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X-CSE-ConnectionGUID: oka8hq5SQTuRhTa10vcF8g== X-CSE-MsgGUID: VLiE3gVQRoq3vQFYnna4xQ== X-IronPort-AV: E=McAfee;i="6800,10657,11722"; a="73023466" X-IronPort-AV: E=Sophos;i="6.23,107,1770624000"; d="scan'208";a="73023466" Received: from fmviesa010.fm.intel.com ([10.60.135.150]) by fmvoesa113.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Mar 2026 17:46:33 -0800 X-CSE-ConnectionGUID: 9guqWbkSRw2oUxLi2nOdqg== X-CSE-MsgGUID: azmyA512QD6t7XNcwgzTzg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,107,1770624000"; d="scan'208";a="216416294" Received: from lkp-server01.sh.intel.com (HELO 058beb05654c) ([10.239.97.150]) by fmviesa010.fm.intel.com with ESMTP; 07 Mar 2026 17:46:31 -0800 Received: from kbuild by 058beb05654c with local (Exim 4.98.2) (envelope-from ) id 1vz3Dw-000000002mr-1frU; Sun, 08 Mar 2026 01:46:28 +0000 Date: Sun, 8 Mar 2026 09:45:41 +0800 From: kernel test robot To: Oskar Ray-Frayssinet , 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, Oskar Ray-Frayssinet Subject: Re: [PATCH] staging: sm750fb: add missing const qualifier to char pointer array Message-ID: <202603080944.rMPCAhoj-lkp@intel.com> References: <20260307131833.1138-1-rayfraytech@gmail.com> Precedence: bulk X-Mailing-List: linux-staging@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260307131833.1138-1-rayfraytech@gmail.com> Hi Oskar, 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/Oskar-Ray-Frayssinet/staging-sm750fb-add-missing-const-qualifier-to-char-pointer-array/20260307-212030 base: staging/staging-testing patch link: https://lore.kernel.org/r/20260307131833.1138-1-rayfraytech%40gmail.com patch subject: [PATCH] staging: sm750fb: add missing const qualifier to char pointer array config: i386-buildonly-randconfig-003-20260308 (https://download.01.org/0day-ci/archive/20260308/202603080944.rMPCAhoj-lkp@intel.com/config) compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260308/202603080944.rMPCAhoj-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/202603080944.rMPCAhoj-lkp@intel.com/ All errors (new ones prefixed by >>): >> drivers/staging/sm750fb/sm750.c:782:19: error: cannot assign to variable 'g_fbmode' with const-qualified type 'const char *const[2]' 782 | 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:784:20: error: cannot assign to variable 'g_fbmode' with const-qualified type 'const char *const[2]' 784 | 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:893:17: error: cannot assign to variable 'g_fbmode' with const-qualified type 'const char *const[2]' 893 | 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:897:17: error: cannot assign to variable 'g_fbmode' with const-qualified type 'const char *const[2]' 897 | 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 +782 drivers/staging/sm750fb/sm750.c 81dee67e215b23f Sudip Mukherjee 2015-03-03 716 81dee67e215b23f Sudip Mukherjee 2015-03-03 717 static int lynxfb_set_fbinfo(struct fb_info *info, int index) 81dee67e215b23f Sudip Mukherjee 2015-03-03 718 { 81dee67e215b23f Sudip Mukherjee 2015-03-03 719 int i; 81dee67e215b23f Sudip Mukherjee 2015-03-03 720 struct lynxfb_par *par; e359b6a863e19f2 Mike Rapoport 2015-10-26 721 struct sm750_dev *sm750_dev; 81dee67e215b23f Sudip Mukherjee 2015-03-03 722 struct lynxfb_crtc *crtc; 81dee67e215b23f Sudip Mukherjee 2015-03-03 723 struct lynxfb_output *output; 81dee67e215b23f Sudip Mukherjee 2015-03-03 724 struct fb_var_screeninfo *var; 81dee67e215b23f Sudip Mukherjee 2015-03-03 725 struct fb_fix_screeninfo *fix; 81dee67e215b23f Sudip Mukherjee 2015-03-03 726 81dee67e215b23f Sudip Mukherjee 2015-03-03 727 const struct fb_videomode *pdb[] = { 81dee67e215b23f Sudip Mukherjee 2015-03-03 728 lynx750_ext, NULL, vesa_modes, 81dee67e215b23f Sudip Mukherjee 2015-03-03 729 }; 81dee67e215b23f Sudip Mukherjee 2015-03-03 730 int cdb[] = {ARRAY_SIZE(lynx750_ext), 0, VESA_MODEDB_SIZE}; 8c475735085a7db Tim Wassink 2025-12-21 731 static const char *fix_id[2] = { 81dee67e215b23f Sudip Mukherjee 2015-03-03 732 "sm750_fb1", "sm750_fb2", 81dee67e215b23f Sudip Mukherjee 2015-03-03 733 }; 81dee67e215b23f Sudip Mukherjee 2015-03-03 734 81dee67e215b23f Sudip Mukherjee 2015-03-03 735 int ret, line_length; 81dee67e215b23f Sudip Mukherjee 2015-03-03 736 81dee67e215b23f Sudip Mukherjee 2015-03-03 737 ret = 0; 81dee67e215b23f Sudip Mukherjee 2015-03-03 738 par = (struct lynxfb_par *)info->par; e359b6a863e19f2 Mike Rapoport 2015-10-26 739 sm750_dev = par->dev; 81dee67e215b23f Sudip Mukherjee 2015-03-03 740 crtc = &par->crtc; 81dee67e215b23f Sudip Mukherjee 2015-03-03 741 output = &par->output; 81dee67e215b23f Sudip Mukherjee 2015-03-03 742 var = &info->var; 81dee67e215b23f Sudip Mukherjee 2015-03-03 743 fix = &info->fix; 81dee67e215b23f Sudip Mukherjee 2015-03-03 744 81dee67e215b23f Sudip Mukherjee 2015-03-03 745 /* set index */ 81dee67e215b23f Sudip Mukherjee 2015-03-03 746 par->index = index; 81dee67e215b23f Sudip Mukherjee 2015-03-03 747 output->channel = &crtc->channel; 81dee67e215b23f Sudip Mukherjee 2015-03-03 748 sm750fb_set_drv(par); 81dee67e215b23f Sudip Mukherjee 2015-03-03 749 d11ac7cbcc266c6 Sudip Mukherjee 2015-08-07 750 /* d11ac7cbcc266c6 Sudip Mukherjee 2015-08-07 751 * set current cursor variable and proc pointer, d11ac7cbcc266c6 Sudip Mukherjee 2015-08-07 752 * must be set after crtc member initialized d11ac7cbcc266c6 Sudip Mukherjee 2015-08-07 753 */ fdc234d85210d91 Benjamin Philip 2021-07-28 754 crtc->cursor.offset = crtc->o_screen + crtc->vidmem_size - 1024; e359b6a863e19f2 Mike Rapoport 2015-10-26 755 crtc->cursor.mmio = sm750_dev->pvReg + e359b6a863e19f2 Mike Rapoport 2015-10-26 756 0x800f0 + (int)crtc->channel * 0x140; 81dee67e215b23f Sudip Mukherjee 2015-03-03 757 cd33da26036ea54 Christopher Carbone 2022-08-23 758 crtc->cursor.max_h = 64; cd33da26036ea54 Christopher Carbone 2022-08-23 759 crtc->cursor.max_w = 64; 39f9137268ee3df Benjamin Philip 2021-07-26 760 crtc->cursor.size = crtc->cursor.max_h * crtc->cursor.max_w * 2 / 8; e359b6a863e19f2 Mike Rapoport 2015-10-26 761 crtc->cursor.vstart = sm750_dev->pvMem + crtc->cursor.offset; 81dee67e215b23f Sudip Mukherjee 2015-03-03 762 3de08a2d14ff8c7 Lorenzo Stoakes 2015-03-20 763 memset_io(crtc->cursor.vstart, 0, crtc->cursor.size); f7c8a046577e09d Thomas Zimmermann 2023-11-27 764 if (!g_hwcursor) 52d0744d751d8f1 Arnd Bergmann 2016-11-09 765 sm750_hw_cursor_disable(&crtc->cursor); 81dee67e215b23f Sudip Mukherjee 2015-03-03 766 81dee67e215b23f Sudip Mukherjee 2015-03-03 767 /* set info->fbops, must be set before fb_find_mode */ e359b6a863e19f2 Mike Rapoport 2015-10-26 768 if (!sm750_dev->accel_off) { 81dee67e215b23f Sudip Mukherjee 2015-03-03 769 /* use 2d acceleration */ f7c8a046577e09d Thomas Zimmermann 2023-11-27 770 if (!g_hwcursor) f7c8a046577e09d Thomas Zimmermann 2023-11-27 771 info->fbops = &lynxfb_ops_accel; f7c8a046577e09d Thomas Zimmermann 2023-11-27 772 else f7c8a046577e09d Thomas Zimmermann 2023-11-27 773 info->fbops = &lynxfb_ops_accel_with_cursor; f7c8a046577e09d Thomas Zimmermann 2023-11-27 774 } else { f7c8a046577e09d Thomas Zimmermann 2023-11-27 775 if (!g_hwcursor) 81dee67e215b23f Sudip Mukherjee 2015-03-03 776 info->fbops = &lynxfb_ops; f7c8a046577e09d Thomas Zimmermann 2023-11-27 777 else f7c8a046577e09d Thomas Zimmermann 2023-11-27 778 info->fbops = &lynxfb_ops_with_cursor; f7c8a046577e09d Thomas Zimmermann 2023-11-27 779 } 81dee67e215b23f Sudip Mukherjee 2015-03-03 780 81dee67e215b23f Sudip Mukherjee 2015-03-03 781 if (!g_fbmode[index]) { 81dee67e215b23f Sudip Mukherjee 2015-03-03 @782 g_fbmode[index] = g_def_fbmode; 81dee67e215b23f Sudip Mukherjee 2015-03-03 783 if (index) 81dee67e215b23f Sudip Mukherjee 2015-03-03 784 g_fbmode[index] = g_fbmode[0]; 81dee67e215b23f Sudip Mukherjee 2015-03-03 785 } 81dee67e215b23f Sudip Mukherjee 2015-03-03 786 81dee67e215b23f Sudip Mukherjee 2015-03-03 787 for (i = 0; i < 3; i++) { 81dee67e215b23f Sudip Mukherjee 2015-03-03 788 ret = fb_find_mode(var, info, g_fbmode[index], 81dee67e215b23f Sudip Mukherjee 2015-03-03 789 pdb[i], cdb[i], NULL, 8); 81dee67e215b23f Sudip Mukherjee 2015-03-03 790 db7fb3588ab4920 Artem Lytkin 2026-02-23 791 if (ret == 1 || ret == 2) 81dee67e215b23f Sudip Mukherjee 2015-03-03 792 break; 81dee67e215b23f Sudip Mukherjee 2015-03-03 793 } 81dee67e215b23f Sudip Mukherjee 2015-03-03 794 81dee67e215b23f Sudip Mukherjee 2015-03-03 795 /* set par */ 81dee67e215b23f Sudip Mukherjee 2015-03-03 796 par->info = info; 81dee67e215b23f Sudip Mukherjee 2015-03-03 797 81dee67e215b23f Sudip Mukherjee 2015-03-03 798 /* set info */ e3a3f9f5123683b Mike Rapoport 2015-10-26 799 line_length = ALIGN((var->xres_virtual * var->bits_per_pixel / 8), e3a3f9f5123683b Mike Rapoport 2015-10-26 800 crtc->line_pad); 81dee67e215b23f Sudip Mukherjee 2015-03-03 801 81dee67e215b23f Sudip Mukherjee 2015-03-03 802 info->pseudo_palette = &par->pseudo_palette[0]; cc59bde1c920ab6 Benjamin Philip 2021-07-28 803 info->screen_base = crtc->v_screen; 81dee67e215b23f Sudip Mukherjee 2015-03-03 804 info->screen_size = line_length * var->yres_virtual; 81dee67e215b23f Sudip Mukherjee 2015-03-03 805 81dee67e215b23f Sudip Mukherjee 2015-03-03 806 /* set info->fix */ 81dee67e215b23f Sudip Mukherjee 2015-03-03 807 fix->type = FB_TYPE_PACKED_PIXELS; 81dee67e215b23f Sudip Mukherjee 2015-03-03 808 fix->type_aux = 0; 81dee67e215b23f Sudip Mukherjee 2015-03-03 809 fix->xpanstep = crtc->xpanstep; 81dee67e215b23f Sudip Mukherjee 2015-03-03 810 fix->ypanstep = crtc->ypanstep; 81dee67e215b23f Sudip Mukherjee 2015-03-03 811 fix->ywrapstep = crtc->ywrapstep; 81dee67e215b23f Sudip Mukherjee 2015-03-03 812 fix->accel = FB_ACCEL_SMI; 81dee67e215b23f Sudip Mukherjee 2015-03-03 813 8c475735085a7db Tim Wassink 2025-12-21 814 strscpy(fix->id, fix_id[index], sizeof(fix->id)); 81dee67e215b23f Sudip Mukherjee 2015-03-03 815 fdc234d85210d91 Benjamin Philip 2021-07-28 816 fix->smem_start = crtc->o_screen + sm750_dev->vidmem_start; d11ac7cbcc266c6 Sudip Mukherjee 2015-08-07 817 /* d11ac7cbcc266c6 Sudip Mukherjee 2015-08-07 818 * according to mmap experiment from user space application, 81dee67e215b23f Sudip Mukherjee 2015-03-03 819 * fix->mmio_len should not larger than virtual size 81dee67e215b23f Sudip Mukherjee 2015-03-03 820 * (xres_virtual x yres_virtual x ByPP) 81dee67e215b23f Sudip Mukherjee 2015-03-03 821 * Below line maybe buggy when user mmap fb dev node and write 81dee67e215b23f Sudip Mukherjee 2015-03-03 822 * data into the bound over virtual size d11ac7cbcc266c6 Sudip Mukherjee 2015-08-07 823 */ 81dee67e215b23f Sudip Mukherjee 2015-03-03 824 fix->smem_len = crtc->vidmem_size; 81dee67e215b23f Sudip Mukherjee 2015-03-03 825 info->screen_size = fix->smem_len; 81dee67e215b23f Sudip Mukherjee 2015-03-03 826 fix->line_length = line_length; e359b6a863e19f2 Mike Rapoport 2015-10-26 827 fix->mmio_start = sm750_dev->vidreg_start; e359b6a863e19f2 Mike Rapoport 2015-10-26 828 fix->mmio_len = sm750_dev->vidreg_size; b610e1193a917f4 Matej Dujava 2020-04-30 829 b610e1193a917f4 Matej Dujava 2020-04-30 830 lynxfb_set_visual_mode(info); 81dee67e215b23f Sudip Mukherjee 2015-03-03 831 81dee67e215b23f Sudip Mukherjee 2015-03-03 832 /* set var */ 81dee67e215b23f Sudip Mukherjee 2015-03-03 833 var->activate = FB_ACTIVATE_NOW; 81dee67e215b23f Sudip Mukherjee 2015-03-03 834 var->accel_flags = 0; 81dee67e215b23f Sudip Mukherjee 2015-03-03 835 var->vmode = FB_VMODE_NONINTERLACED; 81dee67e215b23f Sudip Mukherjee 2015-03-03 836 61c507cf652da1b Michel von Czettritz 2015-03-26 837 ret = fb_alloc_cmap(&info->cmap, 256, 0); 61c507cf652da1b Michel von Czettritz 2015-03-26 838 if (ret < 0) { fbab250eb51d6d6 Artem Lytkin 2026-02-07 839 dev_err(info->device, "Could not allocate memory for cmap.\n"); 81dee67e215b23f Sudip Mukherjee 2015-03-03 840 goto exit; 81dee67e215b23f Sudip Mukherjee 2015-03-03 841 } 81dee67e215b23f Sudip Mukherjee 2015-03-03 842 81dee67e215b23f Sudip Mukherjee 2015-03-03 843 exit: 81dee67e215b23f Sudip Mukherjee 2015-03-03 844 lynxfb_ops_check_var(var, info); 81dee67e215b23f Sudip Mukherjee 2015-03-03 845 return ret; 81dee67e215b23f Sudip Mukherjee 2015-03-03 846 } 81dee67e215b23f Sudip Mukherjee 2015-03-03 847 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki