linux-kernel - Re: [PATCH] drm/nouveau/bios/dp: make array vsoff static, shrinks object size

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Message-ID: <2d84fcfa-67af-ec76-5821-162004113bf3@canonical.com>
Date:   Thu, 24 Jan 2019 17:26:17 +0000
From:   Colin Ian King <colin.king@...onical.com>
To:     Ben Skeggs <bskeggs@...hat.com>, David Airlie <airlied@...ux.ie>,
        dri-devel@...ts.freedesktop.org, nouveau@...ts.freedesktop.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/nouveau/bios/dp: make array vsoff static, shrinks
 object size

ping?

On 04/09/2018 16:23, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> Don't populate the array vsoff on the stack but instead make it
> static. Makes the object code smaller by 67 bytes:
> 
> Before:
>    text	   data	    bss	    dec	    hex	filename
>    5753	    112	      0	   5865	   16e9	.../nouveau/nvkm/subdev/bios/dp.o
> 
> After:
>    text	   data	    bss	    dec	    hex	filename
>    5622	    176	      0	   5798	   16a6	.../nouveau/nvkm/subdev/bios/dp.o
> 
> (gcc version 8.2.0 x86_64)
> 
> Signed-off-by: Colin Ian King <colin.king@...onical.com>
> ---
>  drivers/gpu/drm/nouveau/nvkm/subdev/bios/dp.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/dp.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/dp.c
> index 3133b28f849c..b099d1209be8 100644
> --- a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/dp.c
> +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/dp.c
> @@ -212,7 +212,7 @@ nvbios_dpcfg_match(struct nvkm_bios *bios, u16 outp, u8 pc, u8 vs, u8 pe,
>  	u16 data;
>  
>  	if (*ver >= 0x30) {
> -		const u8 vsoff[] = { 0, 4, 7, 9 };
> +		static const u8 vsoff[] = { 0, 4, 7, 9 };
>  		idx = (pc * 10) + vsoff[vs] + pe;
>  		if (*ver >= 0x40 && *ver <= 0x41 && *hdr >= 0x12)
>  			idx += nvbios_rd08(bios, outp + 0x11) * 40;
>