* [PATCH v2] staging: sm750fb: add const qualifier to string pointer arrays
@ 2026-05-03 0:57 Francisco Maestre
2026-05-04 14:55 ` Greg KH
2026-05-05 8:11 ` kernel test robot
0 siblings, 2 replies; 3+ messages in thread
From: Francisco Maestre @ 2026-05-03 0:57 UTC (permalink / raw)
To: sudipm.mukherjee, teddy.wang, gregkh
Cc: linux-fbdev, linux-staging, linux-kernel, Francisco Maestre
Add 'const' qualifier to 'g_fbmode' and 'g_def_fbmode' pointer
declarations to make them 'static const char * const', as the
pointers themselves are not modified after initialization.
This fixes the following checkpatch.pl warning:
WARNING: static const char * array should probably be
static const char * const
Signed-off-by: Francisco Maestre <francisco@maestretorreblanca.com>
---
v2: Resend as individual patch, not part of an unrelated series.
drivers/staging/sm750fb/sm750.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/sm750fb/sm750.c b/drivers/staging/sm750fb/sm750.c
index 62f6e0cdff4d..dc9653ed2108 100644
--- a/drivers/staging/sm750fb/sm750.c
+++ b/drivers/staging/sm750fb/sm750.c
@@ -33,8 +33,8 @@
static int g_hwcursor = 1;
static int g_noaccel;
static int g_nomtrr;
-static const char *g_fbmode[] = {NULL, NULL};
-static const char *g_def_fbmode = "1024x768-32@60";
+static const char * const g_fbmode[] = {NULL, NULL};
+static const char * const g_def_fbmode = "1024x768-32@60";
static char *g_settings;
static int g_dualview;
static char *g_option;
--
2.50.1 (Apple Git-155)
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH v2] staging: sm750fb: add const qualifier to string pointer arrays
2026-05-03 0:57 [PATCH v2] staging: sm750fb: add const qualifier to string pointer arrays Francisco Maestre
@ 2026-05-04 14:55 ` Greg KH
2026-05-05 8:11 ` kernel test robot
1 sibling, 0 replies; 3+ messages in thread
From: Greg KH @ 2026-05-04 14:55 UTC (permalink / raw)
To: Francisco Maestre
Cc: sudipm.mukherjee, teddy.wang, linux-fbdev, linux-staging,
linux-kernel
On Sat, May 02, 2026 at 07:57:44PM -0500, Francisco Maestre wrote:
> Add 'const' qualifier to 'g_fbmode' and 'g_def_fbmode' pointer
> declarations to make them 'static const char * const', as the
> pointers themselves are not modified after initialization.
>
> This fixes the following checkpatch.pl warning:
> WARNING: static const char * array should probably be
> static const char * const
>
> Signed-off-by: Francisco Maestre <francisco@maestretorreblanca.com>
> ---
> v2: Resend as individual patch, not part of an unrelated series.
> drivers/staging/sm750fb/sm750.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/staging/sm750fb/sm750.c b/drivers/staging/sm750fb/sm750.c
> index 62f6e0cdff4d..dc9653ed2108 100644
> --- a/drivers/staging/sm750fb/sm750.c
> +++ b/drivers/staging/sm750fb/sm750.c
> @@ -33,8 +33,8 @@
> static int g_hwcursor = 1;
> static int g_noaccel;
> static int g_nomtrr;
> -static const char *g_fbmode[] = {NULL, NULL};
> -static const char *g_def_fbmode = "1024x768-32@60";
> +static const char * const g_fbmode[] = {NULL, NULL};
> +static const char * const g_def_fbmode = "1024x768-32@60";
> static char *g_settings;
> static int g_dualview;
> static char *g_option;
> --
> 2.50.1 (Apple Git-155)
>
>
Any reason why you did not test build this patch? Always do so so that
you don't get grumpy maintainers asking why you didn't test build your
patch :)
thanks,
greg k-h
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH v2] staging: sm750fb: add const qualifier to string pointer arrays
2026-05-03 0:57 [PATCH v2] staging: sm750fb: add const qualifier to string pointer arrays Francisco Maestre
2026-05-04 14:55 ` Greg KH
@ 2026-05-05 8:11 ` kernel test robot
1 sibling, 0 replies; 3+ messages in thread
From: kernel test robot @ 2026-05-05 8:11 UTC (permalink / raw)
To: Francisco Maestre, sudipm.mukherjee, teddy.wang, gregkh
Cc: llvm, oe-kbuild-all, linux-fbdev, linux-staging, linux-kernel,
Francisco Maestre
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 <lkp@intel.com>
| 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
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2026-05-03 0:57 [PATCH v2] staging: sm750fb: add const qualifier to string pointer arrays Francisco Maestre
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