1 files changed, 6 insertions, 0 deletions

diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index 531a6f2635ae..751ce21dea7b 100644
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -180,6 +180,12 @@ struct dm_target {
          */
         unsigned num_flush_requests;
 
+        /*
+         * The number of discard requests that will be submitted to the
+         * target.  map_info->request_nr is used just like num_flush_requests.
+         */
+        unsigned num_discard_requests;
+
         /* target specific data */
         void *private;