1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h
index 4cfd8016010e..f6faaa16a565 100644
--- a/drivers/md/raid5.h
+++ b/drivers/md/raid5.h
@@ -259,6 +259,7 @@ struct stripe_head_state {
 enum r5dev_flags {
         R5_UPTODATE,    /* page contains current data */
         R5_LOCKED,      /* IO has been submitted on "req" */
+        R5_DOUBLE_LOCKED,/* Cannot clear R5_LOCKED until 2 writes complete */
         R5_OVERWRITE,   /* towrite covers whole page */
 /* and some that are internal to handle_stripe */
         R5_Insync,      /* rdev && rdev->in_sync at start */