v4.19.13 snapshot.
diff --git a/include/linux/iio/kfifo_buf.h b/include/linux/iio/kfifo_buf.h
new file mode 100644
index 0000000..764659e
--- /dev/null
+++ b/include/linux/iio/kfifo_buf.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LINUX_IIO_KFIFO_BUF_H__
+#define __LINUX_IIO_KFIFO_BUF_H__
+
+struct iio_buffer;
+struct device;
+
+struct iio_buffer *iio_kfifo_allocate(void);
+void iio_kfifo_free(struct iio_buffer *r);
+
+struct iio_buffer *devm_iio_kfifo_allocate(struct device *dev);
+void devm_iio_kfifo_free(struct device *dev, struct iio_buffer *r);
+
+#endif