diff --git a/common/cmd_ide.c b/common/cmd_ide.c
index ebc080c72..2e185cc44 100644
--- a/common/cmd_ide.c
+++ b/common/cmd_ide.c
@@ -188,7 +188,7 @@ static void ident_cpy (unsigned char *dest, unsigned char *src, unsigned int len
 
 #ifdef CONFIG_ATAPI
 static void	atapi_inquiry(block_dev_desc_t *dev_desc);
-ulong atapi_read (int device, lbaint_t blknr, ulong blkcnt, ulong *buffer);
+ulong atapi_read (int device, lbaint_t blknr, ulong blkcnt, void *buffer);
 #endif
 
 
@@ -1233,7 +1233,7 @@ static void ide_ident (block_dev_desc_t *dev_desc)
 
 /* ------------------------------------------------------------------------- */
 
-ulong ide_read (int device, lbaint_t blknr, ulong blkcnt, ulong *buffer)
+ulong ide_read (int device, lbaint_t blknr, ulong blkcnt, void *buffer)
 {
 	ulong n = 0;
 	unsigned char c;
@@ -1353,7 +1353,7 @@ IDE_READ_E:
 /* ------------------------------------------------------------------------- */
 
 
-ulong ide_write (int device, lbaint_t blknr, ulong blkcnt, ulong *buffer)
+ulong ide_write (int device, lbaint_t blknr, ulong blkcnt, void *buffer)
 {
 	ulong n = 0;
 	unsigned char c;
@@ -2015,7 +2015,7 @@ static void	atapi_inquiry(block_dev_desc_t * dev_desc)
 #define ATAPI_READ_BLOCK_SIZE	2048	/* assuming CD part */
 #define ATAPI_READ_MAX_BLOCK ATAPI_READ_MAX_BYTES/ATAPI_READ_BLOCK_SIZE	/* max blocks */
 
-ulong atapi_read (int device, lbaint_t blknr, ulong blkcnt, ulong *buffer)
+ulong atapi_read (int device, lbaint_t blknr, ulong blkcnt, void *buffer)
 {
 	ulong n = 0;
 	unsigned char ccb[12]; /* Command descriptor block */
diff --git a/common/cmd_scsi.c b/common/cmd_scsi.c
index b17bebbac..da36ed9e1 100644
--- a/common/cmd_scsi.c
+++ b/common/cmd_scsi.c
@@ -74,7 +74,7 @@ void scsi_setup_inquiry(ccb * pccb);
 void scsi_ident_cpy (unsigned char *dest, unsigned char *src, unsigned int len);
 
 
-ulong scsi_read(int device, ulong blknr, ulong blkcnt, ulong *buffer);
+ulong scsi_read(int device, ulong blknr, ulong blkcnt, void *buffer);
 
 
 /*********************************************************************************
@@ -424,7 +424,7 @@ int do_scsi (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 
 #define SCSI_MAX_READ_BLK 0xFFFF /* almost the maximum amount of the scsi_ext command.. */
 
-ulong scsi_read(int device, ulong blknr, ulong blkcnt, ulong *buffer)
+ulong scsi_read(int device, ulong blknr, ulong blkcnt, void *buffer)
 {
 	ulong start,blks, buf_addr;
 	unsigned short smallblks;
diff --git a/common/usb_storage.c b/common/usb_storage.c
index b4b791408..196ceb735 100644
--- a/common/usb_storage.c
+++ b/common/usb_storage.c
@@ -169,7 +169,7 @@ static struct us_data usb_stor[USB_MAX_STOR_DEV];
 
 int usb_stor_get_info(struct usb_device *dev, struct us_data *us, block_dev_desc_t *dev_desc);
 int usb_storage_probe(struct usb_device *dev, unsigned int ifnum,struct us_data *ss);
-unsigned long usb_stor_read(int device, unsigned long blknr, unsigned long blkcnt, unsigned long *buffer);
+unsigned long usb_stor_read(int device, unsigned long blknr, unsigned long blkcnt, void *buffer);
 struct usb_device * usb_get_dev_index(int index);
 void uhci_show_temp_int_td(void);
 
@@ -941,7 +941,7 @@ static void usb_bin_fixup(struct usb_device_descriptor descriptor,
 
 #define USB_MAX_READ_BLK 20
 
-unsigned long usb_stor_read(int device, unsigned long blknr, unsigned long blkcnt, unsigned long *buffer)
+unsigned long usb_stor_read(int device, unsigned long blknr, unsigned long blkcnt, void *buffer)
 {
 	unsigned long start,blks, buf_addr;
 	unsigned short smallblks;
diff --git a/cpu/pxa/mmc.c b/cpu/pxa/mmc.c
index c57d0d5c3..0fbaa162f 100644
--- a/cpu/pxa/mmc.c
+++ b/cpu/pxa/mmc.c
@@ -363,7 +363,7 @@ mmc_write(uchar *src, ulong dst, int size)
 
 ulong
 /****************************************************/
-mmc_bread(int dev_num, ulong blknr, ulong blkcnt, ulong *dst)
+mmc_bread(int dev_num, ulong blknr, ulong blkcnt, void *dst)
 /****************************************************/
 {
 	int mmc_block_size = MMC_BLOCK_SIZE;
diff --git a/drivers/systemace.c b/drivers/systemace.c
index 3f329f970..9502623a7 100644
--- a/drivers/systemace.c
+++ b/drivers/systemace.c
@@ -73,8 +73,7 @@
 /* */
 
 static unsigned long systemace_read(int dev, unsigned long start,
-                                    unsigned long blkcnt,
-                                    unsigned long *buffer);
+                                    unsigned long blkcnt, void *buffer);
 
 static block_dev_desc_t systemace_dev = { 0 };
 
@@ -133,11 +132,11 @@ block_dev_desc_t *systemace_get_dev(int dev)
  * number of blocks read. A zero return indicates an error.
  */
 static unsigned long systemace_read(int dev, unsigned long start,
-                                    unsigned long blkcnt, unsigned long *buffer)
+                                    unsigned long blkcnt, void *buffer)
 {
 	int retry;
 	unsigned blk_countdown;
-	unsigned char *dp = (unsigned char *)buffer;
+	unsigned char *dp = buffer;
 	unsigned val;
 
 	if (get_cf_lock() < 0) {
diff --git a/include/ide.h b/include/ide.h
index e29ed36de..6976a6c31 100644
--- a/include/ide.h
+++ b/include/ide.h
@@ -49,7 +49,7 @@ typedef ulong lbaint_t;
  */
 
 void ide_init(void);
-ulong ide_read(int device, lbaint_t blknr, ulong blkcnt, ulong *buffer);
-ulong ide_write(int device, lbaint_t blknr, ulong blkcnt, ulong *buffer);
+ulong ide_read(int device, lbaint_t blknr, ulong blkcnt, void *buffer);
+ulong ide_write(int device, lbaint_t blknr, ulong blkcnt, void *buffer);
 
 #endif /* _IDE_H */
diff --git a/include/part.h b/include/part.h
index 4f5a57079..29c03205f 100644
--- a/include/part.h
+++ b/include/part.h
@@ -44,7 +44,7 @@ typedef struct block_dev_desc {
 	unsigned long	(*block_read)(int dev,
 				      unsigned long start,
 				      lbaint_t blkcnt,
-				      unsigned long *buffer);
+				      void *buffer);
 	unsigned long	(*block_write)(int dev,
 				       unsigned long start,
 				       lbaint_t blkcnt,