swrast-dri: Silence several "warning: unused parameter"

src/mesa/drivers/dri/swrast/swrast.c

@@ -135,6 +135,9 @@ swrastFillInModes(__DRIscreen *psp,
     uint8_t stencil_bits_array[4];
     uint8_t msaa_samples_array[1];
 
+    (void) psp;
+    (void) have_back_buffer;
+
     depth_bits_array[0] = 0;
     depth_bits_array[1] = 0;
     depth_bits_array[2] = depth_bits;
@@ -215,6 +218,7 @@ static void
 dri_destroy_screen(__DRIscreen * sPriv)
 {
     TRACE;
+    (void) sPriv;
 }
 
 
@@ -278,6 +282,9 @@ swrast_alloc_front_storage(struct gl_context *ctx, struct gl_renderbuffer *rb,
 
     TRACE;
 
+    (void) ctx;
+    (void) internalFormat;
+
     rb->Data = NULL;
     rb->Width = width;
     rb->Height = height;
@@ -376,6 +383,9 @@ dri_create_buffer(__DRIscreen * sPriv,
 
     TRACE;
 
+    (void) sPriv;
+    (void) isPixmap;
+
     drawable = CALLOC_STRUCT(dri_drawable);
     if (drawable == NULL)
 	goto drawable_fail;
@@ -537,6 +547,10 @@ viewport(struct gl_context *ctx, GLint x, GLint y, GLsizei w, GLsizei h)
     struct gl_framebuffer *draw = ctx->WinSysDrawBuffer;
     struct gl_framebuffer *read = ctx->WinSysReadBuffer;
 
+    (void) x;
+    (void) y;
+    (void) w;
+    (void) h;
     swrast_check_and_update_window_size(ctx, draw);
     swrast_check_and_update_window_size(ctx, read);
 }