[radeon-alex:amd-staging-drm-next 63/158] drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/bandwidth_calcs.c:508:5: warning: this decimal constant is unsigned only in ISO C90

[kbuild test robot]

tree:   git://people.freedesktop.org/~agd5f/linux.git amd-staging-drm-next
head:   5d8e75c019bf76889bd606a67afabf7d0b32d3fa
commit: 5a0a709652ceaca0a36ef2d0954b8d9d3f690560 [63/158] drm/amd/dc: Add dc display driver
config: parisc-allyesconfig (attached as .config)
compiler: hppa-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 5a0a709652ceaca0a36ef2d0954b8d9d3f690560
        # save the attached .config to linux build tree
        make.cross ARCH=parisc 

All warnings (new ones prefixed by >>):

   drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/bandwidth_calcs.c: In function 'calculate_bandwidth':
>> drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/bandwidth_calcs.c:508:5: warning: this decimal constant is unsigned only in ISO C90
        data->lb_line_pitch = bw_ceil2(bw_mul(bw_div(bw_frc_to_fixed(2401171875, 100000000), bw_int_to_fixed(3)), bw_ceil2(data->source_width_in_lb, bw_int_to_fixed(8))), bw_int_to_fixed(48));
        ^~~~
   drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/bandwidth_calcs.c:1712:362: warning: array subscript is above array bounds [-Warray-bounds]
         data->blackout_recovery_time = bw_max2(data->blackout_recovery_time, bw_div((bw_add(bw_mul(bw_div(bw_mul(data->display_bandwidth[k], data->useful_bytes_per_request[k]), data->bytes_per_request[k]), vbios->blackout_duration), bw_sub(bw_div(bw_mul(bw_mul(bw_mul((bw_add(bw_add(bw_mul(bw_int_to_fixed(2), vbios->mcifwrmc_urgent_latency), data->dmif_burst_time[i][j]), data->mcifwr_burst_time[data->y_clk_level][data->sclk_level])), data->dispclk), bw_int_to_fixed(data->bytes_per_pixel[k])), data->lines_interleaved_in_mem_access[k]), data->latency_hiding_lines[k]), data->adjusted_data_buffer_size[k]))), (bw_sub(bw_div(bw_mul(bw_mul(data->dispclk, bw_int_to_fixed(data->bytes_per_pixel[k])), data->lines_interleaved_in_mem_access[k]), data->latency_hiding_lines[k]), bw_div(bw_mul(data->display_bandwidth[k], data->useful_bytes_per_request[k]), data->bytes_per_request[k])))));
                                                                                                                                                                                                                                                                                                                                                        ~~~~~~~~~~~~~~~~~~~~~^~~

vim +508 drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/bandwidth_calcs.c

   492						}
   493					}
   494				}
   495			}
   496		}
   497		lb_size_check = bw_def_ok;
   498		for (i = 0; i <= maximum_number_of_surfaces - 1; i++) {
   499			if (data->enable[i]) {
   500				if ((dceip->pre_downscaler_enabled && bw_mtn(data->hsr[i], bw_int_to_fixed(1)))) {
   501					data->source_width_in_lb = bw_div(data->source_width_pixels[i], data->hsr[i]);
   502				}
   503				else {
   504					data->source_width_in_lb = data->source_width_pixels[i];
   505				}
   506				switch (data->lb_bpc[i]) {
   507				case 8:
 > 508					data->lb_line_pitch = bw_ceil2(bw_mul(bw_div(bw_frc_to_fixed(2401171875, 100000000), bw_int_to_fixed(3)), bw_ceil2(data->source_width_in_lb, bw_int_to_fixed(8))), bw_int_to_fixed(48));
   509					break;
   510				case 10:
   511					data->lb_line_pitch = bw_ceil2(bw_mul(bw_div(bw_frc_to_fixed(300234375, 10000000), bw_int_to_fixed(3)), bw_ceil2(data->source_width_in_lb, bw_int_to_fixed(8))), bw_int_to_fixed(48));
   512					break;
   513				default:
   514					data->lb_line_pitch = bw_ceil2(bw_mul(bw_int_to_fixed(data->lb_bpc[i]), data->source_width_in_lb), bw_int_to_fixed(48));
   515					break;
   516				}

---
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