diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c
index 5ec866b..cfa22e4 100644
--- a/drivers/scsi/ahci.c
+++ b/drivers/scsi/ahci.c
@@ -407,7 +407,7 @@
 		return 0xffffffffU;
 	}
 
-	return readl((void *) ap->ioaddr.scr_addr + (sc_reg * 4));
+	return readl((void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4));
 }
 
 
@@ -425,7 +425,7 @@
 		return;
 	}
 
-	writel(val, (void *) ap->ioaddr.scr_addr + (sc_reg * 4));
+	writel(val, (void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4));
 }
 
 static void ahci_phy_reset(struct ata_port *ap)
@@ -453,14 +453,14 @@
 
 static u8 ahci_check_status(struct ata_port *ap)
 {
-	void *mmio = (void *) ap->ioaddr.cmd_addr;
+	void __iomem *mmio = (void __iomem *) ap->ioaddr.cmd_addr;
 
 	return readl(mmio + PORT_TFDATA) & 0xFF;
 }
 
 static u8 ahci_check_err(struct ata_port *ap)
 {
-	void *mmio = (void *) ap->ioaddr.cmd_addr;
+	void __iomem *mmio = (void __iomem *) ap->ioaddr.cmd_addr;
 
 	return (readl(mmio + PORT_TFDATA) >> 8) & 0xFF;
 }