diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h
index 663046463533..b1c9b52876f3 100644
--- a/include/scsi/scsi_cmnd.h
+++ b/include/scsi/scsi_cmnd.h
@@ -291,13 +291,6 @@ static inline sector_t scsi_get_lba(struct scsi_cmnd *scmd)
 	return blk_rq_pos(scmd->request);
 }
 
-static inline u32 scsi_prot_ref_tag(struct scsi_cmnd *scmd)
-{
-	struct request *rq = blk_mq_rq_from_pdu(scmd);
-
-	return t10_pi_ref_tag(rq);
-}
-
 static inline unsigned int scsi_prot_interval(struct scsi_cmnd *scmd)
 {
 	return scmd->device->sector_size;