linux-kernel - Re: [PATCH] drm: msm: hdmi: Constify static structs

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Date:   Fri, 1 Oct 2021 20:25:21 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Rikard Falkeborn <rikard.falkeborn@...il.com>,
        Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm: msm: hdmi: Constify static structs

On 21/09/2021 00:20, Rikard Falkeborn wrote:
> The only usage of hdmi_8996_pll_ops is to assign its address to the ops
> field in the clk_init_data struct, and the only usage of pll_init is to
> assign its address to the init field in the clk_hw struct, both which
> are pointers to const. Make them const to allow the compiler to put them
> in read-only memory.
> 
> Signed-off-by: Rikard Falkeborn <rikard.falkeborn@...il.com>

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

> ---
>   drivers/gpu/drm/msm/hdmi/hdmi_phy_8996.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_phy_8996.c b/drivers/gpu/drm/msm/hdmi/hdmi_phy_8996.c
> index a8f3b2cbfdc5..99c7853353fd 100644
> --- a/drivers/gpu/drm/msm/hdmi/hdmi_phy_8996.c
> +++ b/drivers/gpu/drm/msm/hdmi/hdmi_phy_8996.c
> @@ -682,7 +682,7 @@ static int hdmi_8996_pll_is_enabled(struct clk_hw *hw)
>   	return pll_locked;
>   }
>   
> -static struct clk_ops hdmi_8996_pll_ops = {
> +static const struct clk_ops hdmi_8996_pll_ops = {
>   	.set_rate = hdmi_8996_pll_set_clk_rate,
>   	.round_rate = hdmi_8996_pll_round_rate,
>   	.recalc_rate = hdmi_8996_pll_recalc_rate,
> @@ -695,7 +695,7 @@ static const char * const hdmi_pll_parents[] = {
>   	"xo",
>   };
>   
> -static struct clk_init_data pll_init = {
> +static const struct clk_init_data pll_init = {
>   	.name = "hdmipll",
>   	.ops = &hdmi_8996_pll_ops,
>   	.parent_names = hdmi_pll_parents,
> 


-- 
With best wishes
Dmitry