diff --git a/drivers/ata/sata_sx4.c b/drivers/ata/sata_sx4.c
index 8c74f2f..ae7992d 100644
--- a/drivers/ata/sata_sx4.c
+++ b/drivers/ata/sata_sx4.c
@@ -152,7 +152,7 @@
 
 
 static int pdc_sata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
-static irqreturn_t pdc20621_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
+static irqreturn_t pdc20621_interrupt (int irq, void *dev_instance);
 static void pdc_eng_timeout(struct ata_port *ap);
 static void pdc_20621_phy_reset (struct ata_port *ap);
 static int pdc_port_start(struct ata_port *ap);
@@ -788,7 +788,7 @@
 	readl(mmio + PDC_20621_SEQMASK);
 }
 
-static irqreturn_t pdc20621_interrupt (int irq, void *dev_instance, struct pt_regs *regs)
+static irqreturn_t pdc20621_interrupt (int irq, void *dev_instance)
 {
 	struct ata_host *host = dev_instance;
 	struct ata_port *ap;