diff --git a/include/linux/libata.h b/include/linux/libata.h
index 86a504f..66dce58 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -485,6 +485,8 @@
 extern int sata_std_hardreset(struct ata_port *ap, int verbose,
 			      unsigned int *class);
 extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes);
+extern int ata_dev_revalidate(struct ata_port *ap, struct ata_device *dev,
+			      int post_reset);
 extern void ata_port_disable(struct ata_port *);
 extern void ata_std_ports(struct ata_ioports *ioaddr);
 #ifdef CONFIG_PCI