Re: [PATCH 01/28] [NOT FOR REVIEW] drm: color pipeline base work

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Hi Uma,

kernel test robot noticed the following build warnings:

[auto build test WARNING on drm-misc/drm-misc-next]
[also build test WARNING on drm/drm-next next-20240213]
[cannot apply to drm-intel/for-linux-next drm-intel/for-linux-next-fixes linus/master v6.8-rc4]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Uma-Shankar/drm-color-pipeline-base-work/20240213-144544
base:   git://anongit.freedesktop.org/drm/drm-misc drm-misc-next
patch link:    https://lore.kernel.org/r/20240213064835.139464-2-uma.shankar%40intel.com
patch subject: [PATCH 01/28] [NOT FOR REVIEW] drm: color pipeline base work
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20240214/202402141056.LzCSLaOT-lkp@xxxxxxxxx/config)
compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240214/202402141056.LzCSLaOT-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/202402141056.LzCSLaOT-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/tests/drm_fixp_test.c:11:59: warning: overflow in expression; result is 9223372036854775807 with type 'long long' [-Winteger-overflow]
      11 |         KUNIT_EXPECT_EQ(test, 0x7fffffffffffffffll, ((1LL << 63) - 1));
         |                                                                  ^
   1 warning generated.
--
>> drivers/gpu/drm/vkms/vkms_composer.c:95:5: warning: no previous prototype for function 'lerp_u16' [-Wmissing-prototypes]
      95 | u16 lerp_u16(u16 a, u16 b, s64 t)
         |     ^
   drivers/gpu/drm/vkms/vkms_composer.c:95:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      95 | u16 lerp_u16(u16 a, u16 b, s64 t)
         | ^
         | static 
>> drivers/gpu/drm/vkms/vkms_composer.c:105:5: warning: no previous prototype for function 'get_lut_index' [-Wmissing-prototypes]
     105 | s64 get_lut_index(const struct vkms_color_lut *lut, u16 channel_value)
         |     ^
   drivers/gpu/drm/vkms/vkms_composer.c:105:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     105 | s64 get_lut_index(const struct vkms_color_lut *lut, u16 channel_value)
         | ^
         | static 
>> drivers/gpu/drm/vkms/vkms_composer.c:167:6: warning: no previous prototype for function 'apply_3x4_matrix' [-Wmissing-prototypes]
     167 | void apply_3x4_matrix(struct pixel_argb_s32 *pixel, const struct drm_color_ctm_3x4 *matrix)
         |      ^
   drivers/gpu/drm/vkms/vkms_composer.c:167:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     167 | void apply_3x4_matrix(struct pixel_argb_s32 *pixel, const struct drm_color_ctm_3x4 *matrix)
         | ^
         | static 
   3 warnings generated.
--
>> drivers/gpu/drm/vkms/vkms_colorop.c:11:1: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
      11 | const int vkms_initialize_tf_pipeline(struct drm_plane *plane, struct drm_prop_enum_list *list)
         | ^~~~~
>> drivers/gpu/drm/vkms/vkms_colorop.c:11:11: warning: no previous prototype for function 'vkms_initialize_tf_pipeline' [-Wmissing-prototypes]
      11 | const int vkms_initialize_tf_pipeline(struct drm_plane *plane, struct drm_prop_enum_list *list)
         |           ^
   drivers/gpu/drm/vkms/vkms_colorop.c:11:7: note: declare 'static' if the function is not intended to be used outside of this translation unit
      11 | const int vkms_initialize_tf_pipeline(struct drm_plane *plane, struct drm_prop_enum_list *list)
         |       ^
         | static 
>> drivers/gpu/drm/vkms/vkms_colorop.c:80:5: warning: no previous prototype for function 'vkms_initialize_colorops' [-Wmissing-prototypes]
      80 | int vkms_initialize_colorops(struct drm_plane *plane)
         |     ^
   drivers/gpu/drm/vkms/vkms_colorop.c:80:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      80 | int vkms_initialize_colorops(struct drm_plane *plane)
         | ^
         | static 
   3 warnings generated.


vim +11 drivers/gpu/drm/tests/drm_fixp_test.c

     8	
     9	static void drm_test_sm2fixp(struct kunit *test)
    10	{
  > 11		KUNIT_EXPECT_EQ(test, 0x7fffffffffffffffll, ((1LL << 63) - 1));
    12	
    13		/* 1 */
    14		KUNIT_EXPECT_EQ(test, drm_int2fixp(1), drm_sm2fixp(1ull << DRM_FIXED_POINT));
    15	
    16		/* -1 */
    17		KUNIT_EXPECT_EQ(test, drm_int2fixp(-1), drm_sm2fixp((1ull << 63) | (1ull << DRM_FIXED_POINT)));
    18	
    19		/* 0.5 */
    20		KUNIT_EXPECT_EQ(test, drm_fixp_from_fraction(1, 2), drm_sm2fixp(1ull << (DRM_FIXED_POINT - 1)));
    21	
    22		/* -0.5 */
    23		KUNIT_EXPECT_EQ(test, drm_fixp_from_fraction(-1, 2), drm_sm2fixp((1ull << 63) | (1ull << (DRM_FIXED_POINT - 1))));
    24	

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



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