linux-kernel - Re: [PATCH] drm/i915/dpll: make read-only array div1

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Date:   Wed, 09 Mar 2022 11:48:52 +0200
From:   Jani Nikula <jani.nikula@...ux.intel.com>
To:     Colin Ian King <colin.i.king@...il.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/i915/dpll: make read-only array div1_vals static const

On Mon, 07 Mar 2022, Colin Ian King <colin.i.king@...il.com> wrote:
> Don't populate the read-only array div1_vals on the stack but
> instead make it static const. Also makes the object code a little
> smaller.

Thanks, but this was just fixed in commit fe70b262e781 ("drm/i915: Move
a bunch of stuff into rodata from the stack").

BR,
Jani.

>
> Signed-off-by: Colin Ian King <colin.i.king@...il.com>
> ---
>  drivers/gpu/drm/i915/display/intel_dpll_mgr.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_dpll_mgr.c b/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
> index 569903d47aea..17668b58b30c 100644
> --- a/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
> +++ b/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
> @@ -2759,7 +2759,7 @@ static bool icl_mg_pll_find_divisors(int clock_khz, bool is_dp, bool use_ssc,
>  				     bool is_dkl)
>  {
>  	u32 dco_min_freq, dco_max_freq;
> -	int div1_vals[] = {7, 5, 3, 2};
> +	static const int div1_vals[] = {7, 5, 3, 2};
>  	unsigned int i;
>  	int div2;

-- 
Jani Nikula, Intel Open Source Graphics Center