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Date:   Mon, 2 Aug 2021 08:04:39 +0000
From:   Pkshih <pkshih@...ltek.com>
To:     "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "colin.king@...onical.com" <colin.king@...onical.com>,
        "kvalo@...eaurora.org" <kvalo@...eaurora.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "davem@...emloft.net" <davem@...emloft.net>
CC:     "kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] rtlwifi: rtl8192de:  make arrays static const, makes object smaller

On Sat, 2021-07-31 at 13:40 +0100, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> Don't populate arrays the stack but instead make them static const
> Makes the object code smaller by 852 bytes.
> 
> Before:
>    text	   data	    bss	    dec	    hex	filename
>  128211	  44250	   1024	 173485	  2a5ad	../realtek/rtlwifi/rt
> l8192de/phy.o
> 
> After:
>    text	   data	    bss	    dec	    hex	filename
>  127199	  44410	   1024	 172633	  2a259	../realtek/rtlwifi/rt
> l8192de/phy.o
> 
> (gcc version 10.2.0)
> 
> Signed-off-by: Colin Ian King <colin.king@...onical.com>
> ---
>  drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c
> b/drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c
> index 4eaa40d73baf..79956254f798 100644
> --- a/drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c
> +++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c
> @@ -1354,7 +1354,7 @@ static void
> _rtl92d_phy_switch_rf_setting(struct ieee80211_hw *hw, u8 channel)
>  
>  u8 rtl92d_get_rightchnlplace_for_iqk(u8 chnl)
>  {
> -	u8 channel_all[59] = {
> +	static const u8 channel_all[59] = {
>  		1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
>  		36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58,
>  		60, 62, 64, 100, 102, 104, 106, 108, 110, 112,
> @@ -3220,7 +3220,7 @@ void rtl92d_phy_config_macphymode_info(struct
> ieee80211_hw *hw)
>  u8 rtl92d_get_chnlgroup_fromarray(u8 chnl)
>  {
>  	u8 group;
> -	u8 channel_info[59] = {
> +	static const u8 channel_info[59] = {
>  		1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
>  		36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56,
>  		58, 60, 62, 64, 100, 102, 104, 106, 108,
> -- 
> 2.31.1
> 
> ------Please consider the environment before printing this e-mail.

Acked-by: Ping-Ke Shih <pkshih@...ltek.com>


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