Re: [PATCH] drm/test: drm_exec: use kzalloc() to allocate GEM objects

["Danilo Krummrich" <dakr@kernel.org>]

On Fri Aug 29, 2025 at 9:55 AM CEST, Danilo Krummrich wrote:
> diff --git a/drivers/gpu/drm/tests/drm_exec_test.c b/drivers/gpu/drm/tests/drm_exec_test.c
> index d6c4dd1194a0..d59ec3baae1d 100644
> --- a/drivers/gpu/drm/tests/drm_exec_test.c
> +++ b/drivers/gpu/drm/tests/drm_exec_test.c
> @@ -150,14 +150,22 @@ static void test_prepare(struct kunit *test)
>  static void test_prepare_array(struct kunit *test)
>  {
>  	struct drm_exec_priv *priv = test->priv;
> -	struct drm_gem_object gobj1 = { };
> -	struct drm_gem_object gobj2 = { };
> -	struct drm_gem_object *array[] = { &gobj1, &gobj2 };
> +	struct drm_gem_object *gobj1;
> +	struct drm_gem_object *gobj2;
> +	struct drm_gem_object *array[] = {
> +		(gobj1 = kzalloc(sizeof(*gobj1), GFP_KERNEL)),
> +		(gobj2 = kzalloc(sizeof(*gobj2), GFP_KERNEL)),
> +	};

Actually, I think this should use kunit_kzmalloc() instead. Unless anyone
disagrees, I'd apply the following hunk when applying the patch.

diff --git a/drivers/gpu/drm/tests/drm_exec_test.c b/drivers/gpu/drm/tests/drm_exec_test.c
index d59ec3baae1d..3a20c788c51f 100644
--- a/drivers/gpu/drm/tests/drm_exec_test.c
+++ b/drivers/gpu/drm/tests/drm_exec_test.c
@@ -153,15 +153,15 @@ static void test_prepare_array(struct kunit *test)
        struct drm_gem_object *gobj1;
        struct drm_gem_object *gobj2;
        struct drm_gem_object *array[] = {
-               (gobj1 = kzalloc(sizeof(*gobj1), GFP_KERNEL)),
-               (gobj2 = kzalloc(sizeof(*gobj2), GFP_KERNEL)),
+               (gobj1 = kunit_kzalloc(test, sizeof(*gobj1), GFP_KERNEL)),
+               (gobj2 = kunit_kzalloc(test, sizeof(*gobj2), GFP_KERNEL)),
        };
        struct drm_exec exec;
        int ret;

        if (!gobj1 || !gobj2) {
                KUNIT_FAIL(test, "Failed to allocate GEM objects.\n");
-               goto out;
+               return;
        }

        drm_gem_private_object_init(priv->drm, gobj1, PAGE_SIZE);
@@ -176,10 +176,6 @@ static void test_prepare_array(struct kunit *test)

        drm_gem_private_object_fini(gobj1);
        drm_gem_private_object_fini(gobj2);
-
-out:
-       kfree(gobj1);
-       kfree(gobj2);
 }

 static void test_multiple_loops(struct kunit *test)