Re: [PATCH][next] drm/edid: make read-only const array static

[Jani Nikula]

On Tue, 27 Jun 2023, Colin Ian King <colin.i.king@xxxxxxxxx> wrote:
> Don't populate the const array on the stack, instead make it static.
>
> Signed-off-by: Colin Ian King <colin.i.king@xxxxxxxxx>

Thanks, pushed to drm-misc-next.

> ---
>  drivers/gpu/drm/drm_edid.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index e0dbd9140726..39b13417b749 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -3962,7 +3962,7 @@ static int drm_cvt_modes(struct drm_connector *connector,
>  	struct drm_display_mode *newmode;
>  	struct drm_device *dev = connector->dev;
>  	const struct cvt_timing *cvt;
> -	const int rates[] = { 60, 85, 75, 60, 50 };
> +	static const int rates[] = { 60, 85, 75, 60, 50 };
>  	const u8 empty[3] = { 0, 0, 0 };

Side note, this could be removed by replacing

	if (!memcmp(cvt->code, empty, 3))

with

	if (!memchr_inv(cvt->code, 0, 3))

or even

	if (!cvt->code[0] && !cvt->code[1] && !cvt->code[2])

BR,
Jani.

>  
>  	for (i = 0; i < 4; i++) {

-- 
Jani Nikula, Intel Open Source Graphics Center