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X-CSE-ConnectionGUID: Cq1LX7SJQuq/Oj8w5gm0Kg== X-CSE-MsgGUID: H/9a5tNLRaieN/6U04H7xQ== X-IronPort-AV: E=McAfee;i="6800,10657,11776"; a="78882408" X-IronPort-AV: E=Sophos;i="6.23,217,1770624000"; d="scan'208";a="78882408" Received: from fmviesa004.fm.intel.com ([10.60.135.144]) by fmvoesa108.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 May 2026 01:12:50 -0700 X-CSE-ConnectionGUID: E3QWLVgnQ0u11hWb8tV01A== X-CSE-MsgGUID: NxUjHUJCT4elHSezVWSDuw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,217,1770624000"; d="scan'208";a="237522065" Received: from lkp-server01.sh.intel.com (HELO 781826d00641) ([10.239.97.150]) by fmviesa004.fm.intel.com with ESMTP; 05 May 2026 01:12:47 -0700 Received: from kbuild by 781826d00641 with local (Exim 4.98.2) (envelope-from ) id 1wKAtZ-000000004NN-0u2k; Tue, 05 May 2026 08:12:45 +0000 Date: Tue, 5 May 2026 16:11:52 +0800 From: kernel test robot To: Francisco Maestre , sudipm.mukherjee@gmail.com, teddy.wang@siliconmotion.com, gregkh@linuxfoundation.org Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, linux-fbdev@vger.kernel.org, linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org, Francisco Maestre Subject: Re: [PATCH v2] staging: sm750fb: add const qualifier to string pointer arrays Message-ID: <202605051602.dWbzp24c-lkp@intel.com> References: <20260503005744.68974-1-francisco@maestretorreblanca.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260503005744.68974-1-francisco@maestretorreblanca.com> Hi Francisco, kernel test robot noticed the following build errors: [auto build test ERROR on staging/staging-testing] url: https://github.com/intel-lab-lkp/linux/commits/Francisco-Maestre/staging-sm750fb-add-const-qualifier-to-string-pointer-arrays/20260503-215917 base: staging/staging-testing patch link: https://lore.kernel.org/r/20260503005744.68974-1-francisco%40maestretorreblanca.com patch subject: [PATCH v2] staging: sm750fb: add const qualifier to string pointer arrays config: loongarch-allmodconfig (https://download.01.org/0day-ci/archive/20260505/202605051602.dWbzp24c-lkp@intel.com/config) compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260505/202605051602.dWbzp24c-lkp@intel.com/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 | Closes: https://lore.kernel.org/oe-kbuild-all/202605051602.dWbzp24c-lkp@intel.com/ All errors (new ones prefixed by >>): >> drivers/staging/sm750fb/sm750.c:785:19: error: cannot assign to variable 'g_fbmode' with const-qualified type 'const char *const[2]' 785 | g_fbmode[index] = g_def_fbmode; | ~~~~~~~~~~~~~~~ ^ drivers/staging/sm750fb/sm750.c:36:27: note: variable 'g_fbmode' declared const here 36 | static const char * const g_fbmode[] = {NULL, NULL}; | ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~ drivers/staging/sm750fb/sm750.c:787:20: error: cannot assign to variable 'g_fbmode' with const-qualified type 'const char *const[2]' 787 | g_fbmode[index] = g_fbmode[0]; | ~~~~~~~~~~~~~~~ ^ drivers/staging/sm750fb/sm750.c:36:27: note: variable 'g_fbmode' declared const here 36 | static const char * const g_fbmode[] = {NULL, NULL}; | ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~ drivers/staging/sm750fb/sm750.c:896:17: error: cannot assign to variable 'g_fbmode' with const-qualified type 'const char *const[2]' 896 | g_fbmode[0] = opt; | ~~~~~~~~~~~ ^ drivers/staging/sm750fb/sm750.c:36:27: note: variable 'g_fbmode' declared const here 36 | static const char * const g_fbmode[] = {NULL, NULL}; | ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~ drivers/staging/sm750fb/sm750.c:900:17: error: cannot assign to variable 'g_fbmode' with const-qualified type 'const char *const[2]' 900 | g_fbmode[1] = opt; | ~~~~~~~~~~~ ^ drivers/staging/sm750fb/sm750.c:36:27: note: variable 'g_fbmode' declared const here 36 | static const char * const g_fbmode[] = {NULL, NULL}; | ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~ 4 errors generated. vim +785 drivers/staging/sm750fb/sm750.c 81dee67e215b23 Sudip Mukherjee 2015-03-03 719 81dee67e215b23 Sudip Mukherjee 2015-03-03 720 static int lynxfb_set_fbinfo(struct fb_info *info, int index) 81dee67e215b23 Sudip Mukherjee 2015-03-03 721 { 81dee67e215b23 Sudip Mukherjee 2015-03-03 722 int i; 81dee67e215b23 Sudip Mukherjee 2015-03-03 723 struct lynxfb_par *par; e359b6a863e19f Mike Rapoport 2015-10-26 724 struct sm750_dev *sm750_dev; 81dee67e215b23 Sudip Mukherjee 2015-03-03 725 struct lynxfb_crtc *crtc; 81dee67e215b23 Sudip Mukherjee 2015-03-03 726 struct lynxfb_output *output; 81dee67e215b23 Sudip Mukherjee 2015-03-03 727 struct fb_var_screeninfo *var; 81dee67e215b23 Sudip Mukherjee 2015-03-03 728 struct fb_fix_screeninfo *fix; 81dee67e215b23 Sudip Mukherjee 2015-03-03 729 81dee67e215b23 Sudip Mukherjee 2015-03-03 730 const struct fb_videomode *pdb[] = { 81dee67e215b23 Sudip Mukherjee 2015-03-03 731 lynx750_ext, NULL, vesa_modes, 81dee67e215b23 Sudip Mukherjee 2015-03-03 732 }; 81dee67e215b23 Sudip Mukherjee 2015-03-03 733 int cdb[] = {ARRAY_SIZE(lynx750_ext), 0, VESA_MODEDB_SIZE}; d0856045f0e9fc Hungyu Lin 2026-04-01 734 static const char * const fix_id[2] = { 81dee67e215b23 Sudip Mukherjee 2015-03-03 735 "sm750_fb1", "sm750_fb2", 81dee67e215b23 Sudip Mukherjee 2015-03-03 736 }; 81dee67e215b23 Sudip Mukherjee 2015-03-03 737 81dee67e215b23 Sudip Mukherjee 2015-03-03 738 int ret, line_length; 81dee67e215b23 Sudip Mukherjee 2015-03-03 739 81dee67e215b23 Sudip Mukherjee 2015-03-03 740 ret = 0; 81dee67e215b23 Sudip Mukherjee 2015-03-03 741 par = (struct lynxfb_par *)info->par; e359b6a863e19f Mike Rapoport 2015-10-26 742 sm750_dev = par->dev; 81dee67e215b23 Sudip Mukherjee 2015-03-03 743 crtc = &par->crtc; 81dee67e215b23 Sudip Mukherjee 2015-03-03 744 output = &par->output; 81dee67e215b23 Sudip Mukherjee 2015-03-03 745 var = &info->var; 81dee67e215b23 Sudip Mukherjee 2015-03-03 746 fix = &info->fix; 81dee67e215b23 Sudip Mukherjee 2015-03-03 747 81dee67e215b23 Sudip Mukherjee 2015-03-03 748 /* set index */ 81dee67e215b23 Sudip Mukherjee 2015-03-03 749 par->index = index; 81dee67e215b23 Sudip Mukherjee 2015-03-03 750 output->channel = &crtc->channel; 81dee67e215b23 Sudip Mukherjee 2015-03-03 751 sm750fb_set_drv(par); 81dee67e215b23 Sudip Mukherjee 2015-03-03 752 d11ac7cbcc266c Sudip Mukherjee 2015-08-07 753 /* d11ac7cbcc266c Sudip Mukherjee 2015-08-07 754 * set current cursor variable and proc pointer, d11ac7cbcc266c Sudip Mukherjee 2015-08-07 755 * must be set after crtc member initialized d11ac7cbcc266c Sudip Mukherjee 2015-08-07 756 */ fdc234d85210d9 Benjamin Philip 2021-07-28 757 crtc->cursor.offset = crtc->o_screen + crtc->vidmem_size - 1024; e359b6a863e19f Mike Rapoport 2015-10-26 758 crtc->cursor.mmio = sm750_dev->pvReg + e359b6a863e19f Mike Rapoport 2015-10-26 759 0x800f0 + (int)crtc->channel * 0x140; 81dee67e215b23 Sudip Mukherjee 2015-03-03 760 cd33da26036ea5 Christopher Carbone 2022-08-23 761 crtc->cursor.max_h = 64; cd33da26036ea5 Christopher Carbone 2022-08-23 762 crtc->cursor.max_w = 64; 39f9137268ee3d Benjamin Philip 2021-07-26 763 crtc->cursor.size = crtc->cursor.max_h * crtc->cursor.max_w * 2 / 8; e359b6a863e19f Mike Rapoport 2015-10-26 764 crtc->cursor.vstart = sm750_dev->pvMem + crtc->cursor.offset; 81dee67e215b23 Sudip Mukherjee 2015-03-03 765 3de08a2d14ff8c Lorenzo Stoakes 2015-03-20 766 memset_io(crtc->cursor.vstart, 0, crtc->cursor.size); f7c8a046577e09 Thomas Zimmermann 2023-11-27 767 if (!g_hwcursor) 52d0744d751d8f Arnd Bergmann 2016-11-09 768 sm750_hw_cursor_disable(&crtc->cursor); 81dee67e215b23 Sudip Mukherjee 2015-03-03 769 81dee67e215b23 Sudip Mukherjee 2015-03-03 770 /* set info->fbops, must be set before fb_find_mode */ e359b6a863e19f Mike Rapoport 2015-10-26 771 if (!sm750_dev->accel_off) { 81dee67e215b23 Sudip Mukherjee 2015-03-03 772 /* use 2d acceleration */ f7c8a046577e09 Thomas Zimmermann 2023-11-27 773 if (!g_hwcursor) f7c8a046577e09 Thomas Zimmermann 2023-11-27 774 info->fbops = &lynxfb_ops_accel; f7c8a046577e09 Thomas Zimmermann 2023-11-27 775 else f7c8a046577e09 Thomas Zimmermann 2023-11-27 776 info->fbops = &lynxfb_ops_accel_with_cursor; f7c8a046577e09 Thomas Zimmermann 2023-11-27 777 } else { f7c8a046577e09 Thomas Zimmermann 2023-11-27 778 if (!g_hwcursor) 81dee67e215b23 Sudip Mukherjee 2015-03-03 779 info->fbops = &lynxfb_ops; f7c8a046577e09 Thomas Zimmermann 2023-11-27 780 else f7c8a046577e09 Thomas Zimmermann 2023-11-27 781 info->fbops = &lynxfb_ops_with_cursor; f7c8a046577e09 Thomas Zimmermann 2023-11-27 782 } 81dee67e215b23 Sudip Mukherjee 2015-03-03 783 81dee67e215b23 Sudip Mukherjee 2015-03-03 784 if (!g_fbmode[index]) { 81dee67e215b23 Sudip Mukherjee 2015-03-03 @785 g_fbmode[index] = g_def_fbmode; 81dee67e215b23 Sudip Mukherjee 2015-03-03 786 if (index) 81dee67e215b23 Sudip Mukherjee 2015-03-03 787 g_fbmode[index] = g_fbmode[0]; 81dee67e215b23 Sudip Mukherjee 2015-03-03 788 } 81dee67e215b23 Sudip Mukherjee 2015-03-03 789 81dee67e215b23 Sudip Mukherjee 2015-03-03 790 for (i = 0; i < 3; i++) { 81dee67e215b23 Sudip Mukherjee 2015-03-03 791 ret = fb_find_mode(var, info, g_fbmode[index], 81dee67e215b23 Sudip Mukherjee 2015-03-03 792 pdb[i], cdb[i], NULL, 8); 81dee67e215b23 Sudip Mukherjee 2015-03-03 793 db7fb3588ab492 Artem Lytkin 2026-02-23 794 if (ret == 1 || ret == 2) 81dee67e215b23 Sudip Mukherjee 2015-03-03 795 break; 81dee67e215b23 Sudip Mukherjee 2015-03-03 796 } 81dee67e215b23 Sudip Mukherjee 2015-03-03 797 81dee67e215b23 Sudip Mukherjee 2015-03-03 798 /* set par */ 81dee67e215b23 Sudip Mukherjee 2015-03-03 799 par->info = info; 81dee67e215b23 Sudip Mukherjee 2015-03-03 800 81dee67e215b23 Sudip Mukherjee 2015-03-03 801 /* set info */ e3a3f9f5123683 Mike Rapoport 2015-10-26 802 line_length = ALIGN((var->xres_virtual * var->bits_per_pixel / 8), e3a3f9f5123683 Mike Rapoport 2015-10-26 803 crtc->line_pad); 81dee67e215b23 Sudip Mukherjee 2015-03-03 804 81dee67e215b23 Sudip Mukherjee 2015-03-03 805 info->pseudo_palette = &par->pseudo_palette[0]; cc59bde1c920ab Benjamin Philip 2021-07-28 806 info->screen_base = crtc->v_screen; 81dee67e215b23 Sudip Mukherjee 2015-03-03 807 info->screen_size = line_length * var->yres_virtual; 81dee67e215b23 Sudip Mukherjee 2015-03-03 808 81dee67e215b23 Sudip Mukherjee 2015-03-03 809 /* set info->fix */ 81dee67e215b23 Sudip Mukherjee 2015-03-03 810 fix->type = FB_TYPE_PACKED_PIXELS; 81dee67e215b23 Sudip Mukherjee 2015-03-03 811 fix->type_aux = 0; 81dee67e215b23 Sudip Mukherjee 2015-03-03 812 fix->xpanstep = crtc->xpanstep; 81dee67e215b23 Sudip Mukherjee 2015-03-03 813 fix->ypanstep = crtc->ypanstep; 81dee67e215b23 Sudip Mukherjee 2015-03-03 814 fix->ywrapstep = crtc->ywrapstep; 81dee67e215b23 Sudip Mukherjee 2015-03-03 815 fix->accel = FB_ACCEL_SMI; 81dee67e215b23 Sudip Mukherjee 2015-03-03 816 8c475735085a7d Tim Wassink 2025-12-21 817 strscpy(fix->id, fix_id[index], sizeof(fix->id)); 81dee67e215b23 Sudip Mukherjee 2015-03-03 818 fdc234d85210d9 Benjamin Philip 2021-07-28 819 fix->smem_start = crtc->o_screen + sm750_dev->vidmem_start; d11ac7cbcc266c Sudip Mukherjee 2015-08-07 820 /* d11ac7cbcc266c Sudip Mukherjee 2015-08-07 821 * according to mmap experiment from user space application, 81dee67e215b23 Sudip Mukherjee 2015-03-03 822 * fix->mmio_len should not larger than virtual size 81dee67e215b23 Sudip Mukherjee 2015-03-03 823 * (xres_virtual x yres_virtual x ByPP) 81dee67e215b23 Sudip Mukherjee 2015-03-03 824 * Below line maybe buggy when user mmap fb dev node and write 81dee67e215b23 Sudip Mukherjee 2015-03-03 825 * data into the bound over virtual size d11ac7cbcc266c Sudip Mukherjee 2015-08-07 826 */ 81dee67e215b23 Sudip Mukherjee 2015-03-03 827 fix->smem_len = crtc->vidmem_size; 81dee67e215b23 Sudip Mukherjee 2015-03-03 828 info->screen_size = fix->smem_len; 81dee67e215b23 Sudip Mukherjee 2015-03-03 829 fix->line_length = line_length; e359b6a863e19f Mike Rapoport 2015-10-26 830 fix->mmio_start = sm750_dev->vidreg_start; e359b6a863e19f Mike Rapoport 2015-10-26 831 fix->mmio_len = sm750_dev->vidreg_size; b610e1193a917f Matej Dujava 2020-04-30 832 b610e1193a917f Matej Dujava 2020-04-30 833 lynxfb_set_visual_mode(info); 81dee67e215b23 Sudip Mukherjee 2015-03-03 834 81dee67e215b23 Sudip Mukherjee 2015-03-03 835 /* set var */ 81dee67e215b23 Sudip Mukherjee 2015-03-03 836 var->activate = FB_ACTIVATE_NOW; 81dee67e215b23 Sudip Mukherjee 2015-03-03 837 var->accel_flags = 0; 81dee67e215b23 Sudip Mukherjee 2015-03-03 838 var->vmode = FB_VMODE_NONINTERLACED; 81dee67e215b23 Sudip Mukherjee 2015-03-03 839 61c507cf652da1 Michel von Czettritz 2015-03-26 840 ret = fb_alloc_cmap(&info->cmap, 256, 0); 61c507cf652da1 Michel von Czettritz 2015-03-26 841 if (ret < 0) { fbab250eb51d6d Artem Lytkin 2026-02-07 842 dev_err(info->device, "Could not allocate memory for cmap.\n"); 81dee67e215b23 Sudip Mukherjee 2015-03-03 843 goto exit; 81dee67e215b23 Sudip Mukherjee 2015-03-03 844 } 81dee67e215b23 Sudip Mukherjee 2015-03-03 845 81dee67e215b23 Sudip Mukherjee 2015-03-03 846 exit: 81dee67e215b23 Sudip Mukherjee 2015-03-03 847 lynxfb_ops_check_var(var, info); 81dee67e215b23 Sudip Mukherjee 2015-03-03 848 return ret; 81dee67e215b23 Sudip Mukherjee 2015-03-03 849 } 81dee67e215b23 Sudip Mukherjee 2015-03-03 850 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki