1 files changed, 7 insertions, 1 deletions

diff --git a/include/net/9p/9p.h b/include/net/9p/9p.h
index fb163e2e0de6..f9e25268b70f 100644
--- a/include/net/9p/9p.h
+++ b/include/net/9p/9p.h
@@ -509,6 +509,8 @@ struct p9_rwstat {
  * @size: prefixed length of the structure
  * @id: protocol operating identifier of type &p9_msg_t
  * @tag: transaction id of the request
+ * @offset: used by marshalling routines to track currentposition in buffer
+ * @capacity: used by marshalling routines to track total capacity
  * @sdata: payload
  * @params: per-operation parameters
  *
@@ -523,7 +525,11 @@ struct p9_fcall {
         u32 size;
         u8 id;
         u16 tag;
-        void *sdata;
+
+        size_t offset;
+        size_t capacity;
+
+        uint8_t *sdata;
 
         union {
                 struct p9_tversion tversion;