diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h
index e2c1e66d58ae..6f547906a49b 100644
--- a/include/scsi/libsas.h
+++ b/include/scsi/libsas.h
@@ -170,12 +170,12 @@ enum ata_command_set {
 
 struct sata_device {
         enum   ata_command_set command_set;
-        struct smp_resp        rps_resp; /* report_phy_sata_resp */
         u8     port_no;        /* port number, if this is a PM (Port) */
 	int    pm_result;
 
 	struct ata_port *ap;
 	struct ata_host ata_host;
+	struct smp_resp rps_resp ____cacheline_aligned; /* report_phy_sata_resp */
 	u8     fis[ATA_RESP_FIS_SIZE];
 };