static ssize_t fuse_file_aio_read(struct kiocb *iocb, const struct iovec *iov,
 	 * i_size is up to date).
 	 */
 	if (fc->auto_inval_data ||
-	    (pos + iov_length(iov, nr_segs) > i_size_read(inode))) {
+	    (iocb->ki_pos + iov_iter_count(to) > i_size_read(inode))) {
 		int err;
 		err = fuse_update_attributes(inode, NULL, iocb->ki_filp, NULL);
 		if (err)
 			return err;
 	}
 
-	return generic_file_aio_read(iocb, iov, nr_segs, pos);
+	return generic_file_read_iter(iocb, to);
 }
 
 static void fuse_write_fill(struct fuse_req *req, struct fuse_file *ff,
@@ -3038,8 +3037,8 @@ static long fuse_file_fallocate(struct file *file, int mode, loff_t offset,
 
 static const struct file_operations fuse_file_operations = {
 	.llseek		= fuse_file_llseek,
-	.read		= do_sync_read,
-	.aio_read	= fuse_file_aio_read,
+	.read		= new_sync_read,
+	.read_iter	= fuse_file_read_iter,
 	.write		= do_sync_write,
 	.aio_write	= fuse_file_aio_write,
 	.mmap		= fuse_file_mmap,