From: Marek Olšák <marek.ol...@amd.com>

---
 src/gallium/auxiliary/util/u_inlines.h      | 21 +++++++++++++++++++++
 src/gallium/auxiliary/vl/vl_compositor.c    |  2 +-
 src/gallium/drivers/radeonsi/si_pipe.c      |  2 +-
 src/gallium/state_trackers/xa/xa_renderer.c |  7 ++++---
 4 files changed, 27 insertions(+), 5 deletions(-)

diff --git a/src/gallium/auxiliary/util/u_inlines.h 
b/src/gallium/auxiliary/util/u_inlines.h
index 4ba6ad7..4bd9b7e 100644
--- a/src/gallium/auxiliary/util/u_inlines.h
+++ b/src/gallium/auxiliary/util/u_inlines.h
@@ -277,20 +277,41 @@ pipe_buffer_create( struct pipe_screen *screen,
    buffer.usage = usage;
    buffer.flags = 0;
    buffer.width0 = size;
    buffer.height0 = 1;
    buffer.depth0 = 1;
    buffer.array_size = 1;
    return screen->resource_create(screen, &buffer);
 }
 
 
+static inline struct pipe_resource *
+pipe_buffer_create_const0(struct pipe_screen *screen,
+                          unsigned bind,
+                          enum pipe_resource_usage usage,
+                          unsigned size)
+{
+   struct pipe_resource buffer;
+   memset(&buffer, 0, sizeof buffer);
+   buffer.target = PIPE_BUFFER;
+   buffer.format = PIPE_FORMAT_R8_UNORM;
+   buffer.bind = bind;
+   buffer.usage = usage;
+   buffer.flags = screen->get_param(screen, PIPE_CAP_CONSTBUF0_FLAGS);
+   buffer.width0 = size;
+   buffer.height0 = 1;
+   buffer.depth0 = 1;
+   buffer.array_size = 1;
+   return screen->resource_create(screen, &buffer);
+}
+
+
 /**
  * Map a range of a resource.
  * \param offset  start of region, in bytes 
  * \param length  size of region, in bytes 
  * \param access  bitmask of PIPE_TRANSFER_x flags
  * \param transfer  returns a transfer object
  */
 static inline void *
 pipe_buffer_map_range(struct pipe_context *pipe,
                      struct pipe_resource *buffer,
diff --git a/src/gallium/auxiliary/vl/vl_compositor.c 
b/src/gallium/auxiliary/vl/vl_compositor.c
index 67ad7f5..725bfd9 100644
--- a/src/gallium/auxiliary/vl/vl_compositor.c
+++ b/src/gallium/auxiliary/vl/vl_compositor.c
@@ -1430,21 +1430,21 @@ vl_compositor_init_state(struct vl_compositor_state *s, 
struct pipe_context *pip
    s->pipe = pipe;
 
    s->clear_color.f[0] = s->clear_color.f[1] = 0.0f;
    s->clear_color.f[2] = s->clear_color.f[3] = 0.0f;
 
    /*
     * Create our fragment shader's constant buffer
     * Const buffer contains the color conversion matrix and bias vectors
     */
    /* XXX: Create with IMMUTABLE/STATIC... although it does change every once 
in a long while... */
-   s->csc_matrix = pipe_buffer_create
+   s->csc_matrix = pipe_buffer_create_const0
    (
       pipe->screen,
       PIPE_BIND_CONSTANT_BUFFER,
       PIPE_USAGE_DEFAULT,
       sizeof(csc_matrix) + 2*sizeof(float)
    );
 
    if (!s->csc_matrix)
       return false;
 
diff --git a/src/gallium/drivers/radeonsi/si_pipe.c 
b/src/gallium/drivers/radeonsi/si_pipe.c
index 26835d6..1a5d598 100644
--- a/src/gallium/drivers/radeonsi/si_pipe.c
+++ b/src/gallium/drivers/radeonsi/si_pipe.c
@@ -580,21 +580,21 @@ static void si_handle_env_var_force_family(struct 
si_screen *sscreen)
 
        fprintf(stderr, "radeonsi: Unknown family: %s\n", family);
        exit(1);
 }
 
 static void si_test_vmfault(struct si_screen *sscreen)
 {
        struct pipe_context *ctx = sscreen->aux_context;
        struct si_context *sctx = (struct si_context *)ctx;
        struct pipe_resource *buf =
-               pipe_buffer_create(&sscreen->b, 0, PIPE_USAGE_DEFAULT, 64);
+               pipe_buffer_create_const0(&sscreen->b, 0, PIPE_USAGE_DEFAULT, 
64);
 
        if (!buf) {
                puts("Buffer allocation failed.");
                exit(1);
        }
 
        r600_resource(buf)->gpu_address = 0; /* cause a VM fault */
 
        if (sscreen->debug_flags & DBG(TEST_VMFAULT_CP)) {
                si_copy_buffer(sctx, buf, buf, 0, 4, 4, 0);
diff --git a/src/gallium/state_trackers/xa/xa_renderer.c 
b/src/gallium/state_trackers/xa/xa_renderer.c
index bc55f87..27497d3 100644
--- a/src/gallium/state_trackers/xa/xa_renderer.c
+++ b/src/gallium/state_trackers/xa/xa_renderer.c
@@ -386,23 +386,24 @@ renderer_bind_destination(struct xa_context *r,
 
 void
 renderer_set_constants(struct xa_context *r,
                       int shader_type, const float *params, int param_bytes)
 {
     struct pipe_resource **cbuf =
        (shader_type == PIPE_SHADER_VERTEX) ? &r->vs_const_buffer :
        &r->fs_const_buffer;
 
     pipe_resource_reference(cbuf, NULL);
-    *cbuf = pipe_buffer_create(r->pipe->screen,
-                              PIPE_BIND_CONSTANT_BUFFER, PIPE_USAGE_DEFAULT,
-                              param_bytes);
+    *cbuf = pipe_buffer_create_const0(r->pipe->screen,
+                                      PIPE_BIND_CONSTANT_BUFFER,
+                                      PIPE_USAGE_DEFAULT,
+                                      param_bytes);
 
     if (*cbuf) {
        pipe_buffer_write(r->pipe, *cbuf, 0, param_bytes, params);
     }
     pipe_set_constant_buffer(r->pipe, shader_type, 0, *cbuf);
 }
 
 void
 renderer_copy_prepare(struct xa_context *r,
                      struct pipe_surface *dst_surface,
-- 
2.7.4

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