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-rw-r--r--include/linux/device-mapper.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index 531a6f2635a..751ce21dea7 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;