From db07a6e8500e8e5bbdc3e87b24ffeea247e8b9ba Mon Sep 17 00:00:00 2001
From: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Date: Wed, 6 Aug 2025 15:03:54 -0400
Subject: [PATCH] mesa/st: mark internal buffer map call as UNSYNCHRONIZED
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these are new buffers with empty contents which are immediately
unmapped after a memcpy, so there's no reason to force
the driver (or tc) to sync

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36634>
---
 src/mesa/main/bufferobj.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/mesa/main/bufferobj.c b/src/mesa/main/bufferobj.c
index 6b598a5b48b..08017988de6 100644
--- a/src/mesa/main/bufferobj.c
+++ b/src/mesa/main/bufferobj.c
@@ -360,7 +360,9 @@ bufferobj_data(struct gl_context *ctx,
          obj->buffer = screen->resource_create(screen, &buffer);
 
          if (obj->buffer && data)
-            pipe_buffer_write(pipe, obj->buffer, 0, size, data);
+            pipe->buffer_subdata(pipe, obj->buffer,
+                                 PIPE_MAP_WRITE | PIPE_MAP_DISCARD_WHOLE_RESOURCE | PIPE_MAP_UNSYNCHRONIZED,
+                                 0, size, data);
       }
 
       if (!obj->buffer) {