iris: declare padding for iris_vue_prog_key

Otherwise with some compilers/environments (Android) padding
may contain garbage and memcmp of the key will fail.

Cc: mesa-stable
Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12438>

diff --git a/src/gallium/drivers/iris/iris_context.h b/src/gallium/drivers/iris/iris_context.h
index d820cb0..60d2cd2 100644 (file)
--- a/src/gallium/drivers/iris/iris_context.h
+++ b/src/gallium/drivers/iris/iris_context.h
@@ -202,10 +202,15 @@ struct iris_base_prog_key {
    unsigned program_string_id;
 };
 
+/**
+ * Note, we need to take care to have padding explicitly declared
+ * for key since we will directly memcmp the whole struct.
+ */
 struct iris_vue_prog_key {
    struct iris_base_prog_key base;
 
    unsigned nr_userclip_plane_consts:4;
+   unsigned padding:28;
 };
 
 struct iris_vs_prog_key {