dm: linear support discard

[pandora-kernel.git] / include / linux / device-mapper.h

diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index 531a6f2..751ce21 100644 (file)
--- 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;