linux-kernel - Re: [RESEND PATCH] drm/i915: constify pointers to hwmon_channel

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Message-ID: <87a5xskbny.fsf@intel.com>
Date:   Thu, 25 May 2023 12:22:57 +0300
From:   Jani Nikula <jani.nikula@...ux.intel.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: Re: [RESEND PATCH] drm/i915: constify pointers to hwmon_channel_info

On Thu, 11 May 2023, Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org> wrote:
> Statically allocated array of pointers to hwmon_channel_info can be made
> const for safety.

Btw if you want to further make things const, the compound literals
defined by HWMON_CHANNEL_INFO() still end up mutable, even if they're
only referenced inline using a const pointer. If possible, would be nice
to add const there too.

BR,
Jani.

>
> Acked-by: Jani Nikula <jani.nikula@...el.com>
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> ---
>  drivers/gpu/drm/i915/i915_hwmon.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_hwmon.c b/drivers/gpu/drm/i915/i915_hwmon.c
> index 8e7dccc8d3a0..e99e8c97ef01 100644
> --- a/drivers/gpu/drm/i915/i915_hwmon.c
> +++ b/drivers/gpu/drm/i915/i915_hwmon.c
> @@ -267,7 +267,7 @@ static const struct attribute_group *hwm_groups[] = {
>  	NULL
>  };
>  
> -static const struct hwmon_channel_info *hwm_info[] = {
> +static const struct hwmon_channel_info * const hwm_info[] = {
>  	HWMON_CHANNEL_INFO(in, HWMON_I_INPUT),
>  	HWMON_CHANNEL_INFO(power, HWMON_P_MAX | HWMON_P_RATED_MAX | HWMON_P_CRIT),
>  	HWMON_CHANNEL_INFO(energy, HWMON_E_INPUT),
> @@ -275,7 +275,7 @@ static const struct hwmon_channel_info *hwm_info[] = {
>  	NULL
>  };
>  
> -static const struct hwmon_channel_info *hwm_gt_info[] = {
> +static const struct hwmon_channel_info * const hwm_gt_info[] = {
>  	HWMON_CHANNEL_INFO(energy, HWMON_E_INPUT),
>  	NULL
>  };

-- 
Jani Nikula, Intel Open Source Graphics Center