linux-kernel - Re: [PATCH] drm: radeon: constify drm_prop_enum

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Message-ID: <d53470f2-2d59-b8c6-d820-268cc2eb19d3@vodafone.de>
Date:   Mon, 3 Jul 2017 09:18:12 +0200
From:   Christian König <deathsimple@...afone.de>
To:     Arvind Yadav <arvind.yadav.cs@...il.com>, daniel.vetter@...el.com,
        alexander.deucher@....com, christian.koenig@....com,
        airlied@...ux.ie
Cc:     dri-devel@...ts.freedesktop.org, amd-gfx@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm: radeon: constify drm_prop_enum_list structures.

Am 01.07.2017 um 11:47 schrieb Arvind Yadav:
> drm_prop_enum_lists are not supposed to change at runtime. All functions
> working with drm_prop_enum_list provided by <drm/drm_property.h> work with
> const drm_prop_enum_list. So mark the non-const structs as const.
>
> File size before:
>     text	   data	    bss	    dec	    hex	filename
>    18276	    384	      0	  18660	   48e4	drivers/gpu/drm/radeon/radeon_display.o
>
> File size After adding 'const':
>     text	   data	    bss	    dec	    hex	filename
>    18660	      0	      0	  18660	   48e4	drivers/gpu/drm/radeon/radeon_display.o
>
> Signed-off-by: Arvind Yadav <arvind.yadav.cs@...il.com>

Reviewed-by: Christian König <christian.koenig@....com>

> ---
>   drivers/gpu/drm/radeon/radeon_display.c | 12 ++++++------
>   1 file changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
> index 17d3daf..f339c1c 100644
> --- a/drivers/gpu/drm/radeon/radeon_display.c
> +++ b/drivers/gpu/drm/radeon/radeon_display.c
> @@ -1388,12 +1388,12 @@ static const struct drm_mode_config_funcs radeon_mode_funcs = {
>   	.output_poll_changed = radeon_output_poll_changed
>   };
>   
> -static struct drm_prop_enum_list radeon_tmds_pll_enum_list[] =
> +static const struct drm_prop_enum_list radeon_tmds_pll_enum_list[] =
>   {	{ 0, "driver" },
>   	{ 1, "bios" },
>   };
>   
> -static struct drm_prop_enum_list radeon_tv_std_enum_list[] =
> +static const struct drm_prop_enum_list radeon_tv_std_enum_list[] =
>   {	{ TV_STD_NTSC, "ntsc" },
>   	{ TV_STD_PAL, "pal" },
>   	{ TV_STD_PAL_M, "pal-m" },
> @@ -1404,25 +1404,25 @@ static struct drm_prop_enum_list radeon_tv_std_enum_list[] =
>   	{ TV_STD_SECAM, "secam" },
>   };
>   
> -static struct drm_prop_enum_list radeon_underscan_enum_list[] =
> +static const struct drm_prop_enum_list radeon_underscan_enum_list[] =
>   {	{ UNDERSCAN_OFF, "off" },
>   	{ UNDERSCAN_ON, "on" },
>   	{ UNDERSCAN_AUTO, "auto" },
>   };
>   
> -static struct drm_prop_enum_list radeon_audio_enum_list[] =
> +static const struct drm_prop_enum_list radeon_audio_enum_list[] =
>   {	{ RADEON_AUDIO_DISABLE, "off" },
>   	{ RADEON_AUDIO_ENABLE, "on" },
>   	{ RADEON_AUDIO_AUTO, "auto" },
>   };
>   
>   /* XXX support different dither options? spatial, temporal, both, etc. */
> -static struct drm_prop_enum_list radeon_dither_enum_list[] =
> +static const struct drm_prop_enum_list radeon_dither_enum_list[] =
>   {	{ RADEON_FMT_DITHER_DISABLE, "off" },
>   	{ RADEON_FMT_DITHER_ENABLE, "on" },
>   };
>   
> -static struct drm_prop_enum_list radeon_output_csc_enum_list[] =
> +static const struct drm_prop_enum_list radeon_output_csc_enum_list[] =
>   {	{ RADEON_OUTPUT_CSC_BYPASS, "bypass" },
>   	{ RADEON_OUTPUT_CSC_TVRGB, "tvrgb" },
>   	{ RADEON_OUTPUT_CSC_YCBCR601, "ycbcr601" },