Hi Maíra, kernel test robot noticed the following build warnings:
https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Ma-ra-Canal/drm-vkms-add-module-parameter-to-set-background-color/20230407-012233 base: git://anongit.freedesktop.org/drm/drm-misc drm-misc-next patch link: https://lore.kernel.org/r/20230406172002.124456-1-mcanal%40igalia.com patch subject: [PATCH] drm/vkms: add module parameter to set background color config: i386-randconfig-m031-20230403 (https://download.01.org/0day-ci/archive/20230408/[email protected]/config) compiler: gcc-11 (Debian 11.3.0-8) 11.3.0 If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <[email protected]> | Reported-by: Dan Carpenter <[email protected]> | Link: https://lore.kernel.org/r/[email protected]/ smatch warnings: drivers/gpu/drm/vkms/vkms_composer.c:93 blend() warn: right shifting more than type allows 32 vs 32 vim +93 drivers/gpu/drm/vkms/vkms_composer.c d725068207852d drivers/gpu/drm/vkms/vkms_composer.c Maíra Canal 2023-04-06 82 static void blend(struct vkms_device *vkms_dev, d725068207852d drivers/gpu/drm/vkms/vkms_composer.c Maíra Canal 2023-04-06 83 struct vkms_writeback_job *wb, 8ba1648567e289 drivers/gpu/drm/vkms/vkms_composer.c Igor Torrente 2022-09-05 84 struct vkms_crtc_state *crtc_state, 8ba1648567e289 drivers/gpu/drm/vkms/vkms_composer.c Igor Torrente 2022-09-05 85 u32 *crc32, struct line_buffer *stage_buffer, 8ba1648567e289 drivers/gpu/drm/vkms/vkms_composer.c Igor Torrente 2022-09-05 86 struct line_buffer *output_buffer, size_t row_size) 39cba5cf8c2c23 drivers/gpu/drm/vkms/vkms_composer.c Melissa Wen 2020-08-25 87 { 8ba1648567e289 drivers/gpu/drm/vkms/vkms_composer.c Igor Torrente 2022-09-05 88 struct vkms_plane_state **plane = crtc_state->active_planes; 8ba1648567e289 drivers/gpu/drm/vkms/vkms_composer.c Igor Torrente 2022-09-05 89 u32 n_active_planes = crtc_state->num_active_planes; 39cba5cf8c2c23 drivers/gpu/drm/vkms/vkms_composer.c Melissa Wen 2020-08-25 90 d725068207852d drivers/gpu/drm/vkms/vkms_composer.c Maíra Canal 2023-04-06 91 const struct pixel_argb_u16 background_color = { d725068207852d drivers/gpu/drm/vkms/vkms_composer.c Maíra Canal 2023-04-06 92 .a = 0xffff, d725068207852d drivers/gpu/drm/vkms/vkms_composer.c Maíra Canal 2023-04-06 @93 .r = (*vkms_dev->config->background_color >> 32) & 0xffff, ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ This shift always results in zero. d725068207852d drivers/gpu/drm/vkms/vkms_composer.c Maíra Canal 2023-04-06 94 .g = (*vkms_dev->config->background_color >> 16) & 0xffff, d725068207852d drivers/gpu/drm/vkms/vkms_composer.c Maíra Canal 2023-04-06 95 .b = *vkms_dev->config->background_color & 0xffff, d725068207852d drivers/gpu/drm/vkms/vkms_composer.c Maíra Canal 2023-04-06 96 }; 32a1648aca4409 drivers/gpu/drm/vkms/vkms_composer.c Melissa Wen 2021-04-24 97 bc0d7fdefec62e drivers/gpu/drm/vkms/vkms_composer.c Igor Torrente 2022-09-05 98 size_t crtc_y_limit = crtc_state->base.crtc->mode.vdisplay; 39cba5cf8c2c23 drivers/gpu/drm/vkms/vkms_composer.c Melissa Wen 2020-08-25 99 bc0d7fdefec62e drivers/gpu/drm/vkms/vkms_composer.c Igor Torrente 2022-09-05 100 for (size_t y = 0; y < crtc_y_limit; y++) { bc0d7fdefec62e drivers/gpu/drm/vkms/vkms_composer.c Igor Torrente 2022-09-05 101 fill_background(&background_color, output_buffer); bc0d7fdefec62e drivers/gpu/drm/vkms/vkms_composer.c Igor Torrente 2022-09-05 102 bc0d7fdefec62e drivers/gpu/drm/vkms/vkms_composer.c Igor Torrente 2022-09-05 103 /* The active planes are composed associatively in z-order. */ bc0d7fdefec62e drivers/gpu/drm/vkms/vkms_composer.c Igor Torrente 2022-09-05 104 for (size_t i = 0; i < n_active_planes; i++) { 8ba1648567e289 drivers/gpu/drm/vkms/vkms_composer.c Igor Torrente 2022-09-05 105 if (!check_y_limit(plane[i]->frame_info, y)) 8ba1648567e289 drivers/gpu/drm/vkms/vkms_composer.c Igor Torrente 2022-09-05 106 continue; 8ba1648567e289 drivers/gpu/drm/vkms/vkms_composer.c Igor Torrente 2022-09-05 107 8ba1648567e289 drivers/gpu/drm/vkms/vkms_composer.c Igor Torrente 2022-09-05 108 plane[i]->plane_read(stage_buffer, plane[i]->frame_info, y); 8ba1648567e289 drivers/gpu/drm/vkms/vkms_composer.c Igor Torrente 2022-09-05 109 pre_mul_alpha_blend(plane[i]->frame_info, stage_buffer, 8ba1648567e289 drivers/gpu/drm/vkms/vkms_composer.c Igor Torrente 2022-09-05 110 output_buffer); db7f419c06d7cc drivers/gpu/drm/vkms/vkms_crc.c Haneen Mohammed 2018-09-06 111 } 8ba1648567e289 drivers/gpu/drm/vkms/vkms_composer.c Igor Torrente 2022-09-05 112 8ba1648567e289 drivers/gpu/drm/vkms/vkms_composer.c Igor Torrente 2022-09-05 113 *crc32 = crc32_le(*crc32, (void *)output_buffer->pixels, row_size); 8ba1648567e289 drivers/gpu/drm/vkms/vkms_composer.c Igor Torrente 2022-09-05 114 8ba1648567e289 drivers/gpu/drm/vkms/vkms_composer.c Igor Torrente 2022-09-05 115 if (wb) 8ba1648567e289 drivers/gpu/drm/vkms/vkms_composer.c Igor Torrente 2022-09-05 116 wb->wb_write(&wb->wb_frame_info, output_buffer, y); db7f419c06d7cc drivers/gpu/drm/vkms/vkms_crc.c Haneen Mohammed 2018-09-06 117 } db7f419c06d7cc drivers/gpu/drm/vkms/vkms_crc.c Haneen Mohammed 2018-09-06 118 } -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
