linux-kernel - Re: [PATCH] media: hantro: Constify static struct v4l2_m2m

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Message-ID: <YUxl/r8P2/k13FQZ@fedora>
Date:   Thu, 23 Sep 2021 08:33:18 -0300
From:   Ezequiel Garcia <ezequiel@...guardiasur.com.ar>
To:     Rikard Falkeborn <rikard.falkeborn@...il.com>
Cc:     Philipp Zabel <p.zabel@...gutronix.de>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-media@...r.kernel.org, linux-rockchip@...ts.infradead.org,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] media: hantro: Constify static struct v4l2_m2m_ops

On Mon, Sep 20, 2021 at 10:02:10PM +0200, Rikard Falkeborn wrote:
> The only usage of vpu_m2m_ops is to pass its address to v4l2_m2m_init()
> which has a pointer to const struct v4l2_m2m_ops as argument. Make it
> const to allow the compiler to put it in read-only memory.
> 
> Signed-off-by: Rikard Falkeborn <rikard.falkeborn@...il.com>

Reviewed-by: Ezequiel Garcia <ezequiel@...guardiasur.com.ar>

> ---
>  drivers/staging/media/hantro/hantro_drv.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/staging/media/hantro/hantro_drv.c b/drivers/staging/media/hantro/hantro_drv.c
> index f23fc14b3562..fb82b9297a2b 100644
> --- a/drivers/staging/media/hantro/hantro_drv.c
> +++ b/drivers/staging/media/hantro/hantro_drv.c
> @@ -179,7 +179,7 @@ static void device_run(void *priv)
>  	hantro_job_finish_no_pm(ctx->dev, ctx, VB2_BUF_STATE_ERROR);
>  }
>  
> -static struct v4l2_m2m_ops vpu_m2m_ops = {
> +static const struct v4l2_m2m_ops vpu_m2m_ops = {
>  	.device_run = device_run,
>  };
>  
> -- 
> 2.33.0
>