linux-kernel - Re: [PATCH v2] drm/tilcdc: add const to of_device

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Date:   Thu, 16 Dec 2021 01:44:43 -0800
From:   Joe Perches <joe@...ches.com>
To:     Xiang wangx <wangxiang@...rlc.com>, jyri.sarha@....fi
Cc:     tomba@...nel.org, airlied@...ux.ie, daniel@...ll.ch,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] drm/tilcdc: add const to of_device_id

On Thu, 2021-12-16 at 17:26 +0800, Xiang wangx wrote:
> struct of_device_id should normally be const.
[]
> diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
[]
> @@ -60,7 +60,7 @@ void tilcdc_module_cleanup(struct tilcdc_module *mod)
>  	list_del(&mod->list);
>  }
>  
> -static struct of_device_id tilcdc_of_match[];
> +static const struct of_device_id tilcdc_of_match[];

This line could likely be removed instead.

$ git grep -w -n tilcdc_of_match
drivers/gpu/drm/tilcdc/tilcdc_drv.c:63:static struct of_device_id tilcdc_of_match[];
drivers/gpu/drm/tilcdc/tilcdc_drv.c:590:static struct of_device_id tilcdc_of_match[] = {
drivers/gpu/drm/tilcdc/tilcdc_drv.c:595:MODULE_DEVICE_TABLE(of, tilcdc_of_match);
drivers/gpu/drm/tilcdc/tilcdc_drv.c:603:                .of_match_table = tilcdc_of_match,

> @@ -587,7 +587,7 @@ static int tilcdc_pdev_remove(struct platform_device *pdev)
>  	return 0;
>  }
>  
> -static struct of_device_id tilcdc_of_match[] = {
> +static const struct of_device_id tilcdc_of_match[] = {
>  		{ .compatible = "ti,am33xx-tilcdc", },
>  		{ .compatible = "ti,da850-tilcdc", },
>  		{ },