Re: [PATCH v2 06/11] drm/tests: helpers: Create a helper to allocate an atomic state

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Hi Maxime,

kernel test robot noticed the following build warnings:

[auto build test WARNING on c58c49dd89324b18a812762a2bfa5a0458e4f252]

url:    https://github.com/intel-lab-lkp/linux/commits/Maxime-Ripard/drm-tests-helpers-Switch-to-kunit-actions/20230720-191901
base:   c58c49dd89324b18a812762a2bfa5a0458e4f252
patch link:    https://lore.kernel.org/r/20230720-kms-kunit-actions-rework-v2-6-175017bd56ab%40kernel.org
patch subject: [PATCH v2 06/11] drm/tests: helpers: Create a helper to allocate an atomic state
config: arm64-randconfig-r022-20230720 (https://download.01.org/0day-ci/archive/20230721/202307210124.Ur3UNuxZ-lkp@xxxxxxxxx/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce: (https://download.01.org/0day-ci/archive/20230721/202307210124.Ur3UNuxZ-lkp@xxxxxxxxx/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202307210124.Ur3UNuxZ-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

   drivers/gpu/drm/tests/drm_kunit_helpers.c:54:6: warning: cast from 'void (*)(struct platform_driver *)' to 'kunit_action_t *' (aka 'void (*)(void *)') converts to incompatible function type [-Wcast-function-type-strict]
      54 |                                         (kunit_action_t *)platform_driver_unregister,
         |                                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/tests/drm_kunit_helpers.c:62:6: warning: cast from 'void (*)(struct platform_device *)' to 'kunit_action_t *' (aka 'void (*)(void *)') converts to incompatible function type [-Wcast-function-type-strict]
      62 |                                         (kunit_action_t *)platform_device_put,
         |                                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/tests/drm_kunit_helpers.c:70:6: warning: cast from 'void (*)(struct platform_device *)' to 'kunit_action_t *' (aka 'void (*)(void *)') converts to incompatible function type [-Wcast-function-type-strict]
      70 |                                         (kunit_action_t *)platform_device_del,
         |                                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/tests/drm_kunit_helpers.c:90:9: warning: cast from 'void (*)(struct platform_device *)' to 'kunit_action_t *' (aka 'void (*)(void *)') converts to incompatible function type [-Wcast-function-type-strict]
      90 |                              (kunit_action_t *)platform_device_unregister,
         |                              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/tests/drm_kunit_helpers.c:94:9: warning: cast from 'void (*)(struct platform_driver *)' to 'kunit_action_t *' (aka 'void (*)(void *)') converts to incompatible function type [-Wcast-function-type-strict]
      94 |                              (kunit_action_t *)platform_driver_unregister,
         |                              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/tests/drm_kunit_helpers.c:192:6: warning: cast from 'void (*)(struct drm_atomic_state *)' to 'kunit_action_t *' (aka 'void (*)(void *)') converts to incompatible function type [-Wcast-function-type-strict]
     192 |                                         (kunit_action_t *)drm_atomic_state_put,
         |                                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   6 warnings generated.


vim +192 drivers/gpu/drm/tests/drm_kunit_helpers.c

   164	
   165	/**
   166	 * drm_kunit_helper_atomic_state_alloc - Allocates an atomic state
   167	 * @test: The test context object
   168	 * @drm: The device to alloc the state for
   169	 * @ctx: Locking context for that atomic update
   170	 *
   171	 * Allocates a empty atomic state.
   172	 *
   173	 * The state is tied to the kunit test context, so we must not call
   174	 * drm_atomic_state_put() on it, it will be done so automatically.
   175	 *
   176	 * Returns:
   177	 * An ERR_PTR on error, a pointer to the newly allocated state otherwise
   178	 */
   179	struct drm_atomic_state *
   180	drm_kunit_helper_atomic_state_alloc(struct kunit *test,
   181					    struct drm_device *drm,
   182					    struct drm_modeset_acquire_ctx *ctx)
   183	{
   184		struct drm_atomic_state *state;
   185		int ret;
   186	
   187		state = drm_atomic_state_alloc(drm);
   188		if (!state)
   189			return ERR_PTR(-ENOMEM);
   190	
   191		ret = kunit_add_action_or_reset(test,
 > 192						(kunit_action_t *)drm_atomic_state_put,
   193						state);
   194		if (ret)
   195			return ERR_PTR(ret);
   196	
   197		state->acquire_ctx = ctx;
   198	
   199		return state;
   200	}
   201	EXPORT_SYMBOL_GPL(drm_kunit_helper_atomic_state_alloc);
   202	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki



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