diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index b4d7710..bb4f5fb 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -581,7 +581,7 @@
  * Callable only from contexts that can sleep.
  */
 static inline int
-spi_write(struct spi_device *spi, const u8 *buf, size_t len)
+spi_write(struct spi_device *spi, const void *buf, size_t len)
 {
 	struct spi_transfer	t = {
 			.tx_buf		= buf,
@@ -605,7 +605,7 @@
  * Callable only from contexts that can sleep.
  */
 static inline int
-spi_read(struct spi_device *spi, u8 *buf, size_t len)
+spi_read(struct spi_device *spi, void *buf, size_t len)
 {
 	struct spi_transfer	t = {
 			.rx_buf		= buf,
@@ -620,8 +620,8 @@
 
 /* this copies txbuf and rxbuf data; for small transfers only! */
 extern int spi_write_then_read(struct spi_device *spi,
-		const u8 *txbuf, unsigned n_tx,
-		u8 *rxbuf, unsigned n_rx);
+		const void *txbuf, unsigned n_tx,
+		void *rxbuf, unsigned n_rx);
 
 /**
  * spi_w8r8 - SPI synchronous 8 bit write followed by 8 bit read