linux-kernel - Re: [PATCH] drm/amdgpu/display: make various arrays static, makes object smaller

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Date:   Tue, 08 Oct 2019 07:00:13 -0700
From:   Joe Perches <joe@...ches.com>
To:     Harry Wentland <hwentlan@....com>,
        Colin King <colin.king@...onical.com>,
        "Wentland, Harry" <Harry.Wentland@....com>,
        "Li, Sun peng (Leo)" <Sunpeng.Li@....com>,
        "Deucher, Alexander" <Alexander.Deucher@....com>,
        "Koenig, Christian" <Christian.Koenig@....com>,
        "Zhou, David(ChunMing)" <David1.Zhou@....com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        "amd-gfx@...ts.freedesktop.org" <amd-gfx@...ts.freedesktop.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>
Cc:     "kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/amdgpu/display: make various arrays static, makes
 object smaller

On Tue, 2019-10-08 at 13:56 +0000, Harry Wentland wrote:
[]
> > diff --git a/drivers/gpu/drm/amd/display/dc/bios/bios_parser.c b/drivers/gpu/drm/amd/display/dc/bios/bios_parser.c
> []
> > @@ -2745,7 +2745,7 @@ static enum bp_result bios_get_board_layout_info(
> >  	struct bios_parser *bp;
> >  	enum bp_result record_result;
> >  
> > -	const unsigned int slot_index_to_vbios_id[MAX_BOARD_SLOTS] = {
> > +	static const unsigned int slot_index_to_vbios_id[MAX_BOARD_SLOTS] = {
> 
> Won't this break the multi-GPU case where you'll have multiple driver
> instances with different layout?

As the array is read-only, how could that happen?