dm: prepare to support WRITE SAME

[~andy/linux] / include / linux / device-mapper.h

diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index 38d27a10aa5d9f922a14dd5746b9e29f34bce633..d1f6cd8486f28e890407bce23ecea5e181069886 100644 (file)
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -205,6 +205,11 @@ struct dm_target {
         */
        unsigned num_discard_requests;
 
+       /*
+        * The number of WRITE SAME requests that will be submitted to the target.
+        */
+       unsigned num_write_same_requests;
+
        /* target specific data */
        void *private;