diff --git a/include/linux/libata.h b/include/linux/libata.h
index c6883ba8cba9..0f8e3720edd9 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -682,6 +682,11 @@ static inline unsigned int ata_class_disabled(unsigned int class)
 	return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP;
 }
 
+static inline unsigned int ata_class_absent(unsigned int class)
+{
+	return !ata_class_enabled(class) && !ata_class_disabled(class);
+}
+
 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
 {
 	return ata_class_enabled(dev->class);
@@ -692,6 +697,11 @@ static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
 	return ata_class_disabled(dev->class);
 }
 
+static inline unsigned int ata_dev_absent(const struct ata_device *dev)
+{
+	return ata_class_absent(dev->class);
+}
+
 static inline u8 ata_chk_status(struct ata_port *ap)
 {
 	return ap->ops->check_status(ap);