From 6f1b5052ec0de0f5ed6dd17adeb9639a4cff5c05 Mon Sep 17 00:00:00 2001
From: Brian Paul <brianp@vmware.com>
Date: Fri, 11 Oct 2013 09:20:56 -0600
Subject: [PATCH] mesa: add comment to clarify ctx->Driver.MapBufferRange()
 return value

---
 src/mesa/main/dd.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/mesa/main/dd.h b/src/mesa/main/dd.h
index 0806e41a021..29469ce3314 100644
--- a/src/mesa/main/dd.h
+++ b/src/mesa/main/dd.h
@@ -575,7 +575,8 @@ struct dd_function_table {
                               GLintptr readOffset, GLintptr writeOffset,
                               GLsizeiptr size );
 
-   /* May return NULL if MESA_MAP_NOWAIT_BIT is set in access:
+   /* Returns pointer to the start of the mapped range.
+    * May return NULL if MESA_MAP_NOWAIT_BIT is set in access:
     */
    void * (*MapBufferRange)( struct gl_context *ctx, GLintptr offset,
                              GLsizeiptr length, GLbitfield access,
-- 
2.30.2